INSAT-4B was an Indian communication satellite launched by Ariane 5 in March 2007 for direct-to-home TV and other services. After nearly 14 years of work it was raised to a graveyard orbit and switched off in January 2022.
No longer operational, according to the public satellite catalogue.
INSAT-4B carried 12 high-power Ku-band transponders covering the Indian mainland and 12 C-band transponders with wider coverage. It shared the 93.5° E slot with INSAT-3A and supported direct-to-home (DTH) TV and other communication services.
It weighed 3,025 kg at launch and its solar array gave 5,859 W. It used 16 thrusters and a 440 N liquid apogee motor. An Ariane 5 launched it from Kourou in March 2007, together with the Skynet 5A satellite.
Before retiring it, ISRO moved its C-band and Ku-band services to other GSAT satellites. Between 17 and 23 January 2022, 11 engine burns raised it about 340 km above the geostationary belt, more than the 273 km minimum the debris guidelines required.
On 24 January 2022 its leftover propellant was vented, its electrical systems were made safe and it was decommissioned. ISRO says it was the 21st Indian geostationary satellite retired this way.