/r/ISRO

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For anything related to Indian space agency we love but hardly know.

A fan-run subreddit for anything related to Indian Space Agency we love but hardly know.


Check out the Wiki! For FAQ and archives


2024-25 Tentative Launch Schedule

Updated on 16 January 2024

Vehicle Payload Date
PSLV-DL C58 XPoSAT 0910(IST), 1 Jan 2024
GSLV MkII INSAT-3DS NET 17 Feb 2024 [1] [2] [3] [4] [5] [6] [7]
HLVM3 Gaganyaan GX Q1 2024 [1]
TV-D2 ACES abort March 2024 [1] [2] [3]
SSLV-D3 ??? Q2 2024 [1] [2] [3] [4] [5] [6]
PSLV C59* Anvesha, Bikini Q2 2024 [1] [2] [3]
PSLV TDS-01 Q2 2024 [1] [2] [3] [4]
Falcon-9* GSAT-20 Q2 2024 [1] [2] [3]
GSLV MkII F16 NISAR Q2 or Oct 2024 [1] [2] [3] [4] [5]
PSLV-XL PROBA-3 Sep 2024 [1] [2]
PSLV C60 RISAT-1B 2024 [1]
HLVM3 Gaganyaan G1 H2 2024 [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11]
GSLV MkII EOS-5 (aka GISAT-2) 2024 [1] [2] [3] [4] [5]
GSLV MkII CMS-4 (aka IDRSS-1) TBD [1] [2] [3] [4] [5]
HLVM3 Gaganyaan G2 2025 [1] [2]
HLVM3 Gaganyaan H1 2025 [1] [2]
PSLV 3×HRSAT TBD [1]
GSLV MkII IDRSS-2 TBD [1]
LVM3 GSAT-32 TBD [1]
LVM3 GSAT-7R TBD [1] [2]

*Procured Launch / Commercial Payload


DoS Annual Report 2023-24

Archived Annual Reports and Outcome Budgets


Few Official Links:

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VSSC URSC SAC SHAR NRSC HSFC LPSC IPRC ISTRAC MCF INMCC IN-SPACe NSIL ANTRIX


Other Subreddits:

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This is a fan-run subreddit and not official ISRO website. For official information, visit ISRO.gov.in

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8

Chandrayaan-3 Rover LIBS: Pre-flight Characterization, Inflight Operations and Preliminary Observations

5 Comments
2024/12/05
15:17 UTC

6

The curious case of IRCB requirement 2023!!

Hello everyone, Can anyone working in ISRO or otherwise can tell that what went wrong with this process the notification and form filling was in july 2023 and exam held on 7th January almost after 6 months. Then interviews happened in aug-sept 2023 ( after 7 months ) and there is no sign of results.

I am 2021 passout and this is the first recruitment for which I am eligible because the last one was held in 2019. And after they reduced the max age limit to 27 this may be my recruitment considering the speed with which this happening.

Don't they think this a bit extreme or unfair to a guy that have only one chance in a lifetime to get into ISRO.

Jee gives max 2 chances And UPSC gives 6.

3 Comments
2024/12/05
10:34 UTC

5

Parliamentary Q&A [04 December 2024]: Queries on NISAR, space sustainability efforts and more.

Queries in Loksabha on 04 December 2024.

https://sansad.in/ls/questions/questions-and-answers


Q.No. 1503 PDF : On reasons behind delay of NASA-ISRO Synthetic Aperture Radar (NISAR) Mission

NASA-ISRO Synthetic Aperture RADAR (NISAR) is an Earth science mission being jointly developed by NASA and ISRO under a collaborative agreement.

The NISAR was earlier slated for launch in the first-half of 2024. However, during the assembly, integration & testing phase, NASA experts determined that the 12-meter Radar Antenna Reflector need some corrective actions and has to be taken to USA for rectification.

Subsequently, the Radar Antenna Reflector, was delivered to ISRO by NASA in October 2024, which is re-integrated with the satellite and currently undergoing necessary tests. Also, due to the eclipse season, the conditions are not conducive for deployment of NISAR’s boom and the Radar Antenna Reflector. In view of the afore-mentioned factors, NISAR is now likely to be launched during March 2025

 

Q.No. 1446 PDF : On steps taken for sustainable use of space.

Recognising the growing importance of Space Situational Awareness (SSA) for space sustainability, ISRO System for Safe and sustainable Space Operations Management (IS4OM) has been established to focus all efforts related to spaceflight safety and debris mitigation and for dealing with the emerging challenges in operating in a congested space environment. Network for Space object TRacking and Analysis (NETRA) has been approved by GOI for SSA capacity building.

ISRO adheres to the internationally accepted space debris mitigation guidelines recommended by UN -COPOUS and InterAgency Space Debris Coordination Committee (IADC) to the maximum possible extent.

For all Indian launch vehicles, Collision Avoidance Analysis (COLA) is performed to select collision threat-free lift-off time within the launch window. Continual assessments of any close approach risk to ISRO’s operational satellites are carried out and Collision Avoidance Manoeuvres (CAM) are performed as and when needed. In case the object posing close approach risk is another active satellite, the required coordination is carried out with the owner/operator so that only one of the satellites performs the CAM. Continual efforts to improve the operational methodologies for close approach assessment are pursued to adapt to the challenges posed by the surging space traffic, apart from modelling on-orbit break-up events and prediction of atmospheric re-entries of space objects etc.

ISRO contributes substantially to shaping the pertinent guidelines and recommendations for sustainable use of space as an active member of various international agencies dealing with safety and sustainability of outer space activities, such as IADC, IAA (International Academy of Astronautics, ISO (International Organization for Standardization), IAF (International Astronautical Federation), UN Long Term Sustainability Working Group.

The Indian Space Policy places significant importance in space debris mitigation requirements and SSA capacity building.

The recently unveiled Debris Free Space Mission (DFSM) initiative is also spearheaded by ISRO with an aim to achieve debris-free space missions by all Indian space actors, both governmental and non-governmental, by 2030. The initiative aligns with global efforts for space sustainability, positioning India as a nation prioritizing safety, security, and sustainability in outer space activities.

 

Q.No. 1544 PDF : About 'Startups in Space Sector'

 

Q.No. 1531 PDF : On benefits of space programme to state of Andhra Pradesh

0 Comments
2024/12/04
13:49 UTC

60

Shameless Indian media on ESA Proba 3

For some days, the media is projecting the proba 3 mission as ISRO proba 3 , using terms like "isro makes history" and "proud moment for India" and trying to take credit out of esa on proba 3. It's so saddening to see the Indian media overcrediting isro for just providing launch services as if it's the first time they are doing so. ISRO has a big achievement list to boast off and the media doing this is certainly disrespecting ISROs achievements. How do you guys see this?

24 Comments
2024/12/04
10:08 UTC

5

Request to update the launch schedule

u/ohsin

The "current" launch schedule has not been updated for a very long time. Please update it or link to the official "Launch Missions" page of ISRO.

Thank you.

3 Comments
2024/12/03
09:40 UTC

14

PSLV-C59: PROBA-3 Mission Updates and Discussion.

PSLV-C59/PROBA-3 launched as scheduled at 1034(UTC)/1604(IST), 05 December 2024 from First Launch Pad of SDSC-SHAR.

Live webcast: (Links will be added as they become available)

PSLV-C59/PROBA-3 Mission Page|PSLV-C59/PROBA-3 Gallery|PSLV-C59/PROBA-3 Press kit(PDF)| ESA PROBA-3 Press kit(PDF) ---|---|---|---|---|---

Some highlights:

  • Primary payload: PROBA-3 (~550 kg) by the European Space Agency to study the Sun with a pair of formation flying satellites.
  • Mission duration: 18 min. 42.48 sec. (s/c separation)
  • Target Orbit : 60530×600 km, Inclination = 59.0°
  • Launch Azimuth: 134°
  • PSLV configuration : XL (Extended length strapons)
  • 61st flight of PSLV

Updates:

Time of EventUpdate
Post-launchTwo objects cataloged. 62256 (24233A) at 59.19°, 60562.84×573.35 km and 62257 (24233B) at 59.33°, 61294.91×591.89 km
Post-launchESA press release
T + 01h50mPROBA-3 deployed its solar panels.
T + 21m00sSpacecraft telemetry received!
T + 18m42sPROBA-3 separated!
T + 16m55sPS4 thrust cut-off!
T + 14m30sPS4 performance nominal.
T + 12m00sNow receiving telemetry from Yatharagga ground station.
T + 08m20sPS4 ignited.
T + 08m12sPS3 jettisoned.
T + 06m25sPS3 burned out. Now under combined coasting mode.
T + 04m25sPS2 separated, PS3 ignited.
T + 03m05sPLF jettisoned. PS2 performing nominally.
T + 01m50sPS1 separated , PS2 ignited.
T + 01m32sPSOM XL 5,6 separated.
T + 01m10sPSOM XL 1,2,3,4 separated.
T + 00m25sPSOM-XL 5,6 ignited.
T ZeroRCT engines ignited, PS1 + PSOM XL 1,2,3,4 ignited. Lift-off!
T - 06m00sVehicle on internal power. External power withdrawn. Flight coefficient loading completed.
T - 09m30sPS2 actuation checks completed.
T - 11m00sPS3 actuation checks completed.
T - 12m30sPS4 actuation checks completed.
T - 14m30sMission Director authorizes the launch. Automatic Launch Sequence initiated.
T - 17m00sLaunch vehicle ready.
T - 19m00sNow showing launcher integration process.
T - 23m00sISRO official stream is LIVE!
T - 01h10mData flow tests completed
T - 01h22mWeather is green.
T - 07h44mCountdown commenced.
04 Dec 2024New launch time 1034(UTC)/1604(IST), 05 December 2024
T - 42m50sSCRUBBED. Launch delayed by 24 hrs due an issue with spacecraft.
T - 25h30mCountdown commenced at 14:38 IST on 3 December.
02 DecAfter Mission Readiness Review, Launch Authorization Board approves the launch. Countdown could be 25.5 hrs long.
01 DecLaunch rehearsal was conducted.
29 NovProba-3 assembly gets encapsulated.
28 NovProba-3 spacecraft stack gets integrated to launcher and launch time firms up for 4 December 2024 at 16:08 (IST) / 10:38 (UTC)
25 NovProba-3 gets transported to launch pad.
18 NovNOTAM issued for launch in early December.
07 NovProba-3 reaches SDSC-SHAR.
04 NovSpacecraft leaves Europe, reaching Chennai next day.
02 NovSpacecraft shipment gets delayed, shifting ahead launch date to 4 December.
30 OctNOTAM gets issued indicating late November launch.
04 OctESA announces initial tentative launch date of 29 November.

Primary Payload:

PROBA-3 (550 kg) : A dual satellite technology demonstration mission by ESA to study the Sun consisting of an Occulter Spacecraft (OSC) (~240 kg) and a Coronagraph Spacecraft (CSC) (~310 kg). Both 3-axis stabilized mini-satellites will precisely fly in formation within a millimetre accuracy to function as occulter and coronagraph elements of a telescope.

  • Payloads:

    • ASPIICS coronagraph
    • Digital Absolute Radiometer (DARA)
    • high-fidelity 3D Energetic Electron Spectrometer (3DEES)
  • Attitude Control:

    • 4 reaction wheels (CSC/OSC)
    • 8×1N mono propellant thrusters (CSC)
    • 12×10mN Cold Gas thrusters (OSC)
  • Orbit: A×P : 60530 × 600 km, Inclination : 59°, AoP : 188°

  • Mission life: 2 years


Note : PSLV with launch serial C59 was earlier assigned to ANWESHA (or ANVESHA) and PROBA-3 was earlier assigned to PSLV with C62 launch serial. Before this ANWESHA was assigned to PSLV-C58 but later XPoSat replaced it.

60 Comments
2024/12/02
11:44 UTC

4

Internship at VSSC

Hi everyone, has anyone received the acceptance mail for the vssc internship? I opted for dec 20th to jan 16th slot and wanted to check if the announcement for this batch have started.

0 Comments
2024/12/01
16:09 UTC

26

Chandrayaan2 Rover might be still intact : OHRC images from Sep6th/Sep7th, 2019

5 years ago I mentioned that Chandrayaan2 Rover might be still intact on the Moon's surface and my assumption might be just about right as there is new evidence from OHRC images of the Chandrayaan2 crash site taken on Sep6th/Sep7th that was published by ISRO

Chandrayaan2 landing site before and after landing

  • Left image taken around Sep6th 12:46 UTC
  • Right image taken around Sep6th 22:41 UTC (4 AM IST) ( incidence angle was around 84 deg!)
  • Long shadow might of the rover due to it's solar panels?

Solar panels would have bolted out due to the impact!

https://preview.redd.it/t129q9u3o84e1.png?width=1648&format=png&auto=webp&s=608457d093d232442420e29ad7973f47531375ae

Chandrayaan2 landing site and Chandrayaan3 Landing site

  1. Both images have similar incidence angle (around 77-78 degrees)
  2. Left side image is from LRO taken on Jan4th, 2020 (M1332771378LC)
  3. Right side image is from OHRC taken on Apr25th, 2024 ( Chandrayaan2 OHRC image)

https://preview.redd.it/nt8gcxdmo84e1.png?width=1568&format=png&auto=webp&s=9ac88e52317d40a52412446e7182cef429a0c7e8

Debris all around the Chandrayaan2 Landing site

3rd pic is North of the Landing site near to where I found a tiny white speck!

https://preview.redd.it/1ptugypzo84e1.png?width=1351&format=png&auto=webp&s=bba4141625c058d897a8725b0c91cd9eb7a809a7

https://preview.redd.it/7lolgwx0p84e1.png?width=1135&format=png&auto=webp&s=f5827e7bd97c1b2ac6699381aabd041aa2319073

https://preview.redd.it/78brfpk1p84e1.png?width=640&format=png&auto=webp&s=a28f6e5f6cba461fbc766cccedde478df7858fae

6 Comments
2024/12/01
13:35 UTC

11

Why is the quality of the Wikipedia Chandrayaan-3 article much worse than that of the Chandrayaan-2 article or Mars Orbiter Mission article?

I'm referring to the following:

  • Putting info in wrong sections. Eg - Talking about ESTRACK support and the pinging of the mini retroreflector in the History section; Talking about the C25 stage re-entering the earth in the Launch section.
  • Confusing "altitude" with "attitude". Eg - In the Vikram lander section.
  • In the Surface Operations section, no surface operations of the rover are mentioned.
  • The section mentioning the return of the propulsion module to earth orbit seems copy pasted from the ISRO website.

I am asking as to what led to a dip in the quality of the article. Any ideas?

3 Comments
2024/11/28
19:51 UTC

4

Parliamentary Q&A [27 November 2024]: Queries on status of Gaganyaan, venture capital fund by IN-SPACe and analogue mission in Ladakh.

Queries in Loksabha on 27 November 2024.

https://sansad.in/ls/questions/questions-and-answers


Q.No. 273 PDF : On ₹1000 crore venture capital fund under IN-SPACE.

Q.No. 299 PDF : On upcoming space mission and status of Gaganyaan.

Q.No. 460 PDF : On Mars analogue mission in Tibet region by ISRO.

0 Comments
2024/11/27
12:10 UTC

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