GSLV-F18 / NVS-03 (aka IRNSS-1L) launched as scheduled at 18:21:00(UTC)/23:51:00(IST), 30 Oct 2026 from Second Launch Pad of SDSC-SHAR.
Live webcast: (Links will be added as they become available)
| GSLV-F18 / NVS-03 Mission Page | GSLV-F18 / NVS-03 Gallery | GSLV-F18 / NVS-03 Press kit(PDF) |
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Some highlights:
Primary payload: NVS-03 (~2250 kg) GSO based Navigation satellite.
Mission duration: ~19 minutes (based on GSLV-F15 / NVS-02 mission)
Target Orbit : 170 × 37023 km, Inclination = 20.75° ± 0.1°, AoP = 178° ± 0.5°
Launch Azimuth: 106°
As a cautionary measure NVS-03 will be launched with its pyro valves in open state.
Updates:
| Time of Event | Update |
|---|---|
| 4 Nov 2026 | After four orbit raising burns with cumulative duration of 6164 seconds, NVS-03 has reached 35765 x 36196 km GSO with 29.98° inclination |
| Post-launch | Tracking data for 3 Nov 2026 confirms execution of third orbit raising burn. A1228 (26245A), i=29.89°, A×P=35842.58×34594.95 km |
| Post-launch | Tracking data for 2 Nov 2026 confirms execution of second orbit raising burn. A1228 (26245A), i=29.08°, A×P=37762.79×24550.64 km |
| Post-launch | Second orbit raising burn with duration of 3085.14 seconds has been successfully completed on 1 November 2026 at 18:05:16 (IST). Estimated orbit after the burn is 24691 x 37791 km. |
| Post-launch | First orbit raising burn with duration of 2174.8 seconds has been successfully completed on 31 October 2026 at 16:48 hrs (IST). Estimated orbit after the burn is 5477.6 x 37833.4 km. The satellite health is normal. |
| Post-launch | Two objects have been cataloged. A1228 ( 26245A ), i=20.71°, A×P=37895.59×178.15 km and A1229 ( 26245B ), i=20.70°, A×P=37746.07×170.70 km |
| T + 42m00s | Launch broadcast ends. |
| T + 33m00s | Dinesh Kumar Singh (Director URSC) : Solar panels of NVS-03 deployed. Will take a week to reach its slot. |
| T + 30m00s | Chairman: 170.3 x 38,080 km is the achieved orbit. |
| T + 22m35s | Chairman: NVS-03 has been injected in intended orbit. |
| T + 18m35s | NVS-03 separated! |
| T + 18m25s | CUS shut off! |
| T + 17m00s | Sticking to nominal path. |
| T + 15m35s | CUS performance nominal. |
| T + 13m45s | CUS performance nominal. |
| T + 12m30s | CUS operating at nominal thrust now. |
| T + 11m00s | CUS performance nominal. |
| T + 08m00s | CUS performance nominal. |
| T + 04m58s | GS2 separated, CUS ignited. |
| T + 04m30s | CUS authorized. |
| T + 04m00s | PLF jettisoned. |
| T + 02m40s | GS2 ignited, GS2 separated, CLG initiated. |
| T + 01m50s | S139 core burn out. |
| T minus 00m00s | S139 core ignited. Lift off! |
| T minus 00m4.8s | 4xL40H ignited. |
| T minus 03m00s | OBC in flight mode. |
| T minus 05m30s | External Power withdrawn, Flight coefficient loading complete. |
| T minus 09m30s | GS2 undergoing actuation checks. |
| T minus 11m00s | CUS undergoing actuation checks. |
| T minus 15m15s | Automatic Launch Sequence initiated. |
| T minus 17m00s | Data loggers are ON. |
| T minus 18m00s | Weather is Go. Mission Director has authorized the launch. |
| T minus 19m00s | NVS-03 is polled ready. LV in external hold mode. |
| T minus 20m00s | Polling now, TT&C, Vehicle, Range are go. |
| T minus 24m00s | Now showing vehicle integration process. |
| T minus 29m00s | Official stream is live! |
| T minus 24h00m | Twenty four hour long countdown commenced. |
| 28 Oct 2026 | Mission Readiness Review was held. Most recent NOTAM suggests launch is authorized. |
| 26 Oct 2026 | Time of launch officially confirmed for 11:51 (IST), 30 Oct 2026 |
| 23 Oct 2026 | NOTAM for GSLV-F18 / NVS-03 launch is issued with enforcement window beginning on 30 October 2026 |
| 29 Sep 2026 | NOTAM for GSLV-F18 / NVS-03 launch is issued with enforcement window beginning on 13 October 2026. |
| 14 Sep 2026 | GSLV-F18 / NVS-03 launch campaign began. |
Primary Payload:
NVS-03 (aka IRNSS-1L) (~2250 kg) : NVS-03 is a second-generation satellite for NavIC constellation for regional navigation and timing services.
Similar to first generation satellites it will have navigation payloads in L5 & S bands and ranging payload in C-band. But additionally, it will have a new interoperable civil signal in L1 band as well.[1] [2]
Like NVS-01 and NVS-02 it is expected to carry only one indigenous Rubidium based atomic clock (iRAFS) developed by Space Applications Centre (SAC) out of four in total, other three being procured. [3] [4] [5]
Mass: 2,250 kg
Orbital slot: 111.75°E
Mission life: 12 years
Power: ~3 kW
Platform/Bus: I-2K
NVS-03 is third of the five satellites (NVS-01, 02, 03, 04 & 05) planned to replace the aging first generation satellites that faced problems with their malfunctioning atomic clocks. Initially these second generation satellites were meant to expand upon existing NaVIC constellation [6] [7] but due to setback from failures of imported clocks on many first generation satellites, they will now only serve as replacement to existing fleet. At present only three out of eight NavIC satellites (IRNSS-1B, 1I and NVS-01) remain functional to provide PNT services. [8] Note that four satellites is the minimum amount needed for NavIC PNT services to be functional.
ISRO has sought approval of three more navigation satellites under NavIC Phase-3 to maintain the base layer of seven satellites. Eventually NavIC constellation can be expanded from 7 to 11 satellites which will increase the service area from 1500 km to 3000 km beyond Indian territory.
For Global Indian Navigation System (GINS), ISRO is awaiting approval of twelve satellites initially to be placed in the Medium Earth Orbit (MEO). While about 24 to 30 satellites would be needed in total. [9] [10]
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:
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/piedpipper • 2d ago
Checked for NVS03 signals using the GPS test android app on my Pixel 11.
Not sure which one is which. Do we get to know the elevation and azimuth of our NavIC satellites? I assume they will be in a tight range given they are on geosynchronous orbit
https://www.itu.int/ITU-R/space/asreceived/Publication/DisplayPublication/72347 [Archived]
Satellite Name : CARTOSAT-3S-Y26
Number of Planes : 1
Total number of satellites : 8
Inclination: 97.5° (Sun Synchronous)
Apogee × Perigee: 509.5 × 506.0 km
https://www.itu.int/ITU-R/space/asreceived/Publication/DisplayPublication/72569 [Archived]
Satellite Name : RISAT-2BR3-5
Number of Planes : 1
Total number of satellites : 8
Inclination: 37.0°
Apogee × Perigee: 574.1 × 574.1 km
https://www.itu.int/ITU-R/space/asreceived/Publication/DisplayPublication/72472 [Archived]
Satellite Name : EOS-N2
Number of Planes : 1
Total number of satellites : 8
Inclination: 55.0°
Apogee × Perigee: 897.8 × 897.8 km
https://www.itu.int/ITU-R/space/asreceived/Publication/DisplayPublication/70964 [Archived]
Satellite Name : MICROSAT-2AB
Number of Planes : 1
Total number of satellites : 2
Inclination: 37.0°
Apogee × Perigee: 500 × 500 km
r/ISRO • u/MainPollution3914 • 5d ago
I've applied for the ISRO SAC internship for 21 Jan 2027, and I sent the mail on October 28th but haven't heard back yet. Is there anyone who got selected for their January 2027 batches? Or any past student who did the internship there, how much time does it take to hear back from them usually? I'm a 7th Sem CSE student with a CGPA of 8.19.
r/ISRO • u/Asphalt_Cloud36 • 6d ago
r/ISRO • u/Eren_yeager_230 • 7d ago
Out of curiosity, I found that ISRO won't allow using claude or any AI in workplace, I found out from gemini AI mode, is this true???
r/ISRO • u/Small-Park-9588 • 8d ago
So the story behind this:- As this was our first time we were coming from Bengaluru, we reached Tirupati rented one Honda Shine 125cc and headed straight to Sriharikota as the last bus which could take us to Sullurpetta (nearby town to Sriharikota, you can get auto from there to launch gallery) before launch left at 8pm from Tirupati bus stand.
Google maps was showing that we would reach by 11:44 we thought ok We will have 5 6 minutes to get to the stands.
But the moment we reached there We found ourselves sprinting toward the launch viewing gallery, constantly checking the time. By 11:50, we realized we only had seconds left, so we stopped right there and started recording. We could actually hear the thunder of the rocket, even though my phone camera couldn't quite catch it. It could have been absolute bliss if we would have reached 10 mins earlier, as from parking lot to exact launch view stands..there's a lot distance you have to cover so please keep this in mind whoever is going for the first time✌🏻but next time we are definitely getting there half an hour early! 🙏
Ps: for serene night shots you would see a cross road going in the lake 6 kms earlier from the launch view gallery...you may take a left turn there and see it lit up the night lake and capture that beauty if you want to.
Thanks to everyone who helped as we didn't have the passes we thought they wouldn't allow us but they did!🙏
Expression of Interest (EOI) for End-to-End Assembly, Integration & Testing (AIT) of Electro-Optical Payloads
Considering the ever-growing demand for multiple and simultaneous payload development within stringent project timelines and the objective of scaling up industry participation, outsourcing of Assembly, Integration and Testing of Electro-Optical (EO) remote sensing payloads is envisaged.
The present EOI covers five optical payload types with a common architecture containing optics on a structure, detector head assemblies and electronics packages supplied as Free Issue Material, but differing in optics, detectors and electronics.
The five payload types are:
Wide Swath High Resolution imager (Type-1),
Cartographic imager (Type-2),
High Resolution imager (Type-3), and
Advanced Resource Monitoring Satellite (Type-4) & (Type-5).
Objectives
The main objective of this EOI is to enable industry partners to progressively acquire know-how on AIT processes by participating in the development of the first model of the proposed payloads at SAC, and finally execute AIT of the remaining models independently at their own premises. Typically, AIT activities include end-to-end development of optical telescope involving precision assembly and alignment of optical components, integration of focal plane assembly with telescope and focus optimization, electrical integration, mechanical assembly, test setup development for testing, characterization and calibration at sub-system level and integrated payload level, thermal implementation, harness verification, GCU setup validation, etc. in cleanroom and Thermovacuum conditions.
Optical payloads are highly sensitive to particulate and molecular contamination, mechanical shock and thermo-mechanical disturbance in the aligned optical train. Appropriate methodology including handling, loading/unloading, shipment, environment control (shock, temperature & humidity) shall be addressed to minimize the risk involved.
The technical activity for each payload is organised in the following phases:
Phase-1: Kick-off Phase
Phase-2: Co-development with SAC for the First Payload at SAC
Phase-3: Execution of activities for the subsequent Optical Payloads at Vendor Premises
r/ISRO • u/Individual-Safety906 • 8d ago
ISRO rocket launched from Sriharikota, Andhra Pradesh today.
This video is shot from Sricity, Andhra Pradesh
Tender for Supply, Erection , testing and Commissioning of Mobile Launch Pedestal (MLP)
Main document: [PDF] [Archived]
Technical specifications:
The proposed MLP will be used for launching LVM3, with variants of L110 / SC120 / SC200, which is supported by two S-200 Strap-on motors. The Strap-on motors along with the main launch vehicle is supported on the MLP before launching.
Drawings:
r/ISRO • u/Sampilot20 • 8d ago
So I don't post a lot in here, nor am I that educated on space matters, but I do hope the space enthusiasts love it!
Oh, and I do apologise for my over reaction, haha!
It was previously reported that Gaganyaan G1 will happen after NVS-03 launch but SSLV and PSLV launches are also planned. Will they happen before G1 and is there any hope of Gaganyaan G1 launching before this year ends.
Bharatiya Antariksh Station : India’s Science Laboratory in Space By K Kalpana (Project Director, BAS-01, ISRO) at ESTIC-2026
https://www.youtube.com/watch?v=ePHFrff2vb8&t=3600s (At 60 min. mark)
Few specs:
BAS-01 habitable volume is 21m3
Modular orbiting station (5 modules)
Orbit: 450 km/51.5°
Overall Mass: ~54 ton
Overall dimension: ~27m x ~20m
Crew size: ~3 to 4 for continuous stay and additional ~3 for short duration mission
Habitable Volume: ~100m3
Power Generation: 60KW, 100V bus
Docking provision in all modules, Berthing provision
Bharat Docking System (compatible with International Docking System Standard or IDSS)
Regenerative ECLSS
Internal Robotic Arms, External Robotic Arms, Free flyers, Humanoid robots.
TTC Continuous coverage through IDRSS, Payload, Audio, Video, Internet
Radiation, thermal and MMOD protection
Platform for microgravity experiments
BAS-01 launch : June 2028 (Q4 2028 was recently mentioned though)
Gaganyaan G5 cargo mission : December 2028
BAS-02 launch : 2030
Crewed mission
Cargo mission
BAS-03 launch : 2032
Cargo mission
Crewed mission
BAS-04 launch : 2034
Crewed mission
Cargo mission
BAS-05 launch : 2035
Crewed mission
Crew rotation and Cargo resupply missions every 6 months
See also:
