GSAT

The GSAT programme began as part of ISRO's efforts to supplement the aging Indian National Satellite System (INSAT) fleet and reduce reliance on leased transponders from foreign satellites. Early missions of GSAT-1 (2001) and GSAT-2 (2003) were launched to test indigenous bus designs, power systems and communication payloads. Between 2004 and 2020, ISRO launchd numerous GSAT satellites with varied roles including direct-to-home broadcasting support, tele-education and tele-medicine, high-throughput broadband, navigation augmentation for aviation, dedicated military communication. Recent missions focus on high-bandwidth Ka band systems, secure strategic communication and navigation augmentation under GPS-aided GEO augmented navigation (GAGAN). Several satellites use advanced I-2K, I-3K and 1-6K satellite bus platforms designed for long life and high payload capacity. == Launched ==

The following is a list of launched GSAT satellites and their status. As of 2025, there were 27 GSAT launches with 20 of them being operational. == Planned ==

The following is a list of six planned GSAT launches. == Statistics ==

Launches by year Launches by rocket Launches by country {{Pie chart {"value":140, "color":"#ff9933", "label": "India: 14 (51.85%)"}, {"value":120, "color":"#318ce7", "label": "France: 12 (44.44%)"}, {"value":30, "color":"#484785", "label": "United States: 1 (3.71%)"}, ] }} == See also ==