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International Space Flight (ESA, Russia, China and others) => Indian Launchers => Topic started by: input~2 on 02/27/2016 02:17 PM

Title: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: input~2 on 02/27/2016 02:17 PM
This launch could take place in 2016-H2 and also carry 2 PlanetiQ small sats
Title: Re: Resourcesat-2A/SCATSat-1 - PSLV C35 - 2016-H2
Post by: input~2 on 02/27/2016 02:19 PM
Press Information Bureau
Government of India
Department of Space

25-February-2016 15:38 IST
US Launch Orders to ISRO

During October 2015, Antrix Corporation Limited (Antrix), the commercial arm of Indian Space Research Organisation (ISRO), has signed Launch Services Agreement with M/s. PlanetIQ, an American Company, for launching two of their satellites on-board ISRO’s Polar Satellite Launch Vehicle (PSLV). These satellites are meant for studying certain weather parameters.

This information was provided by the Union Minister of State (Independent Charge) Development of North-Eastern Region (DoNER), MoS PMO, Personnel, Public Grievances & Pensions, Atomic Energy and Space, Dr Jitendra Singh in a reply to an unstarred question in Rajya Sabha today.
Title: Re: Resourcesat-2A/SCATSat-1 - PSLV C35 - 2016-H2
Post by: wsl2005 on 03/25/2016 07:56 AM
Blacksky pathfinder Integration
(http://)
Title: Re: Resourcesat-2A/SCATSat-1 - PSLV C35 - July 2016
Post by: ss1_3 on 05/27/2016 03:00 AM
LISS-4 Payload Flag Off

 After Successful T & E, LISS-4 Payload of Resourcesat-2A satellite was flagged off by Director, SAC to ISAC on May 16, 2016 for integration with S/C

Source: http://www.sac.gov.in
Title: Re: Resourcesat-2A/SCATSat-1 - PSLV C35 - July 2016
Post by: vyoma on 06/29/2016 05:14 AM
Quote
SCATSAT-1 Payload Flag Off
After succesful Test & Evaluation SCATSAT-1 payload was flagged off By Shri. Tapan Misra on June 17, 2016 to ISAC for further integration with Spacecraft.
Title: Re: Resourcesat-2A/SCATSat-1 - PSLV C35 - July 2016
Post by: m.prasad on 06/30/2016 01:40 PM
Are Venta-1 and Max Valier going along with these sats? Any how, next PSLV is not possible before Feb'17 as per the ISRO's launch schedule.

Thx
~Prasad
Title: Re: Resourcesat-2A/SCATSat-1 - PSLV C35 - July 2016
Post by: isro-watch on 07/02/2016 12:41 AM
Yes ! Those sats are expected in this launch

Title: Re: Resourcesat-2A/SCATSat-1 - PSLV C35 - July 2016
Post by: m.prasad on 07/04/2016 04:13 AM
Reddit/ISRO page is showing a separate launch for Resourcesat-2A with C36. Refer (https://www.reddit.com/r/ISRO/)

and these are the pending foreign contracts for the current year:

MaxValier Germany 20Kg    2016
Venta-1  Germany 20Kg      2016
NLS-19 Canada 7Kg            2016
Pathfinder-1 USA 50Kg        2016
ALSAT-2B Algeria 120Kg      2016
ALSAT-1B Algeria 110Kg      2016
ALSAT-1N Algeria 7 Kg        2016

If so, ISRO has to accommodate all these on C35 & C36. :)

Thx
~Prasad
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - August 2016
Post by: input~2 on 07/22/2016 07:21 PM
Quote
[Sivan] said that the Indian satellite will be a co-passenger to an Algerian satellite."Both the satellites will be put into different orbits. So the fourth stage/engine of the rocket will be switched off after ejecting ScatSat first. Then after a gap of around 30 minutes, the engine will be switched on and put the Algerian satellite into its intended orbit," Sivan said
http://gadgets.ndtv.com/science/news/isro-to-launch-insat-3dr-weather-satellite-in-august-864096
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - end August 2016
Post by: input~2 on 07/23/2016 07:43 AM
Launch planned for end August
http://www.andhrabhoomi.net/content/nation-829
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 2016
Post by: input~2 on 07/29/2016 01:30 PM
Launch planned for September
http://www.thenewsminute.com/article/isro-all-set-launch-indigenous-weather-satellite-august-28-47302
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 2016
Post by: input~2 on 08/02/2016 11:13 AM
Pratham to be launched in September with Scatsat
http://timesofindia.indiatimes.com/city/mumbai/Isro-to-finally-launch-IIT-Bs-satellite-from-Sriharikota-space-centre-in-September/articleshow/53496056.cms
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 2016
Post by: input~2 on 08/02/2016 05:26 PM
Quote
we have another PSLV launch coming up in August [now September] for BlackSky...

source (dated June 21): http://www.spaceflight.com/launch-12-planet-doves-via-pslv-check/ 
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 2016
Post by: input~2 on 08/07/2016 02:54 PM
PSLV C35 to launch "by the second week of September" with Scatsat-1, Pisat, Pratham plus 5 "foreign satellites" (Blacksky Pathfinder-1, Alsat-2B and possibly NLS-19, Alsat-1B an Alsat-1N)
source (http://www.andhrabhoomi.net/content/state-3534)
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 2016
Post by: Steven Pietrobon on 08/08/2016 05:47 AM
I believe NLS 19 is not a satellite, but refers to Nanosatellite Launch Service, which includes a number of small satellites.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 2016
Post by: Skyrocket on 08/08/2016 06:48 AM
I believe NLS 19 is not a satellite, but refers to Nanosatellite Launch Service, which includes a number of small satellites.

Correct. It might be a single satellite or several satellites. Possibly it is CanX-7.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 2016
Post by: vyoma on 08/13/2016 11:03 PM
ScatSat-1 info.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 2016
Post by: Skyrocket on 08/13/2016 11:49 PM
Alsat-1N (or Alsat Nano) is confirmed to be on this launch
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 2016
Post by: vyoma on 08/16/2016 06:53 PM
http://www.deccanchronicle.com/science/science/160816/new-gslv-launch-in-september.html

Quote
The Polar Satellite Launch Vehicle (PSLV-C35) mission is scheduled between September and November. It will launch ResourceSat 2A satellite into a low-Earth orbit and ScatSat 1 satellite into higher geostationary orbit besides two satellites developed by students and four international satellites.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 2016
Post by: vineethgk on 08/17/2016 01:37 PM
http://www.deccanchronicle.com/science/science/160816/new-gslv-launch-in-september.html

Quote
The Polar Satellite Launch Vehicle (PSLV-C35) mission is scheduled between September and November. It will launch ResourceSat 2A satellite into a low-Earth orbit and ScatSat 1 satellite into higher geostationary orbit besides two satellites developed by students and four international satellites.
I guess the reference to GEO for Scatsat is a typo. It should be SSO as the slide posted above indicates.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - October 2016
Post by: tehwkd on 08/21/2016 01:14 PM
September 2016

http://www.indiatimes.com/lifestyle/technology/isro-to-launch-aditya-l1-to-study-the-sun-by-the-year-2020_-260334.html
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 2016
Post by: input~2 on 08/25/2016 09:31 AM
Launch now planned for September 26
source (http://www.thehindu.com/sci-tech/airbreather-propulsion-test-on-aug-28-isro/article9027578.ece)
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 2016
Post by: vyoma on 08/27/2016 07:49 PM
http://www.ndtv.com/india-news/isro-to-test-scramjet-engine-on-sunday-1451043

Quote
According to officials, the ISRO will launch ScatSat -- a weather monitoring and forecasting satellite -- with polar satellite launch vehicle (PSLV) end of next month.

The Indian satellite will be a co-passenger to an Algerian satellite.

Both the satellites will be put into different orbits. So the fourth engine of the rocket will be switched off after ejecting ScatSat first. Then after a gap of around 30 minutes, the engine will be switched on and put the Algerian satellite into its intended orbit.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 2016
Post by: chewi on 08/30/2016 06:42 AM
September 28 is mentioned here:
http://timesofindia.indiatimes.com/city/thiruvananthapuram/Preparations-on-for-launch-of-GSLV-Mark-II/articleshow/53917788.cms
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 2016
Post by: vyoma on 09/01/2016 10:20 PM
http://www.isro.gov.in/pslv-c35-scatsat-1

Quote
PSLV-C35 / SCATSAT-1

SCATSAT-1 is a continuity mission for Oceansat-2 Scatterometer to provide wind vector data products for weather forecasting, cyclone detection and tracking services to the users. The satellite carries Ku-band scatterometer similar to the one flown onboard Oceansat-2.  The spacecraft is built around standard IMS-2 Bus and the mass of the spacecraft is 360 kg. The spacecraft will be put in SSP orbit of 720 km altitude with an inclination of 98.27 deg by PSLV-C35. The mission life of the satellite is 5 years.

The satellite is scheduled for launch during Second Half of September, 2016 onboard PSLV-C35 from SDSC SHAR , Sriharikota.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 2016
Post by: vyoma on 09/02/2016 02:45 AM
http://www.thehindu.com/todays-paper/tp-national/tp-karnataka/six-foreign-satellites-to-be-launched-with-scattsat1-this-monthend/article9062757.ece

Quote
Six small commercial satellites of foreign customers are slated to be launched this month-end along with the ocean data gleaning Scattsat-1. ISRO Chairman A.S. Kiran Kumar said Algerian satellites and three others would be launched on the PSLV.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 2016
Post by: Ohsin on 09/04/2016 08:30 AM
Scatsat-1 flag off from ISAC. DLA-U hitching a ride!
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 2016
Post by: vyoma on 09/12/2016 01:23 AM
http://www.isac.gov.in/flagoff-studentsat.jsp

Quote
Students satellites, PISAT and PRATHAM, flagged off from ISRO Satellite Centre,Bengaluru on 11-Sep-2016
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 2016
Post by: input~2 on 09/12/2016 05:05 PM
Here it says launch on September 30
http://www.andhrabhoomi.net/content/nation-1149
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 -30 2016
Post by: input~2 on 09/12/2016 05:22 PM
CanX-7 went through Indian customs on Sept 8 from Canada at Chennai air cargo
Alsat-1N on Sept 2 from UK at Chennai air cargo
Alsat-1B on Sept 2 from UK at Chennai air cargo

So the final list of satellites onboard would be:
Scatsat-1, Alsat-2B, Pathfinder-1, Alsat-1N, Alsat-1B, CanX-7, Pratham, Pisat
 
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 -30 2016
Post by: vineethgk on 09/12/2016 05:44 PM
Considering the lower weight of the satellites, would this launch use a PSLV-CA configuration?
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 -30 2016
Post by: cbing92 on 09/12/2016 10:20 PM
CanX-7 went through Indian customs on Sept 8 from Canada at Chennai air cargo
Alsat-1N on Sept 2 from UK at Chennai air cargo
Alsat-1B on Sept 2 from UK at Chennai air cargo

So the final list of satellites onboard would be:
Scatsat-1, Alsat-2B, Pathfinder-1, Alsat-1N, Alsat-1B, CanX-7, Pratham, Pisat

Seems, Alsat-2B passed through long back on June 29. And, Pathfinder-1 comes with a lot of associated parts like even computer monitors, security cameras, administrative supplies. Why so specific to send even administrative supplies from the US?

https://www.zauba.com/import-pathfinder/unit-NOS-hs-code.html
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 - 30 2016
Post by: Steven Pietrobon on 09/13/2016 08:05 AM
So the two PlanetiQ satellites, Max Valier Sat and Venta 1 are not flying on C35?
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 - 30 2016
Post by: isro-watch on 09/13/2016 11:19 PM
So the two PlanetiQ satellites, Max Valier Sat and Venta 1 are not flying on C35?

Going by the information on PlanetiQ website, I suppose, they are targeting a end-fall/early-2017 timeframe...which I suppose gels well with Resourcesat-2A launch on the next PSLV.

http://satmaxvalier.it/ counts down to 17 days as of now. Not sure, if that means a launch on PSLV-C35.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 2016
Post by: input~2 on 09/15/2016 07:53 AM
Launch date: Sept 26
Launch time: 04:00 UTC
source: http://timesofindia.indiatimes.com/city/mumbai/IIT-Bs-feat-Mumbais-first-satellite-to-lift-off-on-September-26/articleshow/54337045.cms
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 2016
Post by: input~2 on 09/19/2016 09:35 AM
A1964/16 -  PSLV-C35 ROCKET LAUNCH FM SHAR RANGE, SRIHARIKOTA WILL TAKEPLACE AS PER FLW DETAILS. THE LAUNCH WILL BE ON ANY ONE OF THE DAY DRG THIS PERIOD.ACTUAL DATE OF LAUNCH WILL BE INTIMATED 24HR IN ADVANCE THROUGH A SEPERATE NOTAM. LAUNCH PAD COORD: 1343.9N08014.2E NO FLT IS PERMITTED OVER THE DNG ZONE. A.DNG ZONE-1 IS A CIRCLE OF 10NM AROUND THE LAUNCHER B.DNG ZONE-2 IS A SECT BTN 20NM AND 60NM FM LAUNCHPAD AND BTN AZIMUTH ANGLES OF 130DEG AND 150DEG FM TRUE NORTH. C.DNG ZONE-3 IS A RECTANGULAR AREA BOUNDED BY: 1205N08110E 1230N08135E 1130N08220E 1105N08155E D.DNG ZONE-4 IS A RECTANGULAR AREA BOUNDED BY: 1040N08215E 1100N08240E 1015N08315E 0955N08250E E.DNG ZONE-5 IS A RECTANGULAR AREA BOUNDED BY: 0835N08320E 0835N08350E 0745N08350E 0745N08320E F.DNG ZONE-6 IS A RECTANGULAR AREA BOUNDED BY: 0455S08145E 0510S08255E 0755S08215E 0740S08105E G.DNG ZONE-7 IS A RECTANGULAR AREA BOUNDED BY: 5540S06830E 5625S07120E 6420S06740E 6355S06450E ROUTES AFFECTED IN CHENNAI FIR: W20,A465,,P761,P574,B466,L896,N563,N564, Q10,Q11,Q23,Q24,V3,V4,V6,V8,V9 V11 AND T3 CLOSURE/ALTN ROUTINGS 1)P761 NOT AVBL BTN MMV VOR AND IDASO ALTN RTE: MMV VOR-DCT-PT A 1228N08042E DCT PT B 1254N08138E-DCT IDASO(BIDIRECTIONAL) 2)W20 NOT AVBL BTN MMV VOR AND BODEL ALTN RTE: MMV VOR-TR319/139DEG-53NM-TTPVOR TR357/177DEG-81NM-BODEL(BIDIRECTIONAL) 3)A465 NOT //PART 1 OF 2 PARTS//. BTN 0330-0730, 26 SEP 03:30 2016 UNTIL 25 OCT 07:30 2016. CREATED: 16 SEP 07:03 2016
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 2016 0350 UTC
Post by: input~2 on 09/20/2016 04:54 PM
Launch planned at 03:50 UTC (9:20 am IST) on September 26 according to
http://www.andhrabhoomi.net/content/ap-1843
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 2016 03:50 UTC
Post by: vineethgk on 09/20/2016 05:16 PM
A1964/16 -  PSLV-C35 ROCKET LAUNCH FM SHAR RANGE, SRIHARIKOTA WILL TAKEPLACE AS PER FLW DETAILS. THE LAUNCH WILL BE ON ANY ONE OF THE DAY DRG THIS PERIOD.ACTUAL DATE OF LAUNCH WILL BE INTIMATED 24HR IN ADVANCE THROUGH A SEPERATE NOTAM. LAUNCH PAD COORD: 1343.9N08014.2E NO FLT IS PERMITTED OVER THE DNG ZONE. A.DNG ZONE-1 IS A CIRCLE OF 10NM AROUND THE LAUNCHER B.DNG ZONE-2 IS A SECT BTN 20NM AND 60NM FM LAUNCHPAD AND BTN AZIMUTH ANGLES OF 130DEG AND 150DEG FM TRUE NORTH. C.DNG ZONE-3 IS A RECTANGULAR AREA BOUNDED BY: 1205N08110E 1230N08135E 1130N08220E 1105N08155E D.DNG ZONE-4 IS A RECTANGULAR AREA BOUNDED BY: 1040N08215E 1100N08240E 1015N08315E 0955N08250E E.DNG ZONE-5 IS A RECTANGULAR AREA BOUNDED BY: 0835N08320E 0835N08350E 0745N08350E 0745N08320E F.DNG ZONE-6 IS A RECTANGULAR AREA BOUNDED BY: 0455S08145E 0510S08255E 0755S08215E 0740S08105E G.DNG ZONE-7 IS A RECTANGULAR AREA BOUNDED BY: 5540S06830E 5625S07120E 6420S06740E 6355S06450E ROUTES AFFECTED IN CHENNAI FIR: W20,A465,,P761,P574,B466,L896,N563,N564, Q10,Q11,Q23,Q24,V3,V4,V6,V8,V9 V11 AND T3 CLOSURE/ALTN ROUTINGS 1)P761 NOT AVBL BTN MMV VOR AND IDASO ALTN RTE: MMV VOR-DCT-PT A 1228N08042E DCT PT B 1254N08138E-DCT IDASO(BIDIRECTIONAL) 2)W20 NOT AVBL BTN MMV VOR AND BODEL ALTN RTE: MMV VOR-TR319/139DEG-53NM-TTPVOR TR357/177DEG-81NM-BODEL(BIDIRECTIONAL) 3)A465 NOT //PART 1 OF 2 PARTS//. BTN 0330-0730, 26 SEP 03:30 2016 UNTIL 25 OCT 07:30 2016. CREATED: 16 SEP 07:03 2016
Is it usual for the last drop zone to be so far south? Has it got something to do with a late ignition of 3rd stage in this mission?

EDIT: Or are they attempting a 4th stage deorbit this time?
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 2016 03:50 UTC
Post by: vyoma on 09/20/2016 07:10 PM

EDIT: Or are they attempting a 4th stage deorbit this time?

Not sure about deorbit; but this time 4th stage is going to be restarted to place payloads in different orbits.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 2016 03:50 UTC
Post by: vyoma on 09/21/2016 02:35 AM
http://www.deccanchronicle.com/science/science/210916/isros-multi-orbit-launch-on-anvil.html

Quote
The rocket will first place the 370-kg ScatSat-1, a weather satellite to watch for cyclones, in orbit 720 km above the earth. About an hour and 20 minutes later, it will inject seven smaller satellites into an orbit 670 km above the earth. Among the seven are two satellites, one of them from IIT-B, and five belonging to international customers including the US

Quote
To achieve this, the fourth stage of the rocket will be ignited twice. The maximum time Isro has taken for any launch is about 20 minutes after launch. Monday’s mission will last 2 hours and 15 minutes.

Quote
Satish Dhawan Space Centre director P. Kunhi Krishnan said the ScatSat-1 will be separated within 17 minutes of launch, after the fourth stage is shut off. The stage will be ignited briefly after 1 hour and 22 minutes and stopped. It will be started again about 40 minutes later, and the last satellite will be placed in orbit about 2 hours and 15 minutes after launch.

Quote
“We have demonstrated the fourth stage engine restart capability. The fourth stage was restarted once in case of PSLV C-29 and twice with respect to PSLV-C34” Mr Kunhi Krishnan told this newspaper.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 2016 03:50 UTC
Post by: vyoma on 09/21/2016 06:04 AM
Mission page is up:
http://isro.gov.in/launcher/pslv-c35-scatsat-1
http://isro.gov.in/Spacecraft/scatsat-1

Quote
PSLV-C35 / SCATSAT-1
PSLV-C35

India’s Polar Satellite Launch Vehicle, in its thirty-seventh flight (PSLV-C35), will launch the 377 kg SCATSAT-1 for ocean and weather related studies and seven co-passenger satellites into polar Sun Synchronous Orbit (SSO). Co-passenger satellites are from Algeria, Canada and USA as well as two satellites from Indian Universities/ Academic Institute.

SCATSAT-1 will be placed into a 720 km Polar SSO whereas; the two Universities/ Academic Institute Satellites and the five foreign satellites will be placed into a 670 km polar orbit. This is the first mission of PSLV in which it will be launching its payloads into two different orbits.

PSLV-C35 will be launched from the First Launch Pad (FLP) of Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota. It will be the fifteenth flight of PSLV in ‘XL’ configuration (with the use of solid strap-on motors).

The PSLV-C35 is scheduled to be launched on Monday morning at 9:12 hrs (IST) on September 26, 2016 from SDSC SHAR , Sriharikota.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26 2016 03:50 UTC
Post by: vineethgk on 09/21/2016 06:50 AM
I wonder why this mission uses the XL configuration. Does the combined payloads weigh more than 1000 kg?
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Ohsin on 09/21/2016 09:38 AM
Those are not PSOMs of XL variety..
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vineethgk on 09/21/2016 10:26 AM
Strange. Are these the old S-9 strapons? Or have they redesigned the S-12 to make it shorter?

EDIT: Are we seeing the return of standard PSLV configuration (PSLV-G??) after a long period of time? When was it launched last - C7/Cartosat-2 in 2007 or C16/Resourcesat-2 in 2011?
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: cbing92 on 09/21/2016 01:06 PM
Strange. Are these the old S-9 strapons? Or have they redesigned the S-12 to make it shorter?

EDIT: Are we seeing the return of standard PSLV configuration (PSLV-G??) after a long period of time? When was it launched last - C7/Cartosat-2 in 2007 or C16/Resourcesat-2 in 2011?

The last PSLV-G launch was PSLV C16 carrying Resourcesat-2 on 20 April 2011.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Skyrocket on 09/21/2016 01:39 PM
Yes, this is clearly a PSLV-G version.

For a complete flight history of PSLV see here: http://space.skyrocket.de/doc_lau/pslv.htm
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/21/2016 01:40 PM
Strange. Are these the old S-9 strapons? Or have they redesigned the S-12 to make it shorter?

EDIT: Are we seeing the return of standard PSLV configuration (PSLV-G??) after a long period of time? When was it launched last - C7/Cartosat-2 in 2007 or C16/Resourcesat-2 in 2011?

The strap-on boosters looked shorter because they did not have their nose cones on yet.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vineethgk on 09/21/2016 01:50 PM
Strange. Are these the old S-9 strapons? Or have they redesigned the S-12 to make it shorter?

EDIT: Are we seeing the return of standard PSLV configuration (PSLV-G??) after a long period of time? When was it launched last - C7/Cartosat-2 in 2007 or C16/Resourcesat-2 in 2011?

The strap-on boosters looked shorter because they did not have their nose cones on yet.
Nope. Take a look at the strapons of PSLV-XL in the previous launch.

http://forum.nasaspaceflight.com/index.php?topic=39448.msg1549125.msg#1549125
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: isro-watch on 09/21/2016 04:59 PM
Notice that the ISRO website mentions it is as a XL launch vehicle.

But, I m completely surprised and cannot make out why an XL is used. The weight of satellites is almost equal to the last CA version launch for Singaporean satellites.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Skyrocket on 09/21/2016 06:32 PM
Notice that the ISRO website mentions it is as a XL launch vehicle.

But the images prove this to be incorrect

But, I m completely surprised and cannot make out why an XL is used. The weight of satellites is almost equal to the last CA version launch for Singaporean satellites.

A CA should be enough for the weight - but i think this time a dual launch structure is also flown, so we have a greater launch mass than in the Singaporean mission, which might push it over the CA limit.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: isro-watch on 09/21/2016 06:45 PM
Yeah, you are correct.
If I zoom into the image, the strapon is named as PSOM unlike XL version strap ons which have always been named as PSOMXL .
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Stan Black on 09/21/2016 08:30 PM
Notice that the ISRO website mentions it is as a XL launch vehicle.

But the images prove this to be incorrect

But, I m completely surprised and cannot make out why an XL is used. The weight of satellites is almost equal to the last CA version launch for Singaporean satellites.

A CA should be enough for the weight - but i think this time a dual launch structure is also flown, so we have a greater launch mass than in the Singaporean mission, which might push it over the CA limit.

Quote
Currently, two versions of PSLV are operational, namely PSLV-XL (with six extended version of Strap-on motors) and the PSLV Core-alone (without Strap-on motors).
http://www.isro.gov.in/sites/default/files/article-files/budget-accounts/outcomebudget2016-2017.pdf
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Skyrocket on 09/21/2016 10:26 PM
Notice that the ISRO website mentions it is as a XL launch vehicle.

But the images prove this to be incorrect

But, I m completely surprised and cannot make out why an XL is used. The weight of satellites is almost equal to the last CA version launch for Singaporean satellites.

A CA should be enough for the weight - but i think this time a dual launch structure is also flown, so we have a greater launch mass than in the Singaporean mission, which might push it over the CA limit.

Quote
Currently, two versions of PSLV are operational, namely PSLV-XL (with six extended version of Strap-on motors) and the PSLV Core-alone (without Strap-on motors).
http://www.isro.gov.in/sites/default/files/article-files/budget-accounts/outcomebudget2016-2017.pdf

Yes, i know that. But apparently it is not correct.

Or it means, that this is valid for future missions and the C35 simply uses up already existing resources.

Or the images are not from the upcoming launch.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/22/2016 04:44 AM
Or the images are not from the upcoming launch.

The images EXIF information shows that is not the case.

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ImageLength - 7360
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Make - NIKON CORPORATION
Model - NIKON D800E
Orientation - Top left
SamplesPerPixel - 3
XResolution - 300
YResolution - 300
ResolutionUnit - Inch
Software - Adobe Photoshop CS5.1 Windows
DateTime - 2016:09:02 15:10:15
YCbCrPositioning - Co-Sited
ExifOffset - 314
ExposureTime - 1/60 seconds
FNumber - 13.00
ExposureProgram - Manual control
ISOSpeedRatings - 100
ExifVersion - 0230
DateTimeOriginal - 2016:09:02 11:10:23
DateTimeDigitized - 2016:09:02 11:10:23
ComponentsConfiguration - YCbCr
CompressedBitsPerPixel - 4 (bits/pixel)
ShutterSpeedValue - 1/60 seconds
ApertureValue - F 13.00
ExposureBiasValue - -0.67
MaxApertureValue - F 4.76
SubjectDistance - 0.05 m
MeteringMode - Multi-segment
LightSource - Auto
Flash - Flash not fired, compulsory flash mode
FocalLength - 62.00 mm
UserComment -
SubsecTime - 30
SubsecTimeOriginal - 30
SubsecTimeDigitized - 30
FlashPixVersion - 0100
ColorSpace - sRGB
ExifImageWidth - 4912
ExifImageHeight - 7360
InteroperabilityOffset - 1010
SensingMethod - One-chip color area sensor
FileSource - Other
SceneType - Other
CustomRendered - Normal process
ExposureMode - Manual
White Balance - Auto
DigitalZoomRatio - 1 x
FocalLengthIn35mmFilm - 62 mm
SceneCaptureType - Standard
GainControl - None
Contrast - Normal
Saturation - Normal
Sharpness - Normal
SubjectDistanceRange - Unknown

GPS information: -
GPSVersionID - 2.3.0.0

Thumbnail: -
XResolution - 72
YResolution - 72
ResolutionUnit - Inch
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vineethgk on 09/22/2016 01:45 PM
Sept. 26 PSLV launch to be doubly special (http://m.thehindu.com/news/national//article9132666.ece)

Quote
On September 26, the PSLV satellite launcher will for the first time place its multiple passengers in two different orbits.
The flight is also significant as it will last two hours and 15 minutes, making it the PSLV’s longest ever.
Quote
Only the main passenger, ISRO’s 370-kg Scatsat-1 ocean and weather tracker, will get off first at a slightly higher orbit at 720 km. It will be out in the first 17 minutes, as is customary.
The remaining smaller satellites, weighing between 5 kg and 110 kg, will be ejected at 670 km — but after about two hours.
To make this possible, launch team engineers will shut down and restart the fourth and last stage of the vehicle (called PS4) twice during the flight, according to two senior officials in the know.
Quote
About the spacecraft
Scatsat-1 370 kg [Indian; main payload]
Alsat-1B 103 kg
Alsat-2B 110 kg
Alsat Nano 7 kg
[All 3 Algerian earth observation satellites]
Pathfinder-1 44 kg [BlackSky, U.S.]
NLS-19 8 kg [University of Toronto, Canada]
PISat 5.7 kg [Student sat from PESIT Bengaluru]
Pratham 10 kg [IIT-Bombay's Dept of Aerospace Engg]

If I haven't missed anything, the total payload mass excluding DLA comes to around 658 kg.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: William Graham on 09/22/2016 06:37 PM
Strange. Are these the old S-9 strapons? Or have they redesigned the S-12 to make it shorter?

EDIT: Are we seeing the return of standard PSLV configuration (PSLV-G??) after a long period of time? When was it launched last - C7/Cartosat-2 in 2007 or C16/Resourcesat-2 in 2011?

The strap-on boosters looked shorter because they did not have their nose cones on yet.

ISRO's gallery for the AstroSat mission has an image of an XL in a similar state of assembly. Note how much further the boosters come up the vehicle before they start to taper.

http://www.isro.gov.in/astrosat/astrosat-gallery
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: worldtimedate on 09/22/2016 07:14 PM
Quote

MUMBAI: It promises to be a historical Indian space mission for three reasons on September 26. It will be the first time that a satellite, Pratham, designed and developed by the students of IIT-Bombay will be launched. Second, only 18 days after successfully launching a weather satellite, Insat-3DR, another one, ScatSat-1, will be placed in orbit for the first time.

Third, in its 23-year-old history, it will be the first time that the highly proven four-stage PSLV will be launching satellites into two different orbits. For Monday's flight the launcher will be the advanced version of the PSLV called the PSLV-XL.

According to Isro, while the main satellite, ScatSat-1, will be placed into a 720-km polar sun synchronous orbit, the remaining ones will go into a 670-km polar sun synchronous orbit. For this complex manoeuvre, Isro had earlier carried out a test of successfully shutting down and restarting the fourth stage engine of the PSLV.


Source : Satellite built by IIT-Bombay set for launch (http://timesofindia.indiatimes.com/city/mumbai/Satellite-built-by-IIT-Bombay-set-for-launch/articleshow/54456617.cms)

worldtimedate [ http://www.world-timedate.com/ ]
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: worldtimedate on 09/22/2016 07:45 PM
Here is another report on multiple rocket engine burn technology.

Quote

This is the first mission of PSLV in which it will be launching its payloads into two different orbits.

The multiple burn technology was first tested by ISRO while flying its PSLV rocket on December 16, 2015.


Launching of multiple satellites with a single rocket is nothing new for ISRO and it has been doing that for several years. The challenge, however, is to launch several satellites at different orbits with one rocket.

"Restarting a rocket engine soon after it is shut off is a critical technology that has to be mastered. Once a rocket engine is activated, then the heat generated is very high. The trick is to cool it down in the space and to restart it at a short gap," an industry expert had told IANS.

"This is entirely different from switching on and off the communication satellite's engines in the space. The interval between two restarts of a communication satellite engine will be in days. But in the case of restarting a rocket engine, the time gap will be in hours," the expert added.

"By that time the rocket's engine has to be cooled down. This part of the experiment is very critical," he explained.[/b]


Source : India to launch eight satellites in two different orbits on September 26 (http://timesofindia.indiatimes.com/home/science/India-to-launch-eight-satellites-in-two-different-orbits-on-September-26/articleshow/54464923.cms)

worldtimedate [ http://www.world-timedate.com/ ]
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: worldtimedate on 09/22/2016 08:05 PM
According to this Deccan Chronicle Report, the fourth stage will be cut off after 17 minutes of flight, then it will be restarted twice.

Quote

Satish Dhawan Space Centre director P. Kunhi Krishnan said the ScatSat-1 will be separated within 17 minutes of launch, after the fourth stage is shut off. The stage will be ignited briefly after 1 hour and 22 minutes and stopped. It will be started again about 40 minutes later, and the last satellite will be placed in orbit about 2 hours and 15 minutes after launch.

This multiple rocket engine burn technology was tested in two PSLV Missions before.

Quote
"We have demonstrated the fourth stage engine restart capability. The fourth stage was restarted once in case of PSLV C-29 and twice with respect to PSLV-C34", Mr Kunhi Krishnan told this newspaper.

Source : ISRO’s multi-orbit launch on anvil (http://www.deccanchronicle.com/science/science/210916/isros-multi-orbit-launch-on-anvil.html)

worldtimedate [ http://www.world-timedate.com/ ]
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: m.prasad on 09/23/2016 06:08 AM
Couple of questions:

1. Does any one know weight of new DLA? Older one weighs ~250Kg.

2. Why can't ISRO use PSOM XL strap-ons (12T), in numbers 2, 3, 4, or 5 (without loosing vehicle balance during 1st stage of flight) based on the payload weight, instead of always going with 6 strap-on boosters when payload weight crosses PSLV-CA limit (assuming 9T boosters are retired at this moment) ?

Although cost saving is less, this approach would save few strap-ons for follow on launches. It has some positive impact on the frequency of the launches, which is current limited by manufacturing capacity limits :)

Thx
~Prasad
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: s^3 on 09/23/2016 06:54 AM
3 days to launch SCATSAT....   still no brochure out for launch ;) .
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: K210 on 09/23/2016 07:39 AM
This launch might slip to september 30th
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: input~2 on 09/23/2016 08:17 AM
NOTAM for a Sept 26 launch just out:

A2001/16 -  REF CHENNAI NOTAM A1994/16.PSLV-C35 ROCKET LAUNCH FM SHAR RANGE,SRIHARIKOTA,INDIA IS SCHEDULED ON 26 SEP 2016 BTN 0330-0730UTC.ATC MAY RE-ROUTE TFC DRG THIS PERIOD AS PER THE ROUTINGS GIVEN IN THE ABOVE NOTAM.LAUNCH WINDOW FOR THE REMAINING PERIOD FM 27 SEP 2016 TO 25 OCT 2016 SHALL BE KEPT ALIVE FOR RESCHEDULING OF LAUNCH IF REQUIRED. GND - UNL, 26 SEP 03:30 2016 UNTIL 26 SEP 07:30 2016. CREATED: 23 SEP 05:39 2016

Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vineethgk on 09/23/2016 09:19 AM
Brochure is out!
Source (http://www.isro.gov.in/pslv-c35-scatsat-1/pslv-c35-scatsat-1-gallery)
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/23/2016 09:35 AM
Thanks vineethgk! The Press Kits is showing 6x12.2 for the strap-ons, the same as other PSLV-XL vehicles. Standard PSOMs are 9 t. Of course, this just might be a copy and paste error. The assembly image in the Press Kit does show the shorter PSOMs.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vineethgk on 09/23/2016 12:45 PM
Here we go with the pics. It's a PSLV-G alright. If all goes according to plan, this will be the first timein it's history that ISRO is making two launches in the same calendar month... and the shortest gap between two launches too..
Source (http://www.isro.gov.in/pslv-c35-scatsat-1/pslv-c35-scatsat-1-gallery)
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Galactic Penguin SST on 09/23/2016 01:59 PM
I have checked the brochure and the one for flight C33 (IRNSS-1G) - it looks like all 3 pairs of SRBs separate only 2 seconds earlier this time than in the last -XL flight. Does that sound right for the old G version?
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: s^3 on 09/23/2016 02:18 PM
A simulated launch sequence for next PSLV :

(https://3.bp.blogspot.com/-hMLN7yzvdWQ/V-U319-6u4I/AAAAAAAAB-4/MLRvqkCFvA4ukl4F7eXLGMSrD3c274q3QCLcB/s640/reignition.jpg)

In all viewes the s/c is moving from North to South in front of viewer.

After SCARSAT releaseat 730 kms altitude the Launcher moves towards South pole and traversing half orbit from backside of Globe appears over North Pole when the second ignition takes pl;ace ( using Svalbard station ranging and command ?? ) to reduce the altitude. .
Then after about half orbit when the launcher is over South pole at 689 kms altitude one more ignition is used ( to fine tune launch conditions ?? ) and after shutdown Dual Launch adapter is released and after half a minute remaining satellites are released ( Alsat-1N, NLS 19, Pratham, PiSAT, Alsat-1B, Alsat-2B and Pathfinder-1 .. in that order ) in about 2.3 minutes while the launcher is moving South to North behind the globe in graphic.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vineethgk on 09/23/2016 03:38 PM
Quote
Mission Readiness Review (MRR) committee and Launch Authorisation Board (LAB) have cleared the 48 and half hr countdown of PSLV-35/SCATSAT-1 Mission for Saturday, September 24, 2016 starting at 08:42hr IST and the launch of PSLV-C35 / SCATSAT-1 mission for Monday, September 26, 2016 at 09:12 hr IST

Source (http://www.isro.gov.in/update/23-sep-2016/mission-readiness-review-mrr-committee-and-launch-authorisation-board-lab-have)
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: sanjaykumar on 09/24/2016 04:15 AM

The 48 and half hr countdown activity of PSLV-C35/SCATSAT-1 Mission has started at 08:42 hr IST today, Saturday, September 24, 2016

http://www.isro.gov.in/update/24-sep-2016/48-and-half-hr-countdown-activity-of-pslv-c35-scatsat-1-mission-has-started-0842 (http://www.isro.gov.in/update/24-sep-2016/48-and-half-hr-countdown-activity-of-pslv-c35-scatsat-1-mission-has-started-0842)
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: sanjaykumar on 09/24/2016 10:12 AM

Mono Methyl Hydrazine (MMH) propellant filling operation of fourth stage (PS4) of PSLV-C35 is under progress

MMH Propellant filling operation has been completed by 12:30 hr IST. Preparations for Mixed Oxides of Nitrogen (MON-3) oxidiser filling operation of PS4 are under progress

http://isro.gov.in/update/24-sep-2016/mmh-propellant-filling-operation-has-been-completed-1230-hr-ist-preparations (http://isro.gov.in/update/24-sep-2016/mmh-propellant-filling-operation-has-been-completed-1230-hr-ist-preparations)
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vyoma on 09/24/2016 06:42 PM
Quote
Sep 24, 2016
MMH Propellant filling operation has been completed by 12:30 hr IST. Preparations for Mixed Oxides of Nitrogen (MON-3) oxidiser filling operation of PS4 are under progress

Quote
Sep 24, 2016
Mixed Oxides of Nitrogen (MON-3) oxidiser filling operation of PS4 are under progress

Quote
Sep 24, 2016
MON-3 oxidiser filling operations of PS4 are completed by 18:00 hr IST
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vyoma on 09/24/2016 06:43 PM
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vineethgk on 09/25/2016 11:57 AM
Quote
Mobile Service Tower (MST) withdrawal to parking end is completed. Preparations for propellant filling operation of Second Stage (PS2) are in progress

Source (http://www.isro.gov.in/update/25-sep-2016/mobile-service-tower-mst-withdrawal-to-parking-end-completed-preparations)
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Galactic Penguin SST on 09/25/2016 12:09 PM
Moved for live coverage.
Title: Re: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Ohsin on 09/25/2016 01:00 PM
I have checked the brochure and the one for flight C33 (IRNSS-1G) - it looks like all 3 pairs of SRBs separate only 2 seconds earlier this time than in the last -XL flight. Does that sound right for the old G version?

Yes and this is undoubtedly PSLV-G with its shorter PSOMs and the missing SITVC on PSOM-5 which was a modification on C7 and in place since. PSOMXL have SITVC on 4 and 5 both. But they are calling it XL not only in brochure and mission page but on that 'curtain raiser' video as well...

Live link:

https://www.youtube.com/watch?v=MlhLews6CAI
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: sanjaykumar on 09/25/2016 02:40 PM
N2O4 tank filling of Second Stage (PS2) is under progress

http://isro.gov.in/update/25-sep-2016/n2o4-tank-filling-of-second-stage-ps2-under-progress (http://isro.gov.in/update/25-sep-2016/n2o4-tank-filling-of-second-stage-ps2-under-progress)
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vineethgk on 09/25/2016 06:53 PM
Quote
N2O4 tank filling of Second Stage (PS2) is completed. UH25 tank filling operations of Second Stage (PS2) are under progress
Real time system simulation checks are under progress

Source (http://www.isro.gov.in/update/25-sep-2016/real-time-system-simulation-checks-are-under-progress)
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Chris Bergin on 09/25/2016 09:35 PM
Very long preview article by William Graham!
https://www.nasaspaceflight.com/2016/09/isro-pslv-scatsat-1-launch/
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: sanjaykumar on 09/25/2016 10:10 PM
Real time system simulation checks are under progress

http://isro.gov.in/update/25-sep-2016/real-time-system-simulation-checks-are-under-progress (http://isro.gov.in/update/25-sep-2016/real-time-system-simulation-checks-are-under-progress)
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 01:12 AM
L-2 hours, 30 minutes.

Prop loading of the second stage is complete. This stage uses dinitrogen tetroxide (N2O4) as an oxidizer and UH 25, containing 25% hydrazine hydrate and 75% unsymmetrical dimethylhydrazine (UDMH), as the fuel.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 01:42 AM
L-2 hours.

Realtime telemetry and data transmission checks are complete. The PSLV has also gone through its internal checks.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 02:41 AM
About thirty minutes until the YouTube webcast starts.

And about one hour until T0.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 02:58 AM
Webcast is running right now.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vyoma on 09/26/2016 02:59 AM
Livestream links:

https://www.youtube.com/watch?v=MlhLews6CAI

https://www.youtube.com/watch?v=k_MsylwiwWM
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:00 AM
Video coverage has started. Showing Scatsat 1 promo.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:02 AM
L-40 minutes and counting.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:04 AM
Payloads.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:05 AM
SCATSAT 1's orbit will be 720 kilometers high inclined 98.1 degrees.

The other seven payloads' orbit will be 670 kilometers high inclined 98.21 degrees.

All eight will be sun-synchronous.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:06 AM
Payload promo is over and the official launch coverage has begun.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:07 AM
There it is!
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:08 AM
Showing interior of the Mission Control Center.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:08 AM
Our commentators.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vyoma on 09/26/2016 03:08 AM
Generic strapon motors, and not XL strapon motors.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:08 AM
The total payload mass is 682.8 kilograms.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:09 AM
Control Room.

T-34 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:10 AM
L-32 minutes.

Currently, we're green board at the present time; no weather or technical issues are being discussed.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:11 AM
Closeup of the PSOMs.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:13 AM
T-30 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:14 AM
Launch Campaign now being displayed to us.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:15 AM
L-27 minutes.

Everything still looking good for launch at 03:42 UTC (9:12 AM Indian Standard Time).

Total PSLV liftoff weight is 294 tonnes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:15 AM
PSLV launch vehicle construction video being shown.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:16 AM
Like the Space Shuttle Solid Rocket Booster, the PSLV first stage is stacked in segments.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:18 AM
PSLV is slightly similar to the Delta II because it uses strap-on solid motors and uses different types of fuel for each of the four stages (exception is the first and third stages, which are both solid-fueled; the second and fourth stages use two different types of hypergolic fuels).
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:20 AM
B. Jayakumar is the launch director for tonight's mission.

L-21 minutes, 30 seconds.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:21 AM
Integration of vehicle and payloads.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:22 AM
L-20 minutes.

The Terminal Count should start in about six minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:24 AM
Once it reaches orbit, SCATSAT 1 will serve as a gapfiller for Oceansat 2 until the Oceansat 3 series starts launching between 2018 and 2020.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Chris Bergin on 09/26/2016 03:25 AM
There's the LV.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:26 AM
Ding Dong. T-20 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:26 AM
There's the launch authorization key.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:26 AM
Launch authorisation key.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:27 AM
Waiting for authorisation.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:28 AM
T-14 minutes.

The Terminal Count has begun starting up. This procedure will be completed in two minutes.

And the launch authorization key has been wound.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Chris Bergin on 09/26/2016 03:28 AM
Turned the rocket on ;)
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:28 AM
T-15 minutes. Launch authorised.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:29 AM
T-14 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:29 AM
Showing Scatsat 1 promo.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:30 AM
T-12 minutes.

Terminal Count is fully engaged.

And another SCATSAT 1 promo is being played.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:31 AM
T-12 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:32 AM
T-10 minutes.

At liftoff, the PSLV-G (3) rocket will produce 1,494,258 pounds of thrust thanks to the four ground-lit solid motors and the first stage motor.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:32 AM
T-11 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:33 AM
T-10 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:34 AM
T-8 minutes.

This will mark the 6th launch of the PSLV-G (3) variant and the 37th PSLV mission since its debut in 1993. The previous two PSLV-G variants flew three times each in the 1990s and early 2000s.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:34 AM
T-9 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:35 AM
T-7 minutes.

I'm guessing that this was the same promo shown before the actual launch coverage.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:35 AM
T-8 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:36 AM
T-7 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:37 AM
T-5 minutes.

The ignition sequence will include the following events:

At T-3.9 seconds, the first stage's Roll Control Thrusters will ignite.
At T0, the hold-down bolts will be released.
At T+0.05 seconds, the first stage motor will ignite.
At T+0.85 seconds, the four ground-lit solid motors will ignite.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:37 AM
T-6 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:38 AM
T-5 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:38 AM
T-4 minutes. Range is GO along with the weather conditions.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:39 AM
T-4 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:39 AM
T-3 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:40 AM
T-3 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Chris Bergin on 09/26/2016 03:40 AM
T-2 mins!
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:40 AM
T-90 seconds.

First stage igniters are armed.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:41 AM
T-2 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:41 AM
T-51 seconds. All 6 solid motors' igniters are armed.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Chris Bergin on 09/26/2016 03:41 AM
60 seconds.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:41 AM
T-30 seconds. Go PSLV, Go SCATSAT 1, Go Secondary Payloads.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:42 AM
Stand by for final countdown. T-15.

T-10, 9, 8, 7, 6, 5, RCT startup, 2, 1, 0, and liftoff of the SCATSAT 1 satellite and seven secondary payloads on a multinational mission to grow reliability for the weather forecasters and form numerous partnerships with the commercial sectors.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:42 AM
Ding Dong. T-1 minute.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:42 AM
T+11 seconds. PSLV has cleared the First Launch Pad. Roll and pitch programs have begun on time. All four ground-lits burning symmetrically.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:42 AM
T+20 seconds. Roll is complete.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:42 AM
T+26 seconds. We have ignition of both air-lit solid motors. First stage is still burning well.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Chris Bergin on 09/26/2016 03:43 AM
LAUNCH!
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:43 AM
T+35 seconds. Mach 1. PSLV now entering the Max-Q region.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:43 AM
T+44 seconds. We have burnout of all four ground-lit motors. We'll hold on to those for another 24.58 seconds before jettison.

T+50 seconds. Air-lit solids continue to burn very well. We're out of the Max-Q area with little attitude disturbances.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:43 AM
T+1 minute, 10 seconds. We have good separation of all four ground-lit solids. And both air-lit solids have burned out. Waiting for air-lit motor jettison in 20 seconds.

T+1 minute, 20 seconds. First stage beginning to taper off gradually. Still burning well.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Chris Bergin on 09/26/2016 03:43 AM
Air lits on.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:44 AM
T+1 minute, 30 seconds. Both air-lit motors have separated. The first stage will burn out at 1 minute, 49 seconds. Stage separation will occur 4 seconds later followed by second stage ignition 0.6 seconds afterwards.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:44 AM
T+1 minute, 50 seconds. First stage burnout. And the second stage has separated and ignited with full thrust. Second stage will burn for 2 minutes and 33.6 seconds.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Chris Bergin on 09/26/2016 03:44 AM
Solids jettison.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:44 AM
T+1 minute.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:44 AM
T+2 minutes, 9 seconds. Vehicle now out of the lower atmosphere; looking for heat shield jettison at 2 minutes, 38 seconds.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Chris Bergin on 09/26/2016 03:44 AM
Staging 1-2.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:44 AM
T+2 minutes, 20 seconds. Pressures look good in the second stage with nominal vehicle attitude.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:45 AM
T+2 minutes, 40 seconds. Heat shield separation. The eight payloads are now exposed to the vacuum of space for the first time.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:45 AM
T+2 minutes. 2nd stage ignition.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:45 AM
T+3 minutes, 11 seconds. Nominal flight so far.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:45 AM
T+3 minutes, 40 seconds. SECO will occur at 4 minutes, 27.2 seconds. Third stage separation occurs 5.1 seconds later followed by ignition 1.2 seconds afterwards.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:46 AM
Heat shield separation. T+3 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:46 AM
T+4 minutes, 25 seconds. Second stage engine shutdown. We have third stage sep. Third stage TVC battery is on. Ignition and full thrust. Third stage will burn for 1 minute and 52 seconds.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:47 AM
T+4 minutes, 46 seconds. PSLV continues to stay on course and on track.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:47 AM
T+4 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:47 AM
T+5 minutes, 19 seconds.

Third stage burnout will occur at 6 minutes, 25.5 seconds. Fourth stage separates 3 minutes and 22.3 seconds later. And the fourth stage ignites 2 minutes and 38.72 seconds after separation. So, there's two short coast phases between those events.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:48 AM
T+5 minutes, 50 seconds. Third stage continues to burn very well.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:48 AM
T+5 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:48 AM
T+6 minutes, 14 seconds. Third stage tailing off now.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:49 AM
T+6 minutes, 29 seconds. Third stage burnout.

The two coast phases mentioned above will allow PSLV to soar to its apogee so that the fourth stage can circularize the preliminary orbit during its first burn.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:49 AM
T+6 minutes, 57 seconds. About three minutes from fourth stage separation.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:49 AM
T+6 minutes. Where has Sri Lanka gone?
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:49 AM
T+7 minutes, 31 seconds. Telemetry still looks good. Attitude is healthy.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:50 AM
T+7 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:50 AM
T+8 minutes, 10 seconds.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:51 AM
T+9 minutes. Very quiet in the Mission Control Room at this time.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:51 AM
T+8 minutes. In coast phase.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:52 AM
T+9 minutes, 50 seconds. Fourth stage jettison confirmed.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:52 AM
T+9 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Chris Bergin on 09/26/2016 03:52 AM
Applause as they head into the upper stage burns
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:53 AM
T+10 minutes, 30 seconds. Good coast phase so far.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:53 AM
PS3 separation.

T+10 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:54 AM
T+11 minutes, 37 seconds. Obvious dogleg maneuver on the telemetry.

The fourth stage tanks contain monomethylhydrazine (MMH) as the fuel and mixed oxides of nitrogen (MON) as the oxidizer.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:54 AM
T+11 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:55 AM
T+12 minutes, 27 seconds. Fourth stage ignition. This stage's first burn is the longest of the three firings, burning for 4 minutes and 29.32 seconds.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:55 AM
T+12 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Chris Bergin on 09/26/2016 03:55 AM
Fourth stage has ignited.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:56 AM
T+13 minutes, 9 seconds.

Fourth stage performance looking good.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:56 AM
PS4 1st ignition!

T+13 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:57 AM
T+14 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:57 AM
T+15 minutes. Not much to report here.

All parameters nominal.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:58 AM
Next major event will be the first cutoff of the fourth stage at 16 minutes and 56 seconds MET.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:58 AM
T+15 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:59 AM
T+16 minutes, 56 seconds.

Fourth stage cutoff confirmed. SCATSAT 1 separation in 37 seconds.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 03:59 AM
T+16 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 03:59 AM
T+17 minutes, 33 seconds.

We have two breakwires and SCATSAT 1 separation! But, the mission ain't over yet! The fourth stage has two more burns to be performed and seven more payloads to release.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 04:00 AM
T+17 minutes. PS4 1st cutoff!
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 04:01 AM
Scatsat 1 separation!
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 04:01 AM
T+19 minutes.

We'll now take a commercial break. Don't go away; we'll be right back.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Chris Bergin on 09/26/2016 04:01 AM
So that's the primary passenger on its way!
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 04:02 AM
Coverage returning at 11:15 IST (0545 UTC). This is before PS4 third ignition followed by remaining spacecraft separation.

    T+       UTC
2:11:47  5:53 PS4 3rd ignition
2:12:06  5:54 PS4 3rd cutoff
2:12:43  5:54 Adapter separation
2:13:13  5:55 Alsat 1N separaton
2:13:23  5:55 CanX-7 separation
2:14:43  5:56 Pratham separation
2:14:53  5:56 PISAT separation
2:15:03  5:57 Alsat 1B separation
2:15:18  5:57 Alsat 2B separation
2:15:33  5:57 Pathfinder 1 separation
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Chris Bergin on 09/26/2016 04:02 AM
Current status:
https://www.nasaspaceflight.com/2016/09/isro-pslv-scatsat-1-launch/

Will update it when I get up for the additional passengers.

Thanks again to Steven and Zach for the excellent coverage!
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: isro-watch on 09/26/2016 04:02 AM
In hindi version of announcements, the vehicle velocity at trust cut-off was mentioned as 7.546 Km/sec
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 04:05 AM
Where I live, at the University of Arkansas, the coverage will resume at 12:45 AM Central Time.

23 minutes Mission Elapsed Time.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 04:11 AM
While it's the final orbit for SCATSAT 1, the other seven cubesats are in their preliminary parking orbit of 720 kilometers inclined 98.1 degrees to either side of the Equator. That will change the next 53 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Mapperuo on 09/26/2016 04:14 AM
https://www.youtube.com/watch?v=ByxQKX870bA
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 04:25 AM
The YouTube links are now showing replays. In case there is no YouTube coverage, here is the direct Doordarshan News link, but the quality is usually poor.

http://webcast.gov.in/live/

Here is the link to the ISRO web page. They are just showing a static image at the moment.

http://www.isro.gov.in/pslv-c35-scatsat-1/pslv-c35-scatsat-1-mission

Here is a live link to Doordarshan News on YouTube. Not sure if they'll cover the separation and speeches.

https://www.youtube.com/watch?v=ZbzMHqEi34A
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 04:30 AM
T+48 minutes, 10 seconds.

Next major event will be the second startup of the fourth stage at T+1 hour, 22 minutes, and 38 seconds.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 04:43 AM
We've now passed the 60-minute mark in the mission.

Still looking good.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Ohsin on 09/26/2016 04:58 AM
DD Podhigai Live here.

http://www.ddpodhigai.org.in/live.html
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 05:00 AM
Under four minutes until the second burn of the fourth stage.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 05:04 AM
T+1 hour, 22 minutes, 38 seconds.

Fourth stage has restarted. This second burn will last 20.54 seconds.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 05:05 AM
T+1 hour, 22 minutes, 59 seconds.

 Fourth stage cutoff confirmed. The vehicle will now enter a final coast phase before the third burn begins.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 05:23 AM
T+1 hour, 41 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 05:35 AM
Ten minutes from resuming launch coverage.

And eighteen minutes from the fourth stage's third burn.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 05:42 AM
2 hours Mission Elapsed Time.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 05:43 AM
Missed posting my liftoff capture!
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 05:44 AM
Broadcast link.

http://live-24framesdigital.netdna-ssl.com/isro/PSLVC35
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 05:46 AM
Launch coverage has resumed.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: sanjaykumar on 09/26/2016 05:46 AM
Live telecast commenced

http://www.ddpodhigai.org.in/live.html (http://www.ddpodhigai.org.in/live.html)
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 05:47 AM
Coverage has started.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 05:48 AM
Our commentators.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 05:49 AM
About four minutes to engine start.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 05:50 AM
Briefly discussing the secondary payloads.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 05:53 AM
T+2 hours 10 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 05:53 AM
T+2 hours, 11 minutes, 47 seconds.

Fourth stage has restarted again. This last burn will be 19.44 seconds long.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 05:53 AM
T+2 hours 11 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 05:54 AM
T+2 hours, 12 minutes, 6 seconds.

Fourth stage shutdown confirmed. Powered flight is complete.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 05:54 AM
T+2 hours, 12 minutes, 43 seconds.

The Dual Launch Adapter has been jettisoned. Standing by for the seven secondary payloads to jettison.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 05:54 AM
PS4 3rd ignition.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 05:55 AM
We have one breakwire and AlSat-Nano separation.

We have another breakwire and CanX 7 separation.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 05:55 AM
T+2 hours 13 minutes. First two sats away!
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 05:56 AM
T+2 hours 14 minutes.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 05:57 AM
Next three sats separated.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 05:58 AM
Pathfinder 1 separated. Mission success!
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 05:58 AM
Pratham, PISat, AlSat 2B, AlSat 1B, and BlackSky Pathfinder 1 have all been jettisoned. Thanks to successful breakwires.

Congrats to ISRO, ASAL, BlackSky Global, IIT Bombay, the Crucible of Research and Innovation Laboratory of PESIT, the UK Space Agency, and UTIAS on the successful execution of PSLV C35's 2.25-hour long ride into polar orbit.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 05:59 AM
A.S. Kiran Kumar now giving a post-launch speech.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 05:59 AM
All separation times. Satellite plot. ISRO chairman.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 06:00 AM
Dr. K. Sivan now giving a few words.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 06:00 AM
VSSC Director.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: ZachS09 on 09/26/2016 06:02 AM
That's all for my play-by-play coverage.

Good night everyone; gotta get to bed because I have a biology exam next morning.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 06:03 AM
SDSC Director. 8th launch this year delivered 8 satellites into orbit. Longest PSLV mission 2 hours 15 minutes. Shortest preparation of 35 days.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 06:06 AM
Mission Director.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 06:09 AM
IPRC Director.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 06:12 AM
IISU Director. Scatsat 1 in 1 km precision orbit.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 06:13 AM
SAC Director.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 06:17 AM
Satellite Director.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 06:18 AM
ISRO Chairman. Talking about GSLV Mk.III.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vineethgk on 09/26/2016 06:21 AM
Chairman says GSLV Mk III assembly has started.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Steven Pietrobon on 09/26/2016 06:21 AM
End of webcast.

Congratulations to ISRO and all its customers for the successful launch!
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: input~2 on 09/26/2016 06:25 AM
10 objects  are expected in orbit:
8 S/C, 1 DLA, 4th stage
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vineethgk on 09/26/2016 06:27 AM
Thanks everyone !  Special thanks to Steve, Chris and ZachS09 for the wonderful coverage!
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vineethgk on 09/26/2016 07:56 AM
Launch photos.. Not as good as the pre-launch set though. Hope they'll upload better ones soon..

Source (http://www.isro.gov.in/pslv-c35-scatsat-1/pslv-c35-scatsat-1-gallery)
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: FutureSpaceTourist on 09/26/2016 09:50 AM
Quote
Peter B. de Selding ‏@pbdes 16m16 minutes ago

BlackSky confirms telemetry from Pathfinder-1 satellite following release from PSLV rocket. A tech demo for future 60-sat constellation.

https://twitter.com/pbdes/status/780339521816764416 (https://twitter.com/pbdes/status/780339521816764416)
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: input~2 on 09/26/2016 10:20 AM
First TLE is out (with a misprint: 2016-058A should be 2016-059A!)

2016-059A/41783 in 643 x 731 km x 98.10°
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: s^3 on 09/26/2016 11:27 AM
Please post the TLE ..  albeit wrogly identified.

Thanks
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Chris Bergin on 09/26/2016 11:38 AM
Congrats to all involved and thanks again for the coverage over the stupid hours :)

Final rev of William's article:
https://www.nasaspaceflight.com/2016/09/isro-pslv-scatsat-1-launch/
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: input~2 on 09/26/2016 11:50 AM
Please post the TLE ..  albeit wrogly identified.

Thanks

Sorry, we avoid publishing raw TLE on NSF
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: s^3 on 09/26/2016 12:48 PM
Oh ..  I thought I missed on other public sources ..  OK , I understand
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: input~2 on 09/26/2016 01:13 PM
8 more objects have been cataloged:

2016-059B/41784 in 658 x 708 km x 98.20°
2016-059D/41786 in 661 x 704 km x 98.20°
2016-059E/41787 in 661 x 703 km x 98.20°
2016-059F/41788 in 661 x 702 km x 98.20°
2016-059G/41789 in 661 x 699 km x 98.20°
2016-059H/41790 in 717 x 734 km x 98.12°
2016-059J/41791 in 660 x 699 km x 98.21°
2016-059K/41792 in 661 x 699 km x 98.20°
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Rocket Science on 09/26/2016 01:23 PM
Congrats to all the teams, well done! Thanks to NSF for the great coverage! :)
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: jcm on 09/26/2016 01:36 PM
8 more objects have been cataloged:

2016-059B/41784 in 658 x 708 km x 98.20°
2016-059D/41786 in 661 x 704 km x 98.20°
2016-059E/41787 in 661 x 703 km x 98.20°
2016-059F/41788 in 661 x 702 km x 98.20°
2016-059G/41789 in 661 x 699 km x 98.20°
2016-059H/41790 in 717 x 734 km x 98.12°
2016-059J/41791 in 660 x 699 km x 98.21°
2016-059K/41792 in 661 x 699 km x 98.20°


59H presumably ScatSat.   Perigees for the rest look a bit lower than expected, would be interesting to hear
how close to plan the restart burns of PS4 were.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vyoma on 09/26/2016 03:52 PM
http://www.isro.gov.in/update/26-sep-2016/pslv-c35-successfully-launches-eight-satellites-two-different-orbits-single

PSLV-C35 Successfully Launches Eight Satellites into Two Different Orbits in a Single Flight
In its thirty seventh flight (PSLV-C35), ISRO's Polar Satellite Launch Vehicle successfully launched the 371 kg SCATSAT-1 Satellite along with seven co-passenger satellites today morning (September 26, 2016) from Satish Dhawan Space Centre SHAR, Sriharikota. This is the thirty sixth consecutively successful mission of PSLV.  The total weight of all the eight satellites carried on-board PSLV-C35 was 675 kg. PSLV-C35 is the first PSLV mission to launch satellites carried onboard into two different  orbits. This PSLV mission was the longest of the PSLV missions conducted till date and was completed in 2 hours 15 minutes and 33 seconds after lift-off.

After PSLV-C35 lift-off at 0912 hrs (9:12 am) IST from the First Launch Pad with the ignition of the first stage, the subsequent important flight events, namely, strap-on ignitions and separations, first stage separation, second stage ignition, payload fairing separation, second stage separation, third stage ignition and separation, fourth stage ignition and cut-off, took place as planned. After a flight of 16 minutes 56 seconds, the vehicle achieved a polar Sun Synchronous Orbit of 724 km inclined at an angle of 98.1 degree to the equator (very close to the intended orbit) and 37 seconds later the primary satellite SCATSAT-1 was separated from the PSLV fourth stage.

After separation, the two solar arrays of SCATSAT-1 satellite were deployed automatically and ISRO's Telemetry, Tracking and Command Network (ISTRAC) at Bangalore took over the control of the satellite. In the coming days, the satellite will be brought to its final operational configuration following which it will begin to provide weather related services using its scatterometer payload.  The data sent by SCATSAT-1 satellite will help provide weather forecasting services to user communities through the generation of wind vector products as well as cyclone detection and tracking.

After the successful separation of SCATSAT-1, the PSLV-C35 mission continued. Still carrying the seven co-passenger satellites, the fourth stage of PSLV coasted over the South polar region and then started ascending towards the Northern hemisphere. A safe distance between the orbiting SCATSAT-1 and PSLV-C35 fourth stage was maintained by suitably manoeuvring the stage.

At 1 hour 22 minutes and 38 seconds after lift-off as the fourth stage was in the North polar region, the two engines of PSLV fourth stage were reignited and fired for 20 seconds. As a result of this, it entered into an elliptical orbit measuring 725 km on one side of the Earth and 670 km on the other.   

And 50 minutes later, as the PSLV fourth stage was again coasting near the south pole, its engines were fired for another 20 seconds. This second firing made the fourth stage to enter into a circular orbit of 669 km height inclined at an angle of 98.2 degree to the equator.

37 seconds later, the Dual Launch Adapter was successfully separated from the PSLV-C35 fourth stage. 30 seconds after this event, ALSAT-1N was the first co-passenger satellite to be separated successfully. Following this, the NLS-19, PRATHAM, PISAT, ALSAT-1B, ALSAT-2B, and Pathfinder-1 were separated from the PSLV fourth stage in a predetermined sequence thereby successfully completing PSLV-C35 mission.

Of the seven co-passenger satellites carried by PSLV-C35, two – PRATHAM weighing 10 kg and PISAT weighing 5.25 kg – are University/Academic institute satellites and were built with the involvement of students from IIT-Bombay and PES University, Bangalore and its consortium, respectively.

The remaining five co-passenger satellites were international customer satellites from Algeria (three – ALSAT-1B, ALSAT-2B and ALSAT-1N), Canada (one- NLS-19) and the United States (one – Pathfinder-1).

With today’s launch, the PSLV’s capability to launch satellites into two different orbits has been successfully demonstrated. The total number of satellites launched by India’s workhorse launch vehicle PSLV has now reached 121, of which 42 are Indian and the remaining 79 are from abroad.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: worldtimedate on 09/26/2016 08:32 PM
Quote
In a first for India’s PSLV, the fourth stage re-ignited two times -- each for about 20 seconds -- to nudge the mission’s seven other satellite payloads into a slightly lower orbit.

The PSLV’s fourth stage never had to fire more than once on any earlier mission, but Indian engineers tested the rocket’s ability to conduct multiple firings after finishing its job on a launch in June.

"This was two missions in one mission achieved today," said B. Jayakumar, ISRO’s mission director for Monday’s flight, known as PSLV-C35 in the organization’s launch sequence.

Quote
"The re-start of the upper stage and placing satellites in different orbits also has improved the marketability of PSLV the flexibility and versatility of PSLV and this also puts PSLV in a very unique position of advantage," said S. Rakesh, director of the ISRO Propulsion Complex.

Quote
The PSLV’s market share has grown as Russian rockets, such as the Dnepr launcher jointly managed with Ukraine, have been grounded or removed from the marketplace.

Source :  India declares success on PSLV’s most complex mission (http://spaceflightnow.com/2016/09/26/india-declares-success-on-pslvs-most-complex-mission/)

worldtimedate [ http://www.world-timedate.com/ ]
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: worldtimedate on 09/26/2016 08:38 PM
Quote
In a first, Indian Space Research Organisation (ISRO)'s PSLV C-35 rocket launched a total of eight satellites, into two different orbits.

Quote
The rocket was re-ignited twice during its flight to place the set of satellites in different orbits. Due to the re-ignition, the Monday's launch is by far the longest PSLV launch by ISRO.

ISRO said though it had launched several PSLV rockets in the past, this launch is "the first mission of PSLV in which it had launched its payloads into two different orbits," ISRO said.

Source : In a first, PSLV puts 8 satellites in two different orbits (http://www.thehindu.com/sci-tech/science/isros-pslvc35-places-scatsat1-into-orbit-on-its-way-to-place-seven-others/article9149124.ece?homepage=true)

worldtimedate [ http://www.world-timedate.com/ ]
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: s^3 on 09/28/2016 07:18 AM
A dumb question.

Sun synch orbits are repetitive. So even if rest of the satellites were launched @ SCATSAT altitude and then slowly ( 2-3 burns of local thrusters )could have been brought down to their intended orbit at the cost of onbord fuel of each satellite.
Of course you may have to live with a shift in reference frame or wait for one cycle before thruster operations to do this.

Then what was achieved by extending the launch operation over 2 hours and spending some PS4 fuel in 2 reburns?

 
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Jarnis on 09/28/2016 07:24 AM
A dumb question.

Sun synch orbits are repetitive. So even if rest of the satellites were launched @ SCATSAT altitude and then slowly ( 2-3 burns of local thrusters )could have been brought down to their intended orbit at the cost of onbord fuel of each satellite.
Of course you may have to live with a shift in reference frame or wait for one cycle before thruster operations to do this.

Then what was achieved by extending the launch operation over 2 hours and spending some PS4 fuel in 2 reburns?

Save propellant on the sats?

Make the orbit possible for sats with no maneuvering capability?
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vineethgk on 09/28/2016 07:27 AM
A dumb question.

Sun synch orbits are repetitive. So even if rest of the satellites were launched @ SCATSAT altitude and then slowly ( 2-3 burns of local thrusters )could have been brought down to their intended orbit at the cost of onbord fuel of each satellite.
Of course you may have to live with a shift in reference frame or wait for one cycle before thruster operations to do this.

Then what was achieved by extending the launch operation over 2 hours and spending some PS4 fuel in 2 reburns?

Save propellant on the sats?

Make the orbit possible for sats with no maneuvering capability?
And PS4 did a small change in inclination for the sats too. Might be more fuel consuming than change in altitude?
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: s^3 on 09/28/2016 11:45 AM
In an earlier launch ( IRS 1D ) a malfuction put the saellite in an elliptical orbit of 300 x 823 km. The correction to the initial orbit would have consumed too much fuel so the satellite was placed in an elliptical sunsynchronous orbit. The manoeuvres consumed about 67 kg of its fuel, leaving slightly over 16 kg.

Still the sat functioned for several years.

In the latest launch there is no much change in the orbits .. so whether it was a necessity or attempt for future more complex mission?
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vineethgk on 09/28/2016 01:02 PM
In an earlier launch ( IRS 1D ) a malfuction put the saellite in an elliptical orbit of 300 x 823 km. The correction to the initial orbit would have consumed too much fuel so the satellite was placed in an elliptical sunsynchronous orbit. The manoeuvres consumed about 67 kg of its fuel, leaving slightly over 16 kg.

Still the sat functioned for several years.

In the latest launch there is no much change in the orbits .. so whether it was a necessity or attempt for future more complex mission?
I guess it could be both. The smaller companions of SCATSAT may have preferred a lower orbit for their needs while the SCATSAT required a higher orbit. So, this may have been ISRO's test to see whether it could meet both requirements in a flexible single mission. Now, we might see more of the kind in the coming years.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Sam Ho on 09/28/2016 11:34 PM
In an earlier launch ( IRS 1D ) a malfuction put the saellite in an elliptical orbit of 300 x 823 km. The correction to the initial orbit would have consumed too much fuel so the satellite was placed in an elliptical sunsynchronous orbit. The manoeuvres consumed about 67 kg of its fuel, leaving slightly over 16 kg.

Still the sat functioned for several years.

In the latest launch there is no much change in the orbits .. so whether it was a necessity or attempt for future more complex mission?
I guess it could be both. The smaller companions of SCATSAT may have preferred a lower orbit for their needs while the SCATSAT required a higher orbit. So, this may have been ISRO's test to see whether it could meet both requirements in a flexible single mission. Now, we might see more of the kind in the coming years.
I would guess the different deployment orbits are for orbital debris mitigation.  A satellite at 660km typically has an orbital lifetime right around the 25 year limit and therefore needs no end-of-life deorbit burn.  I believe the smaller of the secondaries don't even have any propulsion.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vyoma on 10/07/2016 06:57 PM
SCATSat-1 products are here, showing Hurricane Matthew and Hurricane Chaba: http://www.isro.gov.in/pslv-c35-scatsat-1/scatsat-1-latest-products
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: m.prasad on 10/12/2016 01:31 PM
This is not the 1st time ISRO is launching payloads in different orbits. PSLV-C3 achieved this long back. TES & BIRD were ejected into 568 Km SSO where as PROBA was pushed into 568 x 638 km Elliptical Orbit (as per Kiran Kumar in the C35-post-launch-press-meet with a Tamil news channel). So technically this is 2nd time to achieve such feat. Of course, first time with multi-burn technology. :)

Does any one know how ISRO had achieved this in C3?

Thx
~Prasad
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vyoma on 10/12/2016 03:37 PM

Does any one know how ISRO had achieved this in C3?


They used fourth stage reaction control thrusters (RCS) to change orbit: http://www.isro.gov.in/update/22-oct-2001/pslv-launch-successful-places-three-satellites-orbit

Quote
The flight profile for PSLV-C3 mission had been modified to place the three satellites in their specified orbits -- the Indian satellite, TES and the German satellite, BIRD, in a 568 km sun-synchronous orbit and the third satellite, the Belgian PROBA in a 568 x 638 km elliptical orbit - which require firing the reaction control thrusters of PSLV fourth stage for about 500 seconds after the separation of first two satellites.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vyoma on 11/01/2016 02:47 AM
http://isro.gov.in/scatsat-1-wind-products-beta-version-released

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SCATSAT-1 Wind Products (BETA Version) Released

SCATSAT-1 was launched on September 26, 2016 and was injected into 720 km orbit with the required inclination of 98°. The satellite was put into the orbit at 9:30 AM local time and then was slowly allowed to drift and it will be arrested to 8:45 AM local time. Ku-band Scatterometer of SCATSAT-1 is the main sensor on board this satellite and the data is very useful for Atmospheric and Oceanographic Applications. The Scatterometer payload of SCATSAT-1 is identical to OSCAT payload of Oceansat-2. Back scatter coefficient (sigma – 0) and Wind products are main products from this satellite.

The objectives of SCATSAT-1 Mission are:
 * To design, develop, launch and operate a state of art three axis body stabilised satellite providing ocean based remote sensing services to provide continuity of weather forecasting services to the user community

 * To develop remote sensing capability with respect to global day and night weather forecasting

 * To establish a ground segment to receive and process the payload data at a specified turn around time to meet the requirements of the user community

 * To develop related algorithms and data products at 50 km X 50 km and 25 km X 25 km grids to serve the well-established application areas and also to enhance the mission utility

Data Processing:

There are 14 to 15 orbits data available daily from SCATSAT-1 satellite. The data is being downloaded daily at Shadnagar and Antarctica ground stations together for all the orbits. The downloaded data at Antarctica is being transferred to Shadnagar for further processing and dissemination. Chains to receive, process and disseminate data products are developed in Integrated Multi-mission Ground Segment for Earth Observation Satellites (IMGEOS) environment. The systems are designed in such a way that the same can be used for future SCATSAT missions too.

Scatterometer provides back scatter coefficients over the oceans. With these values, sigma – 0 and wind vectors of the entire globe are getting computed and corresponding HDF products are being generated.  In contrary to OSCAT, here products are generated for pole to pole - North Pole (NP) to South Pole (SP) and SP to NP.           

Different types of products are getting generated for 50 km and 25 km grid sizes. Level-2B, Level-3 products are planned to be provided to all users through internet. Level-1B and Level-2A products will be enabled for access only for specific users.  Figure-1 and Figure-2 show global sigma-0 and global wind products respectively for October 18, 2016.

Data Dissemination:

Various types of products are planned to be disseminated through web portal and ftp server in near real time (within 50 minutes of data acquisition at Svalbard or Antarctica).  Level-1B, Level-2A and Level-2B products will be supplied to specific users. Level-2B and Level-3 products will be uploaded onto ftp and web portal so that the users can download products in near real time mode.

Beta Version of SCATSAT-1 Wind Products were released recently to all the users for their research and feedback. Validation of software and products is in progress and operational products will be released shortly.

SCATSat-1 data products beta: http://nrsc.gov.in/SCATSAT-1_Wind_Products
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vineethgk on 01/31/2017 12:27 PM
ISRO's Story of the Week - Polar Sea Ice Monitoring using SCATSAT-1 Data (http://www.isro.gov.in/polar-sea-ice-monitoring-using-scatsat-1-data)
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Ku-band Scatterometer on-board SCATSAT-1 (launched on September 26, 2016) is ISRO’s second space borne scatterometer similar to OSCAT on-board Oceansat-2. The payload instrument is a vital tool globally used to study wind patterns above the ocean, air-sea interactions, ocean circulation and their overall effects on weather patterns. Climate quality data will also provide accurate knowledge regarding Himalayan ice formation and melting, cyclones formation near Indian coastal line, Greenland ice melting etc.,

A hybrid classification technique has been developed to classify SCATSAT-1 data (2.25 km) for discriminating Sea ice and open ocean water. It uses σ0 composites in both the horizontal and vertical polarisations (σ0H and σ0V) and defines a normalised pseudo-polarisation quantity known as the Active Polarisation Ratio (APR).

A time series SCATSAT-1 data clearly shows the increasing Sea ice in the Arctic and decreasing Sea ice in the Antarctic from November 2016 to January 2017. It is shown in the 5-days interval animation prepared from the FCC of SCATSAT-1 (2.25 km) data over the Arctic and the Antarctic.

Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: Stan Black on 02/05/2017 07:05 AM
Brochure is out!
Source (http://www.isro.gov.in/pslv-c35-scatsat-1/pslv-c35-scatsat-1-gallery)
I have checked the brochure and the one for flight C33 (IRNSS-1G) - it looks like all 3 pairs of SRBs separate only 2 seconds earlier this time than in the last -XL flight. Does that sound right for the old G version?

Yes and this is undoubtedly PSLV-G with its shorter PSOMs and the missing SITVC on PSOM-5 which was a modification on C7 and in place since. PSOMXL have SITVC on 4 and 5 both. But they are calling it XL not only in brochure and mission page but on that 'curtain raiser' video as well…

There is an edited brochure. Targeted orbit is different too.
http://www.isro.gov.in/sites/default/files/pslv-c35_finalbrochure.pdf
http://www.isro.gov.in/sites/default/files/flipping_book/PSLV_C35_5/files/assets/common/downloads/PSLV-C35%20Brochure.pdf
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vineethgk on 04/19/2017 06:41 PM
SCATSAT-1 operational products to be available from April 24, 2017 for all users (http://www.isro.gov.in/pslv-c35-scatsat-1/scatsat-1-operational-products)
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SCATSAT-1 satellite carrying Ku-band Scatterometer was launched on September 26, 2016. This provides Back-Scattering coefficient (Sigma – 0) over whole globe and wind vector over ocean surface. This data is useful for various Atmospheric, Oceanographic as well as Land applications. ISRO is happy to announce the release of operational Sigma – 0 and Wind Products to all users from April 24, 2017 onwards. All old data sets (from October 12, 2016 to April 23, 2017) are planned to be reprocessed and will be made available shortly. These products will be available in 25 km and 50 km grids in HDF5 format.
Title: Re: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)
Post by: vyoma on 08/02/2017 12:12 AM
http://www.isro.gov.in/flood-monitoring-using-scatsat-1-satellite

Flood Monitoring using SCATSAT-1 Satellite

Monsoon was active over different regions of India especially in Gujarat, Eastern Uttar Pradesh, Western Bihar, Assam and lately in West Bengal during mid July 2017. Heavy rains have created severe floods in these regions with extreme flood in parts of Gujarat and neighboring areas. Districts namely Banaskantha, Ahmedabad, Gandhinagar, Mehsana, Patan, Sabarkantha etc., recorded more than 300% rainfall above average level during July 20, 2017 to July 26, 2017.

Satellite plays important role in detection and monitoring of flood situations over large regions. Optical remote sensing from geostationary platform (INSAT-3D/3DR) provides rapid and valuable information on cloud patterns and meteorological parameters (rainfall); however, unable to image the surface water conditions in presence of cloud.  Microwave remote sensing techniques have unique advantage in which electromagnetic radiation penetrate the clouds and senses the surface hydrological characteristics. The data from SCATSAT-1 (launched by PSLV-C35 on September 26, 2016) was used for the detection of the flood situations over India.

SCATSAT-1 is a continuity mission for Oceansat-2 Scatterometer for Ocean weather forecasting, cyclone detection and tracking. The satellite carries Ku-band Scatterometer and scans in a conical fashion in HH and VV polarizations and allows developing high-resolution datasets due to high overlapping areas. SCATSAT-1 observations in Ku-band for backscattering and brightness temperatures have been analyzed for flood detection and monitoring over India with special emphasis in Gujarat and southern parts of Rajasthan.

Merging of backscattering and brightness temperature data helped to delineate the regions, which were flooded, partially submerged or existed in different soil wetness conditions (saturated or dry). Inundated areas have been obtained during second week of July over Ganga (Kanpur to Patna and Kosi river) and Brahmaputra flood plains. Extreme flooding conditions were observed in Ahmedabad, Mehsana, Kheda, Banskantha, Bhavnagar as compared to relatively dry conditions in Bharuch during fourth week of July along with moderate inundation in parts of West Bengal.

Sentinel-1A, a C-band SAR imaging satellite high resolution data on July 24, 2017 helped to compare inundated regions over parts of Gujarat. Observations on flooding conditions were well correlated in SCATSAT-1 and Sentinel-1A data.

Analysis showed the usefulness of SCATSAT-1 mission in detecting and monitoring extreme events such as flood with high temporal resolution (daily). Further details can be obtained from VYOM  and VEDAS web portal of Space Applications Centre.

(http://i.imgur.com/5QXDbac.gif)