Author Topic: PSLV-QL C48 - RISAT-2BR1 & 9 cubesats - FLP - 11 December 2019 (09:55 UTC)  (Read 26068 times)

Offline Steven Pietrobon

  • Member
  • Senior Member
  • *****
  • Posts: 33694
  • Adelaide, Australia
    • Steven Pietrobon's Space Archive
  • Liked: 22848
  • Likes Given: 4316
Going back and listening to the URSC Director, I'm pretty sure he means that RISAT 2BR2 is launching in two months, as he previously mentioned that RISAT 2BR1 is the second satellite in the series.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline chota

  • Full Member
  • **
  • Posts: 267
  • Liked: 108
  • Likes Given: 18

Offline TheVarun

  • Full Member
  • **
  • Posts: 221
  • CANADA
  • Liked: 37
  • Likes Given: 155
 Nice launch and mission!  Why the huge discrepancy between the original schedule for RISAT-2BRR2 and the new reputed date of February? Maybe the preparation for SSLV-1?

Offline jcm

  • Senior Member
  • *****
  • Posts: 3468
  • Jonathan McDowell
  • Somerville, Massachusetts, USA
    • Jonathan's Space Report
  • Liked: 1078
  • Likes Given: 665
Full set of separation times for the record:
-----------------------------

Jonathan McDowell
http://planet4589.org

Offline K210

  • Full Member
  • ****
  • Posts: 581
  • Liked: 232
  • Likes Given: 18
Nice launch and mission!  Why the huge discrepancy between the original schedule for RISAT-2BRR2 and the new reputed date of February? Maybe the preparation for SSLV-1?

Because it will be another 2 months before RISAT-2BR2 is ready for launch

Offline Rondaz

  • Senior Member
  • *****
  • Posts: 27060
  • Liked: 5290
  • Likes Given: 166
Confirmed that Tyvak-0129 is the NASA-ARC/Busek PDT-1 pathfinder demo test

https://twitter.com/planet4589/status/1204860228543680512

Offline K210

  • Full Member
  • ****
  • Posts: 581
  • Liked: 232
  • Likes Given: 18
Liftoff Shots

Offline Galactic Penguin SST

Hmm...I thought the main satellite is supposed to be a secret....

https://twitter.com/isro/status/1205102264580329478
Astronomy & spaceflight geek penguin. In a relationship w/ Space Shuttle Discovery. Current Priority: Chasing the Chinese Spaceflight Wonder Egg & A Certain Chinese Mars Rover

Offline Steven Pietrobon

  • Member
  • Senior Member
  • *****
  • Posts: 33694
  • Adelaide, Australia
    • Steven Pietrobon's Space Archive
  • Liked: 22848
  • Likes Given: 4316
Hmm...I thought the main satellite is supposed to be a secret....

They showed the satellite during the webcast, so I guess ISRO decided that showing what it looked like with the antenna deployed wasn't a big deal.
« Last Edit: 12/13/2019 04:49 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline seshagirib

  • Full Member
  • ***
  • Posts: 305
  • terra firma
  • Liked: 22
  • Likes Given: 30


Nice video of the launch,  as viewed from Chennai

Offline PM3010

  • Member
  • Posts: 1
  • India
  • Liked: 0
  • Likes Given: 6


Nice video of the launch,  as viewed from Chennai

Man, the separation events looks awesome! Thank god, it wasn't gloomy on the day of launch here in Chennai.

Offline K210

  • Full Member
  • ****
  • Posts: 581
  • Liked: 232
  • Likes Given: 18


Nice video of the launch,  as viewed from Chennai

These amutear videographers are doing a better job than DD. DD camera person cut off right at the moment of stage seperation in the livestream.

Offline K210

  • Full Member
  • ****
  • Posts: 581
  • Liked: 232
  • Likes Given: 18
Hmm...I thought the main satellite is supposed to be a secret....

https://twitter.com/isro/status/1205102264580329478

It's application is indeed a "secret". On the other hand ISRO historically has not been shy about posting images of military satellites (GSAT-7,GSAT-7A,Hysis and EMISAT are some examples) so i dont find this all too surprising. What i do find odd though it why this is not on their official website but is on some random twitter post.

Offline chota

  • Full Member
  • **
  • Posts: 267
  • Liked: 108
  • Likes Given: 18
Watch the successful deployment of Radial Rib Antenna of #RISAT2BR1 in orbit as observed by onboard camera.

https://twitter.com/isro/status/1206457891516846081

Online zubenelgenubi

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 9022
  • Arc to Arcturus, then Spike to Spica
  • Sometimes it feels like Trantor in the time of Hari Seldon
  • Liked: 5531
  • Likes Given: 50634
Has anyone answered, or found the answer to, why a PSLV-QL was used on this launch, as opposed to Core Alone (or DL for that matter)?
Support your local planetarium! (COVID-panic and forward: Now more than ever.)
My current avatar is saying "i wants to go uppies!"

Offline ZachS09

  • Space Savant
  • Senior Member
  • *****
  • Posts: 8106
  • Roanoke, TX
  • Liked: 2066
  • Likes Given: 1890
Has anyone answered, or found the answer to, why a PSLV-QL was used on this launch, as opposed to Core Alone (or DL for that matter)?

I donít know the answer, and I was asking the same question.

My logic is that the lighter the payload, the less capable variant of a rocket family you use to launch it.
Liftoff for St. Jude's! Go Dragon, Go Falcon, Godspeed Inspiration4!

Offline russianhalo117

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 8400
  • Liked: 4233
  • Likes Given: 762
Has anyone answered, or found the answer to, why a PSLV-QL was used on this launch, as opposed to Core Alone (or DL for that matter)?

I donít know the answer, and I was asking the same question.

My logic is that the lighter the payload, the less capable variant of a rocket family you use to launch it.
Qualification campaign to satisfy a future payload??

Offline jcm

  • Senior Member
  • *****
  • Posts: 3468
  • Jonathan McDowell
  • Somerville, Massachusetts, USA
    • Jonathan's Space Report
  • Liked: 1078
  • Likes Given: 665
Circling back to this 2019 mission:
There was discussion that the rocket had larger capacity than was used.
This image looks to me like a dual launch adapter rather than the usual payload adapter for single-main-payload missions. There is a cataloged debris object 2019-089G which SpaceTrack tags with radar cross section = LARGE.
It has been pointed out to me that the inclination versus time of object G shows a change in May 2020 suggesting maybe that something finished outgassing?
Maybe there was a dummy second payload that replaced a planned second primary payload?
Interested in other interpretations.
-----------------------------

Jonathan McDowell
http://planet4589.org

Online Skyrocket

  • Extreme Veteran
  • Senior Member
  • *****
  • Posts: 2545
  • Frankfurt am Main, Germany
  • Liked: 808
  • Likes Given: 161
Circling back to this 2019 mission:
There was discussion that the rocket had larger capacity than was used.
This image looks to me like a dual launch adapter rather than the usual payload adapter for single-main-payload missions. There is a cataloged debris object 2019-089G which SpaceTrack tags with radar cross section = LARGE.
It has been pointed out to me that the inclination versus time of object G shows a change in May 2020 suggesting maybe that something finished outgassing?
Maybe there was a dummy second payload that replaced a planned second primary payload?
Interested in other interpretations.

The Japanese QPS-SAR 1 (Izanagi) was carried inside the DLA (and IIRC also 1HOPSat-TD, too).

Tags:
 

Advertisement NovaTech
Advertisement SkyTale Software GmbH
Advertisement Northrop Grumman
Advertisement
Advertisement Brady Kenniston
Advertisement NextSpaceflight
Advertisement Nathan Barker Photography
0