Author Topic: LIVE: SCATSat-1/Alsat-2B - PSLV C35 - September 26, 2016 (03:42 UTC)  (Read 56310 times)

Offline s^3

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3 days to launch SCATSAT....   still no brochure out for launch ;) .

Offline K210

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This launch might slip to september 30th

Offline input~2

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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


Offline vineethgk

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Brochure is out!
Source
« Last Edit: 09/23/2016 09:36 AM by vineethgk »

Offline Steven Pietrobon

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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.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline vineethgk

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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
« Last Edit: 09/23/2016 12:48 PM by vineethgk »

Offline Galactic Penguin SST

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?
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline s^3

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A simulated launch sequence for next PSLV :



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.
« Last Edit: 09/23/2016 04:07 PM by s^3 »

Offline vineethgk

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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

Offline sanjaykumar

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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

Offline sanjaykumar

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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

Offline vyoma

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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

Offline vyoma

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Offline vineethgk

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Mobile Service Tower (MST) withdrawal to parking end is completed. Preparations for propellant filling operation of Second Stage (PS2) are in progress

Source

Offline Galactic Penguin SST

Moved for live coverage.
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline Ohsin

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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:

« Last Edit: 09/25/2016 01:04 PM by Ohsin »
"Well, three cheers to Sharma, but our real baby is INSAT."

Offline sanjaykumar

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Offline vineethgk

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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


Offline sanjaykumar

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