Milestone Achievement for PSLV Orbital Platform Experiment Module
The fourth edition of the PSLV Orbital Platform Experiment Module (POEM-4) has successfully completed 1000 orbits as of 4 March 2025. POEM-4, a repurposed spent upper stage of the PSLV vehicle, was deployed as part of the PSLV-C60/SPADEX Mission. The PSLV-C60 Mission was launched on 30 December 2024, with POEM-4 beginning its operations after the successful injection of the SPADEX spacecraft.
Configured as a three-axis stabilised platform, POEM-4 carried 24 payloads, including 10 from Non-Governmental Entities (NGEs) and 14 from ISRO/Department of Space (DoS). All payloads, including those from NGEs, have successfully completed their designated experiments in orbit.
Innovative Experiments Conducted in Space
It facilitated a range of scientific and technological experiments, demonstrating its capability as a cost-effective research platform. The module carried out studies in space robotics, seed germination, and bacterial growth in microgravity. It also tested green propulsion technology, laser ignition of pyro thrusters, amateur radio transmission, and advanced sensors.
Additionally, a space start-up tested the uplinking and execution of an artificial intelligence (AI) model as part of an AI lab in space, marking a significant step in space-based AI research.
Advanced Technologies Validated by POEM-4
The avionics system onboard successfully validated several indigenous technologies. A key achievement was the testing of a Mission Management Computer powered by Vikram3201, a “Made-in-India” 32-bit processor developed by ISRO. The mission also introduced the use of a Nano star sensor for the first time, enhancing the platform’s navigation capabilities.
To ensure stability and extend its operational life, it employed a reaction wheel-based attitude control system along with cold gas thrusters. This system contributed to an extended orbital life of at least 45 days compared to earlier POEM missions.
POEM-4 Sets a New Benchmark in Space Research
With the highest number of payloads carried in a single POEM mission, POEM-4 has reinforced its role as a reliable and versatile experimental platform. The mission’s success highlights India’s growing capabilities in space research and technology development, supporting a wide range of scientific advancements.