Green Propulsion System in Space Defence Technology


A Green Propulsion System has been developed under the Technology Development Fund (TDF) scheme of DRDO.


GS-03 (Science and technology)

Green Propulsion System?

  • It was developed by a Bengaluru-based start-up Bellatrix Aerospace Pvt Ltd (Development Agency).
  • This project uses a 1N Class Green Monopropellant for altitude control and orbit keeping of microsatellites.
  • This technology has successfully demonstrated in-orbit functionality on a payload launched by the PSLV C-58 mission.


  • This innovative technology has resulted in a non-toxic and environment-friendly propulsion system for low orbit space, unlike the conventional hydrazine-based propulsion systems that are hazardous and polluting.
  • The system consists of an indigenously developed propellant, fill and drain valves, latch valve, solenoid valve, catalyst bed, drive electronics, etc.
  • It is ideal for space missions with high thrust requirements.

PSLV-C58 mission:

  • The PSLV-C58 mission, conducted by ISRO, successfully launched the X-ray Polarimeter Satellite (XPoSat) into a low inclination orbit on January 1, 2024.
  • XPoSat represents ISRO’s maiden venture into dedicated scientific satellite missions aimed at studying X-ray polarization from celestial sources in space.
  • The primary objective of this mission is to explore and analyze the polarization of intense X-ray emissions. X-rays, falling within the wavelength range of 0.01-10 nanometers, exhibit unique properties with perpendicular electric and magnetic fields.
  • By measuring X-ray polarization, astronomers can gain valuable insights into the orientation and strength of magnetic fields within celestial bodies.
  • This research is essential for understanding various cosmic phenomena such as pulsars, regions surrounding black holes, and other sources emitting X-rays in space.