Post by: input~2 on 04/18/2015 03:01 pm
source: http://www.vssc.gov.in/VSSC_V4/index.php/launchers/launchers-pslv (http://www.vssc.gov.in/VSSC_V4/index.php/launchers/launchers-pslv)
Post by: input~2 on 08/23/2015 08:28 pm
(source (http://prabhanews.cloudapp.net/%E0%B0%B7%E0%B0%BE%E0%B0%B0%E0%B1%8D%E2%80%8C%E0%B0%B2%E0%B1%8B-%E0%B0%B5%E0%B0%B0%E0%B1%81%E0%B0%B8%E0%B0%97%E0%B0%BE-%E0%B0%B0%E0%B0%BE%E0%B0%95%E0%B1%86%E0%B0%9F%E0%B1%8D%E2%80%8C-%E0%B0%AA%E0%B1%8D%E0%B0%B0%E0%B0%AF%E0%B1%8B%E0%B0%97%E0%B0%BE%E0%B0%B2%E0%B1%81-1))
Post by: isro-watch on 08/25/2015 03:45 am
Post by: Steven Pietrobon on 08/25/2015 05:03 am
Also mentioned in the article is PSLV C29 launch with 6 singapore satellites by the end of year
I believe that is TeLEOS 1, VELOX C1, Kent Ridge 1 , Galassia and two other satellites.
Post by: Skyrocket on 08/27/2015 11:59 am
Also mentioned in the article is PSLV C29 launch with 6 singapore satellites by the end of year
I believe that is TeLEOS 1, VELOX C1, Kent Ridge 1 , Galassia and two other satellites.
Correct.
Does anyone have info on the other two satellites?
Post by: Steven Pietrobon on 09/28/2015 09:31 am
http://www.satmaxvalier.it/index
The other payload might possibly be SkySat 3.
Post by: Skyrocket on 09/28/2015 09:58 am
The Max Valier page is showing a countdown to 5 December 0130 UTC. My records indicated that Max Valier was going to fly on a PSLV-CA, so it might be possible this payload is going to be on this flight.
http://www.satmaxvalier.it/index
The other payload might possibly be SkySat 3.
I am not sure, as this mission goes to a low inclination orbit of 15°, which would not allow direct contact of the satellite with ground stations in northern Italy.
SkysSat 3 would likely also prefer a high inclination orbit for more coverage.
Post by: Steven Pietrobon on 09/29/2015 05:37 am
Post by: input~2 on 10/18/2015 08:30 pm
http://www.thehindu.com/news/cities/bangalore/antrix-begins-global-pitch-for-gslv/article7772528.ece
Post by: input~2 on 10/22/2015 07:14 am
http://www.straitstimes.com/singapore/six-singapore-made-satellites-to-blast-into-space (http://www.straitstimes.com/singapore/six-singapore-made-satellites-to-blast-into-space)
Post by: input~2 on 10/22/2015 08:53 am
TeLEOS-1: 400 kg
Velox C1: 135 kg
Kent Ridge 1: 80 kg
Velox II: 12 kg
Galassia: 2 kg
Total: 629 kg
(sources: NTU, NUS)
Post by: input~2 on 11/10/2015 05:01 pm
http://www.sahilonline.org/newsDetails.php?cid=1&nid=37881
Post by: input~2 on 11/15/2015 02:40 pm
ISRO to launch five satellites in December (http://www.thehindu.com/news/national/karnataka/isro-to-launch-five-satellites-in-december/article7879596.ece)
Post by: input~2 on 11/28/2015 01:49 pm
http://timesofindia.indiatimes.com/home/science/Now-Isro-to-launch-6-to-12-satellites-a-year/articleshow/49823834.cms
Post by: zubenelgenubi on 12/03/2015 10:37 pm
The launcher will be PSLV-XLWhy use a PSLV-XL when the payloads' collective mass and orbital destinations seem to fit within the capabilities of the PSLV-CA?
http://timesofindia.indiatimes.com/home/science/Now-Isro-to-launch-6-to-12-satellites-a-year/articleshow/49823834.cms
When is the launch window on the 16th?
Post by: m.prasad on 12/04/2015 01:51 pm
Here are some important milestones:
01. SLV3-E1 10-Aug-1979
05. ASLV3-D1 13-Jul-1987
10. PSLV-D2 15-Oct-1994
15. PSLV-C3 22-Oct-2001
20. PSLV-C6 05-May-2005
25. PSLV-C10 21-Jan-2008
30. GSLV-D3(M2) 15-Apr-2010
35. PSLV-C18 12-Oct-2011
40. PSLV-C25 05-Nov-2013
45. GSLV-X1(M3) 18-Dec-2014
It took around ~35 years for ISRO to achieve this feat. One can observe a faster pace of launches in last few years (2nd 25 in last 7/8 years time period). Hope to see the century soon...:). I believe, ISRO will reach it within next 5-7 years time frame. :)
Thx
~Prasad
Post by: Ohsin on 12/04/2015 04:24 pm
04 ASLV
31 PSLV
09 GSLV
01 LVM3X
That is 49 flights :)
BUT we also had a contraption SO-300-200 that flew from Sriharikota
Quote
In the case of ASLV, Rohini rockets were used to test strap-ons. It may be recalled that ASLV was ISRO’s first launch vehicle to use strap-ons. To get some hand-on experience, ISRO rigged a Rohini strap-on rocket. The core was the RH-300 while the two strap-ons were the RH-200 rockets (only the boosters, of course). The contraption, designated as SO-300-200 was successfully flown on 16 October 1985 from Sriharikota.
Above excerpt taken from recently released book "From Fishing Hamlet to Red Planet". LVM3X and SO-300-200 both were suborbital experiments.
I think this footage(@4m30s mark) in this video is of SO-300-200.
https://www.youtube.com/watch?v=Eas4lV0eksc
Can't wait for Vol.2 it would have neat photographs :D
Post by: Galactic Penguin SST on 12/04/2015 05:19 pm
The launcher will be PSLV-XLWhy use a PSLV-XL when the payloads' collective mass and orbital destinations seem to fit within the capabilities of the PSLV-CA?
http://timesofindia.indiatimes.com/home/science/Now-Isro-to-launch-6-to-12-satellites-a-year/articleshow/49823834.cms
When is the launch window on the 16th?
One note: if this one is going up at morning local time it will clash with the long awaited party of a certain SoCal-aerospace-company-that-must-not-be-named. ;)
Post by: input~2 on 12/04/2015 05:26 pm
A2333/15 - PSLV-C29 ROCKET LAUNCH FROM 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 24 HR IN ADVANCE THROUGH A SEPARATE NOTAM. LAUNCH PAD COORD: 1343.9N 08014.2E NO FLT IS PERMITTED OVER THE DNG ZONE. A.DNG ZONE 1 A CIRCLE OF 10NM AROUND THE LAUNCHER B.DNG ZONE 2 A RECTANGULAR AREA BOUNDED BY: 1300N 08205E 1335N 08210E 1325N 08250E 1250N 08245E C.DNG ZONE 3 A RECTANGULAR AREA BOUNDED BY: 1220N 08445E 1255N 08455E 1240N 08550E 1205N 08540E D.DNG ZONE 4 A RECTANGULAR AREA BOUNDED BY: 0930N 09450E 1025N 09500E 1010N 09555E 0915N 09545E E.DNG ZONE 5 A RECTANGULAR AREA BOUNDED BY: 2100S 13400W 1900S 13400W 0800S 09400W 1000S 09400W ROUTES AFFECTED IN CHENNAI FIR ARE: N571 P761 W20 A465 P628 Q10 Q11 V003 V004 V009 AND V011 CLOSURE/ALTERNATE ROUTINGS: END PART 1 OF 2. BTN 1200-1600, 16 DEC 12:00 2015 UNTIL 15 JAN 16:00 2016. CREATED: 04 DEC 17:01 2015
Post by: input~2 on 12/04/2015 05:38 pm
Post by: input~2 on 12/05/2015 09:45 am
- 1st stage debris
- Fairing debris
- 2nd stage debris
- 3rd stage debris
This is the flight profile for PSLV-CA not PSLV-XL
Post by: zubenelgenubi on 12/05/2015 02:24 pm
NOTAMed areas for respectively:Re: the Times of India article of November 18 http://timesofindia.indiatimes.com/home/science/Now-Isro-to-launch-6-to-12-satellites-a-year/articleshow/49823834.cms (http://timesofindia.indiatimes.com/home/science/Now-Isro-to-launch-6-to-12-satellites-a-year/articleshow/49823834.cms)
- 1st stage debris
- Fairing debris
- 2nd stage debris
- 3rd stage debris
This is the flight profile for PSLV-CA not PSLV-XL
Either Director Kumar mis-spoke at the assembly, or the reporter mis-reported.
Post by: input~2 on 12/10/2015 07:38 am
Quote
The rocket is expected to blast off from the Sriharikota rocket port at 6 pm on December 16(i.e. 12:30 UTC)
Quote
ISRO will be flying the 'core alone' variant of the PSLV rocket
http://www.ndtv.com/india-news/isro-to-launch-6-singaporean-satellites-on-december-16-1253287
Post by: K210 on 12/10/2015 10:14 am
Post by: Skyrocket on 12/10/2015 04:46 pm
Launch pad will be FLP (First Launch Pad).
Launch Brochure:
http://www.isro.gov.in/sites/default/files/pslv-c29brochure.pdf
Post by: sportyfailure on 12/10/2015 04:50 pm
The satellite that wasn't known earlier is Athenoxat-1 owned by National University of Singapore
Date HS Code Description Origin Country Port of Discharge Unit Quantity Value (INR) Per Unit (INR)
30-Nov-2015 88026000 NUSKR1 SATELLITE ,PART NO:BST-NUS-KR1-001,(LAUNCH OF NUS-KENTRIDGE-1 ON INDIAN (PSLV) Germany Chennai Air Cargo NOS 1 138,678,320 138,678,320
30-Nov-2015 88026000 ATHENOXAT-1 FLIGHT MODEL (FM) AND THE ATTACHED SOLAR PANELS,PART NO: ATHENOX,(LAUNCH OF ATHENOXAT-1 ON INDIAN (PSLV)) Singapore Chennai Air Cargo NOS 1 7,627,520 7,627,520
20-Nov-2015 88026000 MICRO SATELLITE,PART NO:VELOX-CI,(FOR LAUNCH OF VELOX-CI ON INDIAN (PSLV)) South Korea Chennai Air Cargo NOS 1 542,127,620 542,127,620
14-Nov-2015 88026000 NANO-SATELLITE GALASSIA IN 2U NANO-SATELLITE DEPLOYER IN PELICASE,(PELICASE RETURNABLE),PART NO:GALASSIA,(FOR LAUNCH OF Singapore Chennai Air Cargo NOS 1 5,965,313 5,965,313
14-Nov-2015 88026000 SATELLITE * HOUSE 2 X 8S5P VES16 LITHIUM BATTERY,PART NO:TELEOS-1(FOR LAUNCH OF TELEOS-1 ON INDIAN PSLV) Singapore Chennai Air Cargo NOS 1 3,054,240,000 3,054,240,000
14-Nov-2015 88026000 VELOX-II SATELLITE 6U NANO - SATELLITE DEPLOYER ,PART NO:VELOX-II,(FOR LAUNCH OF VELOX-II ON INDIAN PSLV) Singapore Chennai Air Cargo NOS 1 17,895,938
Monetary Value of Satellites
Teleos-1 - 3,054,240,000 INR
KentRidge - 138,678,320 INR
VELOX-CI - 542,127,620 INR
ATHENOXAT-1 - 7,627,520 INR
GALASSIA - 5,965,313 INR
VELOX-II - 17,895,938 INR
More details go to zauba.com and search with satellite name. Cost of older satellites is also available
DeOrbitSail - 22,254,618 INR
CBNT-1 - 60,297,000 INR
DMC3 - 1,606,412,540 INR each for the three total 3x 1,606,412,540 INR
LAPAN-A2 - 168,796,256 INR
INR stands for Indian rupee
Post by: input~2 on 12/10/2015 07:07 pm
Six Satellites . I even found their Monetary value in export import database zauba.comWelcome to the forum, sporty and thanks for the valuable information!
The satellite that wasn't known earlier is Athenoxat-1 owned by National University of Singapore
Post by: Ohsin on 12/11/2015 08:07 am
As per my observation, this is the 50th rocket launch from Sriharikota (considering all SLVs - SLV, ASLV, PSLV, GSLV & LVM3). Can some one validate this point?
Here are some important milestones:
01. SLV3-E1 10-Aug-1979
05. ASLV3-D1 13-Jul-1987
10. PSLV-D2 15-Oct-1994
15. PSLV-C3 22-Oct-2001
20. PSLV-C6 05-May-2005
25. PSLV-C10 21-Jan-2008
30. GSLV-D3(M2) 15-Apr-2010
35. PSLV-C18 12-Oct-2011
40. PSLV-C25 05-Nov-2013
45. GSLV-X1(M3) 18-Dec-2014
It took around ~35 years for ISRO to achieve this feat. One can observe a faster pace of launches in last few years (2nd 25 in last 7/8 years time period). Hope to see the century soon...:). I believe, ISRO will reach it within next 5-7 years time frame. :)
Thx
~Prasad
ISRO is counting '49 Launch Vehicle Missions' so far ;D So yeah this will be 50th.
Source : https://twitter.com/pradeepbv/status/675188516511490049
Post by: vyoma on 12/11/2015 08:53 am
Post by: Ohsin on 12/11/2015 11:43 am
In flight profile, they've mentioned fourth stage restart as well.
To get rid of it I suppose?
Post by: sportyfailure on 12/11/2015 12:33 pm
Post by: vyoma on 12/12/2015 07:12 am
Post by: Ohsin on 12/13/2015 03:12 pm
Quote
Mission Readiness Review (MRR) committee and Launch Authorisation Board (LAB) have cleared the 59 hr countdown of PSLV-C29/TeLEOS-1 mission for Monday, December 14, 2015 starting at 07:00hr IST and the launch of PSLV-C29/TeLEOS-1 Mission for Wednesday, December 16, 2015 at 18:00 hr IST.
http://www.isro.gov.in/update/13-dec-2015/pslv-c29-teleos-1-mission-update-mission-readiness-review-mrr-committee-and
Post by: Ohsin on 12/14/2015 05:24 am
Quote
PSLV-C29/TeLEOS-1 Mission Update: The countdown has started at 07:00 hr IST today, Monday, December 14, 2015
Quote
Mono Methyl Hydrazine (MMH) propellant filling operation of fourth stage (PS4) has been completed by 10:45 hr IST. Preparations for Mixed Oxides of Nitrogen (MON-3) oxidiser filling operation of PS4 are under progress
http://www.isro.gov.in/update/13-dec-2015/pslv-c29-teleos-1-mission-update-countdown-has-started-0700-hr-ist-today-monday
http://www.isro.gov.in/update/13-dec-2015/pslv-c29-teleos-1-launch-update-mono-methyl-hydrazine-mmh-propellant-filling
Edit:
Quote
Mixed Oxides of Nitrogen (MON-3) oxidiser filling operation of PS4 is completed by 15:00 hr ISThttps://twitter.com/isro/status/676352244246175745
Post by: mangiumicro on 12/14/2015 01:09 pm
sorry to correct you... Athenoxat-1 has nothing to do with National University of Singapore.
It is developed and build by Microspace Rapid Pte Ltd, a private company in Singapore.
Cheers.
G.
Post by: isro-watch on 12/15/2015 03:23 am
http://www.isro.gov.in/pslv-c29-teleos-1-mission/pslv-c29-teleos-1-mission-gallery
Post by: Ohsin on 12/15/2015 04:10 am
Quote
Countdown is progressing normally. Live telecast by DD National and Webcast is available from 17:30 Hrs IST, Dec 16, 2015
http://www.isro.gov.in/update/15-dec-2015/pslv-c29-teleos-1-launch-update-countdown-progressing-normally-live-telecast-dd
Post by: worldtimedate on 12/15/2015 07:24 am
Quote
Interesting. This is the first time I am seeing fourth stage restart being mentioned in flight profile (but not sure if they were doing it earlier as well and just didn't put it in brochure). If it's not done before, and if it's to validate PAM-G, then it would be cool :)
If the last stage ( 4th stage for PSLV ) gets restarted in this mission, then this will be the first time that any ISRO launch vehicle is doing this feature. It will be an achievement, but disappointingly ISRO is late to accomplish such feature. Chinese Long March 3A had accomplished this feat in the late 80s. All the Long March 3 series of Launchers and Ariane 5 ES have restart capability for the last stage. Japanese H-IIA and H-IIB Launchers have 16 restarts capability for the last stage. Not to speak of US and Russian Launchers.
--- [ --- ]
Post by: vineethgk on 12/15/2015 12:28 pm
Post by: Ohsin on 12/15/2015 04:41 pm
Quote
ISRO to test multiple burn fuel stage/engine on December 16
The Indian space agency on Wednesday will be testing its ability to restart the fourth-stage engine of its rocket Polar Satellite Launch Vehicle (PSLV) on shutting it down after putting into orbit six Singaporean satellites.
Technically speaking, India will be testing its multiple burn fuel stage/rocket engine for the first time.
.
.
.
"The restart and shut off of the fourth stage engine is done as a first step towards launching multiple satellites but in different orbits,"
.
.
.
"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,"
.
.
.
"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,""By that time the rocket's engine has to be cooled down. This part of the experiment is very critical,"
http://zeenews.india.com/news/space/isro-to-test-multiple-burn-fuel-stage/engine-on-december-16_1834926.html
Post by: AJA on 12/15/2015 06:07 pm
What is the main challenge in the restart of a hypergolic upper stage, given that it does not require an igniter? Is it the difficulty in pushing propellent from tanks to the engine when the stage is experiencing zero acceleration? Or is it something else?
(Caveat: IANAE, but ...)
Ensuring that the engine doesn't have gas bubbles in the fuel/ox feed lines, and doesn't experience thrust transients; which might rip it apart; is a non-trivial problem. The LAM that they use for satellites operates with MMH and Nitrogen Tetroxide, IIRC, AND operates in a blow-down propulsion mode with Helium bottles providing the pressure. The (burpy) start provided by such a system might be OK at the lower thrust levels, and the smoother ramp up of an apogee motor for a satellite, but at the levels of thrust developed by a stage... you'd have to be concerned about RUD. So ISRO may've augmented the stage with (solid, monoprop, or even small bi-prop...although that seems unnecessarily complex) ullage motors, or modified the tankage to have those meshes and wicks that use capillary action and other surface tension effects (which strive to maintain a free surface), to ensure that the feed to the engines is smooth.
Furthermore, you'd have to maintain power to the final stage's flight computers (and the sensors) for ATLEAST the period of time between MECO and the second ignition. Satellites are power positive in that they GENERATE power. Not so for a rocket stage... so you'll have to add battery capacity. That means (non-payload) mass. You'd also probably want to maintain telemetry UPlink, in case you want to retain the option to command the stage remotely (for, what will be a very short lifetime - dictated by a mix of battery life time -- itself a function of thermal loads as you go in and out of orbital sunlight; and communication stations with the appropriate coverage).
Uplink (and downlink) AND power could potentially be established by using the satellite's communication systems itself (i.e. without requiring additional batteries or telemetry antennae on the stage)... provided that there was an umbilical between the payload and the stage to allow a reverse transfer of power, and data. Given that the payload fairing would've already been jettisoned, the payload's antenna will likely be unshielded (unless it's mounted with its axis pointing INTO the stage); and the solar panels of the satellite could be deployed. HOWEVER, performing STAGE thrust manoeuvres with the solar arrays deployed would put those fragile structures under stresses that they're likely not designed to handle (and likely WON'T be designed to handle... because of the mass cost for a one-off use). So yeah, power and data communications capability of the stage would have to be upgraded; in addition to the propulsion tankage/ullage mechanisms.
EDIT: I did read the Zee News bit that Ohsin linked to in the previous post, but I'm a little unsure as to why it has to be cooled down. Sure, transient thrust spikes and concomitant mechanical and thermal stresses are all sorts of complex, and I can imagine that there's a very strict set of initial conditions required during the startup of the engine... and yes, thermal expansion and the geometry changes of the combustion chamber and the nozzle, as well as heat dissipation (when starting cold, as opposed to starting hot) during the startup will all be different... but my gut feeling is still scoffing at how an engine that can operate for 100s (say) and sustain the thermal loads for that long, will have a problem if it operates for 40s, takes a break, and comes back.
Anyway, I wonder if there's any kind of regenerative cooling that they're using this time round? Pumping the fuel through the nozzle, and mixing it with rest of the fuel - to aid this (and general) cooling down?
Post by: Chris Bergin on 12/16/2015 12:16 am
Post by: William Graham on 12/16/2015 01:41 am
As per my observation, this is the 50th rocket launch from Sriharikota (considering all SLVs - SLV, ASLV, PSLV, GSLV & LVM3). Can some one validate this point?
Here are some important milestones:
01. SLV3-E1 10-Aug-1979
05. ASLV3-D1 13-Jul-1987
10. PSLV-D2 15-Oct-1994
15. PSLV-C3 22-Oct-2001
20. PSLV-C6 05-May-2005
25. PSLV-C10 21-Jan-2008
30. GSLV-D3(M2) 15-Apr-2010
35. PSLV-C18 12-Oct-2011
40. PSLV-C25 05-Nov-2013
45. GSLV-X1(M3) 18-Dec-2014
It took around ~35 years for ISRO to achieve this feat. One can observe a faster pace of launches in last few years (2nd 25 in last 7/8 years time period). Hope to see the century soon...:). I believe, ISRO will reach it within next 5-7 years time frame. :)
Thx
~Prasad
There have been sounding rocket launches from SHAR as well, so it's hard to justify counting the suborbital GSLV Mk.III and not those. The next launch after TeLEOS should be the 50th orbital attempt from the site though.
Post by: Chris Bergin on 12/16/2015 01:48 am
http://www.nasaspaceflight.com/2015/12/indian-pslv-six-singaporean-satellites/
Post by: jcm on 12/16/2015 04:23 am
http://zeenews.india.com/news/space/isro-to-test-multiple-burn-fuel-stage/engine-on-december-16_1834926.html
This appears to be a small 3m/s, 4 second retro burn so it shouldn't change the stage orbit very much - just
enough to assess the performance of the engine.
Post by: Ohsin on 12/16/2015 04:50 am
Quote
Mobile Service Tower (MST) withdrawal to Parking End is completed. Propellant (N2O4 and UH25) filling operations of Second Stage (PS2) are completed. Countdown is progressing normally.
http://www.isro.gov.in/update/16-dec-2015/pslv-c29-teleos-1-launch-update-mobile-service-tower-mst-withdrawal-to-parking
Post by: gwiz on 12/16/2015 09:52 am
Similar avoidance burns have been done on previous PSLV missions, presumably using the stage RCS instead of the main engine.
http://zeenews.india.com/news/space/isro-to-test-multiple-burn-fuel-stage/engine-on-december-16_1834926.html
This appears to be a small 3m/s, 4 second retro burn so it shouldn't change the stage orbit very much - just
enough to assess the performance of the engine.
Post by: seshagirib on 12/16/2015 10:13 am
Post by: mtakala24 on 12/16/2015 10:17 am
The web cast links in the ISRO web site do not work for me. (firefox - plug in required ) any alternatives ?
it points to http://live-24framesdigital.netdna-ssl.com/isro/webcast/161215/live.asx which can be opened with VLC player, but no live feed there yet.
Post by: Ohsin on 12/16/2015 10:18 am
The web cast links in the ISRO web site do not work for me. (firefox - plug in required ) any alternatives ?
On Doordarshan's Youtube channel (https://www.youtube.com/user/DoordarshanNational) they would post livestreaming link.
This is for network stream for VLC etc
http://24framesdigital.com/isro/webcast/161215/live.asx
Post by: mtakala24 on 12/16/2015 10:46 am
Post by: Kryten on 12/16/2015 11:05 am
Post by: K210 on 12/16/2015 11:08 am
Post by: K210 on 12/16/2015 11:10 am
Post by: ss1_3 on 12/16/2015 11:11 am
Post by: eeergo on 12/16/2015 11:16 am
Post by: eeergo on 12/16/2015 11:17 am
Post by: Chris Bergin on 12/16/2015 11:18 am
Post by: Chris Bergin on 12/16/2015 11:19 am
Post by: Chris Bergin on 12/16/2015 11:20 am
Post by: Chris Bergin on 12/16/2015 11:20 am
Post by: Chris Bergin on 12/16/2015 11:20 am
Post by: Chris Bergin on 12/16/2015 11:21 am
Post by: eeergo on 12/16/2015 11:27 am
Post by: Chris Bergin on 12/16/2015 11:27 am
Post by: Chris Bergin on 12/16/2015 11:28 am
Post by: Chris Bergin on 12/16/2015 11:29 am
Post by: Chris Bergin on 12/16/2015 11:31 am
Post by: Chris Bergin on 12/16/2015 11:31 am
Post by: Chris Bergin on 12/16/2015 11:32 am
Post by: Chris Bergin on 12/16/2015 11:32 am
Post by: Chris Bergin on 12/16/2015 11:33 am
Post by: Chris Bergin on 12/16/2015 11:34 am
Post by: Chris Bergin on 12/16/2015 11:35 am
Post by: Chris Bergin on 12/16/2015 11:35 am
Post by: Chris Bergin on 12/16/2015 11:37 am
Post by: Chris Bergin on 12/16/2015 11:37 am
Post by: Chris Bergin on 12/16/2015 11:40 am
Post by: Chris Bergin on 12/16/2015 11:44 am
Post by: Chris Bergin on 12/16/2015 11:47 am
Post by: Chris Bergin on 12/16/2015 11:48 am
Post by: Chris Bergin on 12/16/2015 11:50 am
Post by: Chris Bergin on 12/16/2015 11:50 am
Post by: Chris Bergin on 12/16/2015 11:52 am
Post by: Chris Bergin on 12/16/2015 11:53 am
Post by: Mapperuo on 12/16/2015 11:54 am
Post by: Chris Bergin on 12/16/2015 12:39 pm
http://www.nasaspaceflight.com/2015/12/indian-pslv-six-singaporean-satellites/
Post by: Ohsin on 12/16/2015 01:54 pm
<snip>
Monetary Value of Satellites
Teleos-1 - 3,054,240,000 INR
KentRidge - 138,678,320 INR
VELOX-CI - 542,127,620 INR
ATHENOXAT-1 - 7,627,520 INR
GALASSIA - 5,965,313 INR
VELOX-II - 17,895,938 INR
<snip>
INR stands for Indian rupee
And as per this DoS release
http://pib.nic.in/newsite/PrintRelease.aspx?relid=133386
Quote
Dr Jitendra Singh informed about the successful launch of six Singapore satellites from Sriharikota to mark the Golden Jubilee of the independence of the Republic of Singapore. He further informed that this launch was agreed upon on commercial basis and the government of Singapore has paid 26 million euros for it.
That is 1,893,574,845 INR
...
Post by: antriksh on 12/16/2015 02:18 pm
Post by: vineethgk on 12/16/2015 02:35 pm
Post by: baldusi on 12/16/2015 03:47 pm
Post by: sportyfailure on 12/16/2015 04:25 pm
And as per this DoS release
http://pib.nic.in/newsite/PrintRelease.aspx?relid=133386QuoteDr Jitendra Singh informed about the successful launch of six Singapore satellites from Sriharikota to mark the Golden Jubilee of the independence of the Republic of Singapore. He further informed that this launch was agreed upon on commercial basis and the government of Singapore has paid 26 million euros for it.
That is 1,893,574,845 INR
...
The import database only lists monetary value of satellites(like the amount insured for each paayliad and not launch insurance) and not launch costs
Post by: Ohsin on 12/16/2015 05:18 pm
Secondary objective successful ;D
Quote
Indian space agency ISRO on Wednesday successfully tested restarting of its Polar Satellite Launch Vehicle (PSLV) rocket after its engine was cut off during the mission to launch six Singaporean satellites, a top official said.
"The restart test was successful. The engine was fired for nearly five seconds. We will be using this technology sometime next year," Indian Space Research Organisation (ISRO) chairman A.S. Kiran Kumar told IANS.
According to him, the next three satellite launches using PSLV rocket will be navigation satellites.
After that, there will be some multiple satellite launches and this technology will be used, he added.
"The restart of the engine happened beautifully. The test was a success," S. Somnath, director of the Liquid Propulsions Systems Centre, told IANS.
According to him, the multiple burn fuel stage/engine will be used in PSLV-C35 rocket which will carry two satellites.
One satellite will be launched at an higher orbit and the other one will be at a slightly lower orbit, he said.
http://www.newindianexpress.com/states/andhra_pradesh/ISRO-Successfully-Tests-Multiple-Burn-Fuel-Engine-During-Launch-of-Six-Singaporean-Satellites/2015/12/16/article3180961.ece
Post by: beidou on 12/16/2015 06:22 pm
Thanks.
Post by: input~2 on 12/16/2015 07:43 pm
2015-077A or G/41172 in 400 x 573 km x 14.69°
Could be PSLV 4th stage.
Post by: vyoma on 12/17/2015 02:10 am
Dec 16, 2015
PSLV Successfully Launches Six Satellites from Singapore
In its thirty second flight conducted from Satish Dhawan Space Centre (SDSC), SHAR, Sriharikota today evening (December 16, 2015), ISRO's Polar Satellite Launch Vehicle PSLV-C29 successfully launched six satellites from Singapore, including the 400 kg TeLEOS-1, the primary satellite. The other five satellites were co. passenger payloads. PSLV-C29 launched all the six payloads into an orbit of 549 km height inclined at an angle of 15 deg to the equator. The six satellites carried by PSLV-C29 today together weighed about 624 kg at lift-off. These six satellites were launched as part of the agreement entered into between ST Electronics (Satcom & Sensor Systems), Singapore and Antrix Corporation Limited, the commercial arm of the Indian Space Research Organisation (ISRO), a government of India Company under the Department of Space (DOS). This is the eleventh flight of PSLV in ‘core-alone’ configuration (without the use of solid strap-on motors). PSLV has successfully launched 57 satellites for customers from abroad including the six Singapore satellites launched today. After a 59 hour smooth count down, the 227.6 ton PSLV-C29 lifted off from the First Launch Pad (FLP) at SDSC SHAR at 1800 hrs (6:00 pm) IST with the ignition of its first stage. The important flight events included the separation of the first stage, ignition of the second stage, separation of the payload fairing at about 117 km altitude, second stage separation, third stage ignition and separation, fourth stage ignition and cut-off. Once the intended orbit was achieved, TeLEOS-1 was deployed at about 18 min 12 seconds after lift-off. This was followed by the deployment of other five satellites, viz., Kent Ridge-1, VELOX-C1, VELOX-II, Galassia and Athenoxat-1 in quick succession in the subsequent three minutes.
Post by: vyoma on 12/17/2015 02:15 am
Would PAM-G require multiple restarts to deliver a satellite like GISAT to GEO? Maybe they have plans to test multiple restarts in the next few PSLV flights?
I think so. Once PAM-G+spacecraft is inserted into LEO/GTO, PAM-G would need to do burns at perigee to raise orbit, and then burns at apogee to make orbit circular. Once intended orbit is reached, PAM-G would detach itself from spacecraft and then probably perform another burn to raise itself into graveyard orbit.
Post by: antriksh on 12/17/2015 04:23 am
Would PAM-G require multiple restarts to deliver a satellite like GISAT to GEO? Maybe they have plans to test multiple restarts in the next few PSLV flights?
I think so. Once PAM-G+spacecraft is inserted into LEO/GTO, PAM-G would need to do burns at perigee to raise orbit, and then burns at apogee to make orbit circular. Once intended orbit is reached, PAM-G would detach itself from spacecraft and then probably perform another burn to raise itself into graveyard orbit.
IMHO, this restart testing has nothing to do with PAM-G, but to establish single launch multi-orbit mission capability of PSLV. PAM-G was to be used for Glonass sats. I think the restart capability can be used for OV.
Post by: vyoma on 12/17/2015 05:53 am
Would PAM-G require multiple restarts to deliver a satellite like GISAT to GEO? Maybe they have plans to test multiple restarts in the next few PSLV flights?
I think so. Once PAM-G+spacecraft is inserted into LEO/GTO, PAM-G would need to do burns at perigee to raise orbit, and then burns at apogee to make orbit circular. Once intended orbit is reached, PAM-G would detach itself from spacecraft and then probably perform another burn to raise itself into graveyard orbit.
IMHO, this restart testing has nothing to do with PAM-G, but to establish single launch multi-orbit mission capability of PSLV. PAM-G was to be used for Glonass sats. I think the restart capability can be used for OV.
You're right.
http://www.newindianexpress.com/states/andhra_pradesh/ISRO-Successfully-Tests-Multiple-Burn-Fuel-Engine-During-Launch-of-Six-Singaporean-Satellites/2015/12/16/article3180961.ece
Quote
"The restart and shut off of the fourth stage engine is done as a first step towards launching multiple satellites but in different orbits," an ISRO official told IANS, declining to be named.
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.
Quote
"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 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.
Post by: Steven Pietrobon on 12/17/2015 05:59 am
https://www.youtube.com/watch?v=0NusyXrLmZ4
Post by: Steven Pietrobon on 12/17/2015 06:25 am
Was there any mention of the launch schedule for 2016 in the Chairman's speech?
I listened to all the speeches, but no specific information was given. Mention was given to the three IRNSS launchers at a monthly rate and that they are working on PSLV C31, C32, C33 and 34.
Post by: Ohsin on 12/17/2015 07:54 am
Edit:
Great amateur footage.
https://www.youtube.com/watch?v=17t2KwLHlvM
Visibility was awesome and as far as Chennai it was startling people.
Post by: vineethgk on 12/17/2015 12:17 pm
https://www.youtube.com/watch?v=of-eIKyMeJA (https://www.youtube.com/watch?v=of-eIKyMeJA)
Post by: m.prasad on 12/17/2015 12:31 pm
Thx
~Prasad
Post by: Galactic Penguin SST on 12/17/2015 02:20 pm
https://www.youtube.com/watch?v=17t2KwLHlvM
Post by: aga on 12/17/2015 02:34 pm
What would be the impact on the payload if less velocity is imparted to it?
the periapsis/apoapsis would be lower (depending on where the burn occurred)
Post by: jcm on 12/17/2015 02:52 pm
The imparted velocity is 7.10 km/s. Was there any issue? Same was observed in C30/Astrosat launch as well. What would be the impact on the payload if less velocity is imparted to it? I mean does the satellite, post-injection, need extra-LAM burn to achieve the required velocity?
Thx
~Prasad
These sats don't have a LAM so they are stuck. Orbital data now in, looks fine: 530 x 550 km orbits
Post by: seshagirib on 12/18/2015 03:37 pm
Was there any mention of the launch schedule for 2016 in the Chairman's speech?
I listened to all the speeches, but no specific information was given. Mention was given to the three IRNSS launchers at a monthly rate and that they are working on PSLV C31, C32, C33 and 34.
No mention of the RLV-TD also........or did I miss it?
Post by: AJA on 12/19/2015 05:09 pm
http://www.newindianexpress.com/states/andhra_pradesh/ISRO-Successfully-Tests-Multiple-Burn-Fuel-Engine-During-Launch-of-Six-Singaporean-Satellites/2015/12/16/article3180961.ece (http://www.newindianexpress.com/states/andhra_pradesh/ISRO-Successfully-Tests-Multiple-Burn-Fuel-Engine-During-Launch-of-Six-Singaporean-Satellites/2015/12/16/article3180961.ece)
Quote from: TNIE article
At the time of restart the fourth stage was in a lower altitude of 523.9 km while the satellites were ejected at 550 km altitude.
The engine operating for few seconds went up to an altitude of 524 km before the stage was cut off again.
(emphases mine)
They burned prograde? Huh? Why?
Post by: Ohsin on 12/19/2015 10:37 pm
http://www.newindianexpress.com/states/andhra_pradesh/ISRO-Successfully-Tests-Multiple-Burn-Fuel-Engine-During-Launch-of-Six-Singaporean-Satellites/2015/12/16/article3180961.ece (http://www.newindianexpress.com/states/andhra_pradesh/ISRO-Successfully-Tests-Multiple-Burn-Fuel-Engine-During-Launch-of-Six-Singaporean-Satellites/2015/12/16/article3180961.ece)Quote from: TNIE articleAt the time of restart the fourth stage was in a lower altitude of 523.9 km while the satellites were ejected at 550 km altitude.
The engine operating for few seconds went up to an altitude of 524 km before the stage was cut off again.
(emphases mine)
They burned prograde? Huh? Why?
mmm I didn't pay attention to that but this Telugu source
http://www.andhrajyothy.com/Artical?SID=185600
Quote
శ్రీహరికోట (సూళ్లూరుపేట), డిసెంబరు 17(ఆంధ్రజ్యోతి): అంతరిక్ష పరిశోధనలో అగ్రరాజ్యాలకు దీటుగా దూసుకుపోతున్న ఇస్రో... కక్ష్యలో వ్యర్థాలు లేకుండా ప్రయోగం చేపట్టడంలో తొలి ప్రయత్నంలోనే విజయం సాధిం చింది. నెల్లూరుజిల్లా షార్ నుంచి బుధవారం పీఎ్సఎల్వీ-సీ29 రాకెట్ను విజయవంతంగా ప్రయోగించింది. ఆరు సింగపూర్ ఉపగ్రహాలను నిర్దేశిత కక్ష్యలో పెట్టింది. ఇదే ప్రయోగంలో మరో అద్భుతాన్ని షార్ శాస్త్రవేత్తలు సాధించారు. ఉపగ్రహాలను కక్ష్యలో ప్రవేశపెట్టిన అనంతరం అక్కడి నుంచి రాకెట్ వ్యర్థ మోటార్లను వెనుకకు తీసుకువచ్చేందుకు చేసిన తొలి ప్రయత్నంలోనే విజయం సాధించారు. కక్ష్యలో వ్యర్థాలు ఉండకూడదన్న ఐరాస సూచనలను ఇస్రో ప్రతిష్ఠాత్మకంగా తీసుకుని అమలుకు ప్రయత్నించింది.
Google translated
Quote
Sriharikota (sullurupeta), December 17 (for life): Space Research Organisation agrarajyalaku the burgeoning labor ... without waste orbit, an experiment has had success in the first attempt. Nellurujilla Shore piesaelvi-C 29 rocket successfully launched Wednesday. Singapore has six satellites in orbit prescription. Another miracle in the experiment, the scientists were able to Shore. After the launch of the satellites in orbit debris from the rocket motors made the first attempt to bring back success. ISRO's ambitious attempts to implement the instructions of the United Nations to bring the waste undakudadanna orbit.
It appears it might've been retro to mitigate debris?
Post by: gwiz on 12/20/2015 10:39 am
Post by: Ohsin on 01/01/2016 05:09 am
First stage separation was tad too smokey. You can see some pieces fly off before(@25s Shaped charge going off?) and after(@43s) the big puff @ 30 sec mark.
Edit: Stabilized the relevant portion
https://www.youtube.com/watch?v=3-VOIuANGnU