The Indian Space Research Organisation (Isro) is soliciting proposals for the twelfth cycle of observations to be made by Astrosat, India’s first space-based telescope, through its latest Announcement of Opportunities (AO).


  1. This announcement is open to Indian scientists and researchers residing and working at institutes, universities, colleges in India for 55% of time and to Non-Indian scientists and researchers, NRIs, working at space agencies, institutes, universities, colleges around the globe for 20% time, who are involved in research in the area of astronomy and are equipped to submit proposals as Principal Investigators (PIs).
  2. AstroSat is the first dedicated Indian astronomy mission aimed at studying celestial sources in X-ray and UV spectral bands simultaneously. The satellite is at 650km near-equatorial orbit with six-degree orbital inclination.
  3. AstroSat completed six years in orbit at the end of September 2021 and currently the eleventh cycle proposals are being executed. And, observations for the twelfth cycle will be carried out October 2022 to September 2023.
  4. The space agency added that after the 12-month proprietary period, the archived data will be open to registered users and will be publicly available.