/r/ISRO

Photograph via //r/ISRO

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


2025 Tentative Launch Schedule

Updated on 26 January 2025

Vehicle Payload Date
GSLV-F15 NVS-02 06:23 (IST) / 00:53 (UTC), 29 January [1] [2]
LVM3-M5* BlueBird-6 (AST SpaceMobile) NET March 2025 [1] [2] [3] [4]
PSLV N1 TDS-01 Q1 2025 [1] [2]
HLVM3-G1 Gaganyaan (Uncrewed) Q2 2025 [1] [2]
TV-D2 ACES abort Q2 2025 [1] [2]
GSLV-F16 NISAR Q2 2025 [1] [2]
PSLV-C## Oceansat-3A NET July 2025 [1] [2]
PSLV-C## ??? (Anvesha or RISAT-1B) 2025 [1] [2]
GSLV-F## GISAT-2 2025 [1] [2]
GSLV-F## IDRSS-1 2025 [1] [2]
SSLV-S01 ??? 2025 [1] [2]

*Procured Launch / Commercial Payload


DoS Annual Report 2023-24

Archived Annual Reports and Outcome Budgets


Few Official Links:

ISRO Official Twitter Facebook Youtube Instagram

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


Other Subreddits:

/r/Spaceflight /r/Astronomy
/r/Space /r/AstroPhotography
/r/Arianespace /r/Telescopes
/r/SpaceX /r/cubesat
/r/ULA /r/Satellites
/r/BlueOrigin /r/heavensabove/
/r/RocketLab /r/satellitewatching
/r/OrbitalATK /r/engineteststands
/r/ESA /r/rocketry
/r/NASA /r/TMRO
/r/ISS /r/rocketlaunches
/r/JAXA /r/solar_system
/r/Orbitalpodcast /r/SpacePolicy
/r/legoRockets /r/SpaceflightArt
/r/MastenSpace /r/remotesensing
/r/AmateurSatellites /r/IndiainSpace
/r/IIST -

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

/r/ISRO

432,205 Subscribers

7

High resolution satellite images <5m

Not sure if this is the right sub, I tried to download high-resolution satellite images(<5m) of my village for 2019, but Bhoonidhi quotes 7K. Is there a cheaper alternative and which satellite and image spectrum to choose for best result?

2 Comments
2025/02/03
16:14 UTC

40

Just posting this render of NVS-01 from its press-kit to have an idea on its overall configuration.

1 Comment
2025/02/03
11:54 UTC

16

Is ISRO Joining the International Lunar Research Station (ILRS) Program?

I heard that Roscosmos (Russia) has invited India’s ISRO to join the ILRS program, where they are building a lunar space station. Currently, Roscosmos and CNSA (China) are working together on this project, and they have also invited other BRICS countries to participate. Since India is the only one among them with an active space agency, I think ISRO should definitely get involved. This could not only help India gain valuable experience but also push our technology forward.

But, I haven’t seen any recent updates on this yet. Does anyone have more information? What do you all think—should ISRO join the ILRS program, and why or why not?

22 Comments
2025/02/03
05:32 UTC

34

GSLV-F15/NVS-02 : Orbit raising operations on hold "as the valves for admitting the oxidizer to fire the thrusters for orbit raising did not open."

Source: https://www.isro.gov.in/GSLV-F15_NVS-02_Mission.html

Update on GSLV-F15/NVS-02 Mission ( Dated 02/02/2025)

ISRO successfully completed a century in the launches from its spaceport at Sriharikota on January 29, 2025 with the 17th launch of GSLV. In this mission NVS-02 navigation satellite was successfully injected into the intended Geosynchronous Transfer Orbit. All the launch vehicle stages performed flawlessly and the orbit was achieved with a high degree of precision.

Subsequent to the launch, the solar panels on board the satellite were successfully deployed and power generation is nominal. Communication with the ground station has been established. But the orbit raising operations towards positioning the satellite to the designated orbital slot could not be carried out as the valves for admitting the oxidizer to fire the thrusters for orbit raising did not open.

The satellite systems are healthy and the satellite is currently in elliptical orbit. Alternate mission strategies for utilising the satellite for navigation in an elliptical orbit is being worked out.

40 Comments
2025/02/02
13:16 UTC

19

Axiom-4 Mission | Full Crew Press Conference

1 Comment
2025/02/02
10:19 UTC

13

2nd Indian in Space: Group Captain Shubhanshu Shukla to Go to ISS

0 Comments
2025/02/01
10:00 UTC

21

Budget for Department of Space in 2025-26 session.

Union Budget 2025-2026 is out!

https://www.indiabudget.gov.in/index.php

Notes on Demands for Grants, 2025-2026 Department of Space [PDF] [Archived]

Outcome Budget 2025-2026 : [PDF] [Archived] at Page 259

Economic Survey 2024-2025 : [PDF] [Archived] at Page 232

 

Here are numbers(in crores of Rupees) for Dept. of Space

Budget 2025-2026

RevenueCapitalTotal
7312.576103.6313416.20

Revised 2024-2025

RevenueCapitalTotal
6997.384728.3711725.75

Budget 2024-2025

RevenueCapitalTotal
7475.225567.5313042.75

Budget 2023-2024 (Actuals)

RevenueCapitalTotal
6307.324396.7510704.07

6 Comments
2025/02/01
09:33 UTC

22

NVS-2 failure

Heard that NVS-02 is having power failure. Does anyone have more details about this

20 Comments
2025/02/01
05:44 UTC

8

Spantrik. Credible or not?

Hi everyone, sorry if I am breaking any rules by posting this. I read an article about spantrik and got to know that they are aiming to develop a reusable rocket. The specs for the rocket on their website look not too shabby and after scrolling through their twitter I think they have actually put in some great 'real' work.

The question is that does this company seem credible to those of you familiar with the Indian space tech ecosystem? My heart has been burned too many times by empty promises and exaggerated claims that lead to nothing. Does this company have the potential to succeed?

5 Comments
2025/02/01
02:34 UTC

19

Spacefields Latest Aerospike Engine Test - Why No Mach Diamonds?

So I saw the new video posted by Spacefields yesterday on their latest test of their aerospike engine.

I'd like to know how come the engine tests by Indian rocket teams never seem to feature the nifty mach diamonds or mach rings that we always see accompanying engine tests done by others?

For instance, here's a video from a guy who made his own aerospike engine. I also found his explanation of his work to be more informative and illuminating, without giving me a headache or breaking my eardrums.

14 Comments
2025/01/30
12:16 UTC

314

ISRO GSLV F15 NVS02 lift off caught from Chennai 01/29/2025, 6:23AM

10 Comments
2025/01/29
14:26 UTC

26

Report on 'Space Research in India' for 45th COSPAR Scientific Assembly 2024

Report on 'Space Research in India' (January 2022 to December 2023) for 45th COSPAR Scientific Assembly (13 to 21 July 2024)

[PDF] [Archived]

***

Apparently they tested the composite panel for Gaganyaan White Room during the launch of PSLV-C52 by rigging it and placing on the roof of building next to FLP!

Development of White room sandwich panel and qualification

  • Al-PUR Composite panel (with Aluminium facing on either side & Polyurethane foam as core) assembled with Aluminium frames was developed as wall material for White room at launch pad for Gaganyaan mission.
  • Mechanical tests are performed to obtain its flatwise tensile, compressive, core shear and flexural properties and also tested in thermal humidity testing chamber at elevated temperatures.
  • Whereas the effects of dynamic parameters like acoustics, vibration, heat flux, over pressure, air and face temperatures which usually controls the structural integrity during Launch environment are investigated during PSLV launch and solid motor static test. Post-test, panel was Ultrasonic tested to verify its integrity and was qualified.

White Room config, qualification tests and results

Zooming in

Source image from PSLV-C52 gallery : https://www.isro.gov.in/media_isro/image/media/Missions/PSLV/more/PSLV52/gallery/yrnl3542.jpg.webp

2 Comments
2025/01/29
11:25 UTC

32

GSLV-F15/NVS-02 post-launch press conference.

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

  • NISAR: Spacecraft is ready,willbe moved to SHAR shortly. Launch may be in couple of months.
  • NavIC: Four satellites are operational for PNT services. Apart from five already approved, one more NVS satellite might need approval. Aiming to launch them every five or six months.
  • SpaDeX 60-70% propellant still remaining. Power transfer still not done. They intend to take their time with it.
  • SAC Director: NVS-02 carries 1 indigenous and 3 imported clocks. Gaining confidence on indigenously developed atomic clocks and in future will replace imported clocks with these. Also looking to transfer the technology to local firm to bring down costs.
  • Gaganyaan-G1: HLVM3 stages,CES are in SHAR. TV-D2 inflight abort will be conducted in few months from now, IADT drop tests two months from now.
  • LOX Methane engine development: Preliminary design and early developmental tests completed. Detailed engineering in progress, hoping the development and testing activities will begin in this year itself.
12 Comments
2025/01/29
03:29 UTC

451

GSLV-F15 into the space

Spotted from chennai..

10 Comments
2025/01/29
01:12 UTC

1

Lack of academia support for project.

Hi everyone. I have founded a team in my college for research and manufacturing products for space. But none of my professors are interested. They are more focused on just completeing their coursework. But what about my projects ? How about you provide me with a NOC to engage with the industry or develop my lab using my own money ? No ! 75 % attendance chahiye. Plus its an "institute of national importance".

1 Comment
2025/01/27
21:01 UTC

1

Abyom Space Tech

Does anybody know anything much about Abyom Space Tech ?

After visiting their website (see link above), scrolling down toward the bottom, we can see 3 different launch vehicle concepts. The launch dates for each of them seem to have been pushed back.

Their opening idea for a reusable sounding rocket seems very intriguing, as it represents lower hanging fruit from a technical standpoint. However, I'm not sure what the market or business case is for sounding rockets, though.

If anyone has any information on them, it would be nice to hear more. I'm really interested in learning more about them.

8 Comments
2025/01/27
14:54 UTC

366

GSLV-F15: Another better look at zipline cables and extension platform.

12 Comments
2025/01/27
10:48 UTC

18

Exclusive: In Conversation with ISRO Chief, Dr. V. Narayanan

Interview of Dr. V. Narayanan

2 Comments
2025/01/26
08:42 UTC

Back To Top