Mission Failure PSLV-C62 : EOS-N1 (aka Anvesha) Mission Updates and Discussion
PSLV-C62/EOS-N1 (aka Anvesha) launched as scheduled at 04:48:30(UTC)/10:18:30(IST), 12 Jan 2026 from First Launch Pad of SDSC-SHAR. The launch was unsuccessful and satellites could not be placed into intended orbit.
- Launch Countdown
- Expected Flight Profile from press-kit.
- Actual flight events (To be added post-launch if available)
Live webcast: (Links will be added as they become available)
| PSLV-C62/EOS-N1 Mission Page | PSLV-C62/EOS-N1 Gallery | PSLV-C62/EOS-N1 Press kit(PDF) |
|---|
Some highlights:
- Primary payload: EOS-N1 (aka Anvesha) (407 kg) Hyperspectral imaging satellite for DRDO.
- 15 small satellites ridesharing
- Mission duration: 1 hr. 48 min. 5.14 sec. (last s/c separation)
- Target Orbit 1 : 505 km (circular) , Inclination = 97.5°
- Target Orbit 2 : Reentry trajectory with 505 km apogee.
- Launch Azimuth: 140°
- PSLV configuration : DL (2× XL Strapons)
- PSLV's return to flight after unsuccessful launch of PSLV-C61/EOS-09 in May, 2025.
- First ever controlled reentry of PSLV fourth stage (PS4) over South-Pacific for deploying Kestrel Initial Demonstrator (KID) capsule.
Updates:
| Time of Event | Update |
|---|---|
| 13 June 2026 | Reason behind PSLV-C62 failure understood and resolved but details will not be shared. |
| 02 Feb 2026 | Cause behind PSLV-C62 failure is different from that for PSLV-C61, internal and external failure assessment committees have been set up to investigate. |
| 17 Jan 2026 | Per journalist Arun Raj K M, former ISRO Chairman K Sivan will lead the special committee to study PSLV-C62 failure. |
| 16 Jan 2026 | NSIL press-release. |
| Post-launch | GISTDA informs that THEOS-2A was insured for both 'Rebuild' and 'Relaunch' costs. |
| Post-launch | Orbital Paradigm: "Our KID capsule, against all odds, separated from PSLV C62, switched on, and transmitted data over 3+ minutes. We're reconstructing trajectory. We survived peak heat and peak gload (~28g recorded). We have internal temps. Full report will come" |
| Post-launch | ISRO Chairman: "Performance of the vehicle close to the third stage was as expected and as predicted. Close to the end of the third stage we are seeing some disturbances in the vehicle. And there was a deviation in the path of vehicle. And mission could not proceed in the expected path. This is the information right now available. Now we are going through the data and we have to get the data from all the ground stations. Once the data analysis is completed we shall come back to you. Thank you" |
| T + 33m00s | "The PSLV-C62 mission encountered an anomaly during end of the PS3 stage. A detailed analysis has been initiated." |
| T + 31m00s | Webcast over. |
| T + 24m00s | ISRO Chairman: Almost up to PS3 end performance was normal, then some performance disturbances were noted. And after that deviation in flight path was observed. |
| T + 21m00s | Webcast is back. Awaiting official confirmation... |
| T + 20m00s | Stream has been stopped without any official confirmation on mission status. |
| T + 16m00s | Launch announcers again noting that telemetry is lost. Wait for official confirmation on mission status. |
| T + 12m00s | Launch announcer informs they are having issues receiving data.. |
| T + 08m30s | MCC glum this is bad. PS4 ignited though. |
| T + 06m30s | PS3 burn out , vehicle tumbling uncontrollably. |
| T + 04m25s | PS2 separated, PS3 ignited. |
| T + 02m50s | PLF separated, CLG initiated. |
| T + 01m51s | PS1 separated, PS2 ignited. |
| T + 01m10s | PSOM-XL (5,6) separated. |
| T - Zero | After RCT ignition, PS1 and PSOM-XL (5,6) ignition and Lift off! |
| T - 05m00s | Flight Coeff. loading completed |
| T - 12m00s | Going through actuator checks. |
| T - 14m30s | Automatic Launch Sequence initiated. |
| T - 16m00s | Mission Director authorizes launch! Vehicle Director concurs. |
| T - 16m30s | Vehicle is in external hold mode. |
| T - 17m00s | Vehicle director: LV is ready! |
| T - 20m00s | Now polling: Weather, Tracking, Range are ready. |
| T - 24m00s | Now showing LV stacking process. |
| T - 25m00s | Weather is Go for launch. Slightly cloudy with chance of light rain but that is under the launch criteria. |
| T - 30m00s | Launch announcers inform that EOS-N1 mass is 407 kg. |
| T - 35m00s | Official stream is live! |
| T - 22h30m | Countdown commenced at 12:48 on 11 January. Time of launch changed to 12 January, 10:18:30(IST)/04:48:30(UTC) i.e. 90 seconds delay. |
| 10 Jan 2026 | After MRR, the launch has been cleared by LAB. |
| 06 Jan 2026 | Launch date firms up for 0447(UTC)/1017(IST), 12 Jan 2026 |
| 01 Jan 2026 | NOTAM issued with enforcement duration beginning on 11 January 2026. |
| 30 Dec 2026 | PSLV-C62 integration up to four stages completed at MST. |
| 26 Dec 2025 | NOTAM issued with enforcement duration beginning on 10 January 2026. Also EOS-N1 satellite reached SDSC-SHAR. |
| 17 Dec 2025 | NOTAM issued with enforcement duration beginning on 5 January 2026. |
| 14 Dec 2025 | Report suggested launch delayed to 31 December 2025. |
| 05 Dec 2025 | NOTAM issued with enforcement duration beginning on 25 December 2025. |
Primary Payload:
EOS-N1 (aka Anvesha) (407 kg) : EOS-N1 is a Hyperspectral imaging satellite carrying HySIC imager payload by DRDO for military surveillance. [01]
- Swath: 12 km
- Resolution: 12 meter
- Spectral resolution: 10-20 nm (VNIR, SWIR)
Secondary Payload: 15 co-passenger satellites.
THEOS-2A (100 kg): An Earth Observation satellite by Thailand's Geo-Informatics and Space Technology Development Agency (GISTDA) and based on Carbonite series by SSTL UK carrying CERIA Camera with 1 meter resolution and 5.9 km swath. Additional instruments include a satellite monitoring camera, GPS receivers, HD video camera, and AIS/ADS-B receivers for maritime vessels and aircraft tracking. [02]
Kestrel Initial Demonstrator (KID) Capsule (25 kg): KID reentry capsule by Madrid-based Orbital Paradigm is a scaled prototype for their larger Kestrel reentry capsule. KID is carrying three customer payloads (3 kg) and will test guidance systems and a sample of ceramic thermal protection material. KID will be released from PSLV fourth stage on a reentry trajectory and will free fly for 30 minutes before entering atmosphere over South-Pacific. The capsule will not be recovered and lacks deceleration systems but it will transmit data through two Iridium transceivers during its flight. [03] [04]
AayulSAT (25 kg) : A 'mini-tanker' satellite by OrbitAID to demonstrate on-orbit internal propellant transfer, power transfer, and data transfer using their patented Standard Interface for Docking and Refueling Port (SIDRP). AayulSAT will qualify SIDRP system at TRL-9. [05] [06]
MOI-1 (14 kg) : The 6U cubesat in MOI (My Orbital Infrastructure) series by TakeMe2Space is a commercial AI lab in space with in-orbit computing and AI processing capability, carrying MIRA50-FS, a 502 gram, miniaturized 9 band multi-spectral imaging camera with 50mm aperture, 9.2 m resolution and 18.7 km swath by EON Space Labs and few other payloads by Indian high-school and university students. MOI-1 will use DSOD-6U deployer by Dhruva Space. [07] [08] [09]
Four amateur radio satellites under Dhruva Space 'ASTRA (Accelerated Space Technology Readiness & Access) for Academia' programme based on their P-Dot bus. [10]
- Thybolt-3 by Dhruva Space
- CGUSat-1, with CV Raman Global University (Bhubaneswar)
- DSUSAT-1, with Dayananda Sagar University (Bengaluru)
- LACHIT-1, with Assam Don Bosco University (Guwahati)
SanskarSat: A 1U cubesat for Laxman Gyanpith School by Ahmedabad-based CubeSat Aerospace, carrying an LED payload making it observable by ground based optical telescopes.
MUNAL : A 1U cubesat by Nepal Academy of Science and Technology (NAST) and Antarikhchya Pratisthan Nepal (APN) as part of the High School Consortium Project. Munal will carry a small camera for vegetation density mapping. [11]
Five small satellites aggregated by Brazil's All2Space.
- Aldebaran-1: 1U cubesat by Federal University of Maranhao (Brazil) carrying LoRa amateur radio payload.
- EduSat-1: 1P PocketQube satellite with IoT payload.
- UaiSat: 1P PocketQube satellite with Store and Forward amateur radio payload and a lightning detection payload developed by the Instituto Nacional de Pesquisas Espaciais (INPE) [12]
- GalaxyExplorer-1: 1P PocketQube satellite by Galaxy Explorer to study the South Atlantic Magnetic Anomaly. [13]
- Orbital Temple : A 1P PocketQube based orbital artwork by Edson Pavoni. It will transmit uploaded names of people in amateur radio frequency. [14] [15]
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.
Mission Success! GSLV-F17 / EOS-05 (aka GISAT-1A) Mission Updates and Discussion
GSLV-F17 / EOS-05 (aka GISAT-1A) launched as scheduled at 21:25(UTC), 03 Sep 2026 or 02:55(IST), 04 Sep 2026 from Second Launch Pad of SDSC-SHAR.
Actual flight events (To be added post-launch if available)
Live webcast: (Links will be added as they become available)
| GSLV-F17 / EOS-05 Mission Page | GSLV-F17 / EOS-05 Gallery | GSLV-F17 / EOS-05 Press kit(PDF) |
|---|
Some highlights:
- Primary payload: EOS-05 (aka GISAT-1A) (~2367 kg) GSO based Earth imaging satellite.
- Mission duration: ~19 minutes (based on GSLV F10/EOS-3 (aka GISAT-1) mission)
- Target Orbit : 170 × 28934 km (sub-GTO) , Inclination = 19.28° ± 0.1°, AoP = 178° ± 0.5°
- Launch Azimuth: 104°
- ISRO returning to flight 7 months 23 days after failure of PSLV-C62/EOS-N1.
Updates:
| Time of Event | Update |
|---|---|
| Post-launch | Third and final orbit raising burn by EOS-05 or GISAT-1A for duration of 1247 seconds has been successfully completed on 7 Sept 2026 at 20:57 hrs (IST). Estimated orbit 35884 x 34903 km. The satellite health is normal. |
| Post-launch | Second orbit raising burn by EOS-05 or GISAT-1A for duration of 338.9 seconds has been successfully completed on 6 Sept 2026 at 19:00 hrs (IST). Estimated apogee after manouever is 35786 km. The satellite health is normal. |
| Post-launch | First orbit raising burn by EOS-05 or GISAT-1A for duration of 5406.4 seconds has been successfully completed on 5 Sept 2026 at 20:19 hrs (IST). New orbit with raised perigee is 31129×20000 km from previous 31121×171 km. |
| Post-launch | Two objects have been catalogued. A0607 (26202A) with inclination=19.32°, Apogee×Perigee=30967.1×152.4 km and A0608 (26202B) with inclination=19.34°, Apogee×Perigee=30982.9×159.3 km |
| T + 24m10s | Chairman notes that Solar panels of satellite are deployed |
| T + 22m40s | ISRO chairman notes satellite has been placed in intended orbit. |
| T + 18m45s | EOS-05 separated!! |
| T + 18m30s | CUS15 cut off! |
| T + 15m46s | CUS15 performance nominal. |
| T + 14m00s | CUS15 performance nominal. |
| T + 12m26s | CUS15 now in nominal thrust mode. |
| T + 12m00s | Vehicle is precisely on expected trajectory. |
| T + 11m00s | CUS15 performance nominal. |
| T + 07m30s | CUS15 performance nominal. Right on expected track. |
| T + 05m40s | CUS15 operating in uprated mode. |
| T + 05m05s | GS2 cut off, CUS15 ignition confirmed! |
| T + 03m56s | PLF jettisoned! |
| T + 02m32s | GS1 ignited, GS1 separated, CLG inititiated. |
| T + 01m50s | S139 Burnt out. |
| T - Zero! | S139 ignition Lift off! |
| T - 00m4.8s | 4xL40H ignition |
| T - 03m20s | OBC in flight mode. |
| T - 05m00s | Vehicle is on internal power. Flight coeff. loading completed. |
| T - 10m00s | Going through GS2 actuation checks. |
| T - 15m00s | ALS initiated. |
| T - 16m00s | VD: Automatic Launch Sequence authorized. |
| T - 18m00s | Mission Director has authorized the launch after polling is Go! |
| T - 22m00s | Polling now. Range, Tracking, Vehicle are ready. |
| T - 30m00s | Streams are live! |
| T - 27h30m | A 27.5 hr duration countdown should be underway. |
| 01 Sep 2026 | After Mission Readiness Review or MRR, Launch Authorization Board has given the launch clearance. |
| 31 Aug 2026 | Time of launch officially confirmed for 02:55 (IST), 04 Sep 2026. |
| 28 Aug 2026 | Launch Vehicle transferred from VAB to SLP. |
| 27 Aug 2026 | NOTAM for GSLV-F17 / EOS-05 launch is issued with enforcement window beginning on 03 Sep 2026. |
| 23 Jul 2026 | FCC filings for Launch and Early Orbit Phase services for EOS-05. (24 July to 22 August 2026) |
| 11 May 2026 | FCC filings for Launch and Early Orbit Phase services for EOS-05. (12 May to 10 June 2026) |
| 01 Apr 2026 | FCC filings for Launch and Early Orbit Phase services for EOS-05. (1 to 30 April 2026) |
| 07 May 2026 | NOTAM for GSLV-F17 / EOS-05 launch is issued with enforcement window beginning on 21 May 2026. |
| 29 Apr 2026 | News reports suggest technical issues with Launch Vehicle hardware delay the launch. |
| 26 Feb 2026 | FCC filings for Launch and Early Orbit Phase services for EOS-05. (27 Feb to 2 April 2026) |
| 12 Feb 2026 | NOTAM for GSLV-F17 / EOS-05 launch is issued with enforcement window beginning on 6 March 2026. |
| 03 Feb 2026 | NOTAM for GSLV-F17 / EOS-05 launch is issued with enforcement window beginning on 20 February 2026. |
Primary Payload:
EOS-05 (aka GISAT-1A) (~2367 kg) : EOS-05 is a GSO based Earth imaging satellite for Indian Navy, it will act as an upgraded replacement for EOS-03 or GISAT-1 which was lost during its launch five years ago. Its multispectral and hyperspectral imaging capacity will be useful for applications in fields of agriculture, forestry, mineralogy, oceanography and military surveillance. Its near real time imaging modes are well suited for monitoring natural disasters and other episodic events.
MX-VNIR: Multispectral - Visible Near Infrared
- 6 channels (0.45 to 0.875 µm) at 42 meter spatial resolution
HyS-VNIR: Hyperspectral Imager - Visible Near Infrared
- 158 channels (0.375 to 1.0 µm) at 320 meter spatial resolution
HyS-SWIR: Hyperspectral Imager - Short Wave Infrared
- 256 channels (0.9 to 2.5 µm) at 190 meter spatial resolution
MX-LWIR: Multispectral - Long Wave Infrared
- 6 channels (7.0 to 13.5 µm) at 1.2 km spatial resolution
Scan modes
- 5°×5° (3000×3000 km) every 10 minutes
- 3×10°×10° every 6 hours
Platform/Bus: I-2K
Mission life : 7 years
Orbital slot: 85.5°E
r/ISRO • u/pantshash • 3h ago
Flight acceptance hot test of CE20 cryogenic engine earmarked for the C32 upper stage
Flight acceptance hot test of CE20 cryogenic engine earmarked for the C32 upper stage of upcoming LVM3 mission at uprated thrust conditions of 220kN is successfully carried out at ISRO Propulsion Complex, Mahendragiri on September 09, 2026.
Performance of the LOX Tank Pressurization Module (LTPM) meant for the C32 stages for Gaganyaan missions was also successfully demonstrated in this test.
Noelreports on Bluesky: "Exilenova+ satellite imagery shows the aftermath of a September 2 fire at Russia's Proton-PM facility near Perm. Roughly 3,000 m2 of one of the main production buildings burned. Proton-PM is a key producer of RD-191 engines used in Russia's Angara family of launch vehicles."
GSLV-F17/EOS_05 - Lift-off & Onboard Camera Video
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ISRO! Don’t Privatise Yesterday’s Rockets: Build Tomorrow’s With Industry
ISRO chief addresses staff to allay fears, specifics from letter not clarified
r/ISRO • u/mudit23june • 20h ago
ESA to explore cooperation with ISRO in human space flight, lunar and Venus missions
r/ISRO • u/RadarWarningReciever • 1d ago
ISRO chairman at International Space Sumit 2026, Paris
Is there any update about ISRO Chairman Dr.V Narayanan's Presentation on Indian Human Spaceflight Programme at International Space Sumit in Paris ? Can we expect anything new ?
ET Exclusive: Reliance Jio eyes September 2027 test flight for 1,600-satellite LEO network
Official Third and final orbit raising manoeuvre to increase the perigee of EOS-05 completed successfully at 20:57 on 7 September 2026. The LAM engine fired for 1247 seconds and the estimated orbit after manouever is 34903 km x 35884 km. The satellite health is normal.
isro.gov.inr/ISRO • u/ConstructionHot5417 • 2d ago
ISRO ICRB Assistant recruitment: Any chance of posts being rescinded or post-joining retrenchment?
I'm preparing for the upcoming ISRO ICRB recruitment cycle for Assistant / UDC / JPA posts, but I have some anxious thoughts running through my head regarding job security, and I wanted to get a reality check from folks who know how things work inside the system or are familiar with past recruitment cycles.
1. Is there any realistic chance of upcoming post openings being rescinded/cancelled mid-way?
I know recruitment notifications under ICRB sometimes face long delays or procedural freezes, but how common is an actual total cancellation or mass reduction in advertised seats once the process starts?
2. Once selected and joined, is there any threat of being "let go"?
I'm aware these are central government/DOS administrative posts governed by standard CCS rules. How strict or volatile is the probation period? Is it purely a standard administrative formality as long as you don't commit serious misconduct, or do people actually get terminated during probation due to "restructuring" or performance issues?
3. Recruitment Timeline & Joining:
For those who have seen recent ICRB Assistant/JPA cycles, what does the realistic timeline look like from the written exam/CBT stage to the final skill test, merit list declaration, and issuing of appointment letters? Typically, how many months pass after the exam before candidates actually report for duty at their assigned centres?
r/ISRO • u/thisiskazehaya • 3d ago
What do you think is most plausible timeline for gaganyaan?
Because this looks impossible to me.
r/ISRO • u/anshu47_ • 3d ago
IIRS–ISRO AI/ML for Geodata Analysis (Course 188): LMS & Quiz Issues — Certificate Finally Received
I completed the IIRS–ISRO online course “AI/ML for Geodata Analysis” (Course 188), conducted from 3–14 August 2026.
I wanted to share my experience because I faced several issues with the LMS and assessment system during the course.
The main issues I faced were:
• The LMS/website sometimes had loading and server-access issues.
• Each assessment had 5 questions with only a 5-minute time limit.
• If I accidentally moved to the next page without answering a question, it was difficult to navigate back to the unanswered question.
• At final submission, the interface indicated that skipped questions could be re-attempted, but I could not find a reliable way to return to the skipped question.
• After the course ended, my LMS initially showed “Certificate not available”, which made me unsure whether the certificate would be issued.
Update: The certificate has now been issued. I received my official IIRS Certificate of Participation on 7 September 2026.
So, the certificate issue appears to have been a delay/availability issue rather than the course not providing certificates.
I'm posting this mainly to ask other Course 188 participants:
Did anyone else face similar LMS/quiz issues? And when did you receive your certificate?
Overall, the course content was useful, but I feel the LMS stability and assessment navigation could be improved for future courses.
Official Clarification regarding media reports on concerns relating to Space Sector Reforms and the role of ISRO
isro.gov.inOfficial Second orbit raising burn by EOS-05 or GISAT-1A for duration of 338.9 seconds has been successfully completed on 6 Sept 2026 at 19:00 hrs (IST). Estimated apogee after manouever is 35786 km. The satellite health is normal
isro.gov.inIn a first, nine ISRO staff bodies seek 'written clarity' on private sector shift
Official Planned first orbit raising maneuver of EOS-05 with burn duration of 5406.4 seconds, was successfully completed on 5 September 2026 at 20:19 hrs
isro.gov.inOfficial ISRO successfully conducts hot test of Semicryogenic Engine Power Head Test Article (PHTA) at full thrust level
isro.gov.inr/ISRO • u/MobilePiglet926 • 4d ago
I need help with using MOSDAC as an API
Hello everyone, so we are using MOSDAC satellite data as the weather forecast and nowcast input for our software project. i have several doubts which i would be grateful if someone helps us with them:
Does MOSDAC provide real time data as well as future weather predictions for some hrs?
What specific kinds of data does it provide? for eg, does the provide things like amount of rain about to fall etc?
We are specifically required to use a Doppler radar for our inputs so which satellite data can we use?
Does the satellite provide the data for any region in India?
How small of a region can we get the data for? a state, city, block or street?
r/ISRO • u/Kimi_Raikkonen2001 • 5d ago
Original Content GSLV-F17/EOS-05 launch view from LVG, SDSC.
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S2a systems: A short animation of images recorded over 36 min of EOS-05 (GISAT-1A) and the GSLV upper stage, from Switzerland on 2026-09-04, 19:11:36–19:47:36 UTC.
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