Chennai, Mar 8 (UNI) In a significant achievement, the POEM-4,
the repurposed spent upper stage of the PSLV vehicle used for
PSLV-C60/Spadex Mission, has successfully completed 1,000
orbits in space.
This milestone was achieved on March 4, 2025, 64 days after
the Spadex docking experiment was launched from the SHAR
Range, Sriharikota.
In an update, ISRO said the fourth edition of the PSLV Orbital
platform Experiment Module (POEM-4), the repurposed spent
upper stage of the PSLV vehicle used for PSLV-C60/SPADEX
Mission, has successfully completed 1000 orbits on March 4.
The PSLV-C60 Mission was launched on December 30, 2024
and POEM-4 began its operations subsequent to the successful
injection of the Spadex spacecraft.
POEM-4 was configured as a three-axis stabilized platform that
carried 24 payloads, including 10 payloads from Non-Governmental
Entities (NGEs) and 14 payloads from ISRO/Department of Space.
All the payloads including those from NGEs have successfully completed
the intended experiments in orbit.
POEM-4 carried out experiments in space robotics, germination of seeds
and growth of bacterium in microgravity, green propulsion, laser ignition
of pyro thrusters, amateur radio transmission and advanced sensors.
The up-linking and execution of an AI model as part of AI lab in space was
also tested by a space start-up.
The POEM-4 avionics system also validated a Mission Management
Computer based on a “Made-in-India” 32-bit processor, Vikram3201,
with a custom architecture developed by ISRO along with the use of
a Nano star sensor for the first time to aid the navigation system.
The platform also employed a stabilization system based on reaction
wheels for attitude control along with cold gas thrusters that extended
the orbital life of the module by at least 45 days compared to previous
POEM missions.
POEM-4 carried the maximum number of payloads till date compared
to the previous three POEM missions and has yet again proved its
versatility as a cost-effective experimental platform to support diverse
payloads.
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