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PSLV-XL | EOS-09 (RISAT-1B)
PSLV-XL | EOS-09 (RISAT-1B) launched on Sun, May 18, 2025, 12:29 AM UTC — a Indian Space Research Organization mission.
Launch FailureIndian Space Research Organization
Lifted offNET May 2025
NET Sun, May 18, 2025, 12:29 AM UTC
Live coverage
Watch the webcast
Mission profile
The flight at a glance
PSLV-XLVehicle
Indian Space Research OrganizationProvider
Satish Dhawan Space Centre First Launch PadPad
Satish Dhawan Space Centre, IndiaLocation
Government/Top SecretMission type
Sun-Synchronous OrbitOrbit
Flight sequence
Mission timeline
Key events from liftoff — ignition, staging, separation and deployment — with their times relative to T0.
- RCT IgnitionT- 00:00:03
- IgnitionT+ 00:00:00
- Booster IgnitionT+ 00:00:00
- Booster IgnitionT+ 00:00:01
- Booster IgnitionT+ 00:00:25
- Booster SeparationT+ 00:01:10
- Booster SeparationT+ 00:01:10
- Booster SeparationT+ 00:01:32
- Stage 2 SeparationT+ 00:01:52
- SEST+ 00:01:52
- Fairing SeparationT+ 00:02:33
- CLG StartT+ 00:02:38
- Stage 3 SeparationT+ 00:04:24
- Stage 3 IgnitionT+ 00:04:26
- Kick Stage SeparationT+ 00:08:13
- Kick Stage IgnitionT+ 00:08:23
- Kick Stage Cut-offT+ 00:16:52
- Payload SeparationT+ 00:17:39
- Kick Stage IgnitionT+ 00:37:12
- Kick Stage Cut-offT+ 00:45:57
- Kick Stage IgnitionT+ 01:22:33
- Kick Stage Cut-offT+ 01:31:02
- MON PassivationT+ 01:32:52
- MMH PassivationT+ 01:41:52
Flight simulation
Ascent to orbit
A representative gravity-turn climb for PSLV-XL to Sun-Synchronous Orbit. Illustrative model — not this mission’s live telemetry.
Mission timeT+0:00
Altitude0.0 km
Velocity0.00 km/s
PhaseLiftoff
T+0:00 / 8:50
SimulatedRepresentative PSLV-XL ascent profile — illustrative model, not this mission’s live telemetry.
The mission
EOS-09 (RISAT-1B)
RISAT-1B is the third in the series of radar imaging RISAT-1 satellites of ISRO using an active C-band SAR (Synthetic Aperture Radar), providing all-weather as well as the day-and-night SAR observation capability in applications such as agriculture, forestry, soil moisture, geology, sea ice, coastal monitoring, object identification, and flood monitoring, in addition to military surveillance. The RISAT-1 series is developed, manufactured and integrated by ISRO. The 3-axis stabilized spacecraft bus consists of a hexagonal prism shape build around a central cylinder. Most of the spacecraft subsystems and the payload are integrated in the prism structure and the central cylinder. The solar panels and some subsystems are mounted on the cube-shaped section of the spacecraft.
Around this launch
Related news
No news linked to this launch yet
As coverage publishes, deduplicated articles about this mission will appear here.
Good to know
Frequently asked
What time does PSLV-XL | EOS-09 (RISAT-1B) launch?
PSLV-XL | EOS-09 (RISAT-1B) is scheduled to lift off Sun, May 18, 2025, 12:29 AM UTC.
Where can I watch PSLV-XL | EOS-09 (RISAT-1B)?
Watch the official live webcast embedded on this page — it goes live shortly before liftoff.
Who is launching PSLV-XL | EOS-09 (RISAT-1B)?
PSLV-XL | EOS-09 (RISAT-1B) is an Indian Space Research Organization mission flying on a PSLV-XL.
Where does PSLV-XL | EOS-09 (RISAT-1B) launch from?
It lifts off from Satish Dhawan Space Centre First Launch Pad, Satish Dhawan Space Centre, India.