GSAT-17 is an Indian communications satellite.

It additionally carries a dedicated transponder for data relay (DRT) and search-and-rescue (SAR) services.

[7] At the time of launch, GSAT-17 was the heaviest satellite built by ISRO.

[8] The satellite was launched on 28 June 2017 aboard an Ariane 5 ECA rocket from the Guiana Space Centre in Kourou, French Guiana.

[1][2][9] GSAT-17 is the 21st satellite from ISRO to be launched by Arianespace.