The PSLV-C51[3] is the 53rd mission of the Indian Polar Satellite Launch Vehicle (PSLV) program.

The Polar Satellite Launch Vehicle (PSLV)-C51 was launched at 04:54 (UTC) / 10:24 (IST) on 28 February 2021 with the main payload from Brazil, INPE's Amazônia-1[4][5] and 18 other ride-sharing small satellites.

It was the third flight of PSLV-DL,[3] having 2 strap-on boosters and placed the payloads in Sun-synchronous orbits.

[12] Private sector company Ananth Technologies worked with ISRO on the PSLV-C51 mission.

[15] The PSLV C51 rocket has four stages; each one was self-contained, with its own propulsion system, thereby capable of functioning independently.