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| GSAT-8 | |
|---|---|
| Name | GSAT-8 |
| Operator | Indian Space Research Organisation |
| Mission type | Communications satellite |
| Spacecraft bus | I-2K |
| Manufacturer | Indian Space Research Organisation |
| Launch date | 2011-05-21 |
| Launch vehicle | Ariane 5 ECA |
| Launch site | Guiana Space Centre |
| Orbit | Geostationary orbit |
| Transponders | 24 GSO Ku-band |
| Power | 6.8 kW |
GSAT-8 GSAT-8 was an Indian communications satellite developed and operated by the Indian Space Research Organisation to provide telecommunication and broadcasting services across the Indian subcontinent and surrounding regions. The satellite carried high-power Ku band transponders to support Direct-to-Home television, VSAT networks, and maritime communications, and it was launched aboard an Ariane 5 ECA from the Guiana Space Centre in 2011. GSAT-8 complemented India's fleet of geostationary platforms including systems used by Doordarshan, Antrix Corporation, and regional operators.
GSAT-8 was part of a series of geostationary satellites developed by the Indian Space Research Organisation to expand television broadcasting and satellite communication capacity for entities such as Prasar Bharati, Ministry of Communications and Information Technology, and commercial service providers. The mission followed earlier platforms like satellites in the GSAT family and paralleled international programs by operators such as Intelsat, Eutelsat, and SES S.A. in addressing regional demand for Ku-band bandwidth. Procurement and launch contracts involved collaboration with international partners including Arianespace and launch services coordinated at the Guiana Space Centre.
The spacecraft was built on the I-2K platform by the Indian Space Research Organisation and featured a power subsystem capable of supplying peak power to transponders using solar arrays and batteries similar to those on earlier Indian spacecraft such as platforms from INSAT series. Its primary payload comprised 24 Ku-band transponders designed to serve Direct-to-Home television broadcasters like Tata Play and cable distribution networks associated with companies such as Reliance Communications and Bharti Airtel. The satellite also accommodated onboard telemetry, tracking and command subsystems compatible with ground stations operated by agencies including Antrix Corporation and nodal facilities linked to ISRO Telemetry Tracking and Command Network.
GSAT-8 rode an Ariane 5 ECA launcher provided by Arianespace from the Guiana Space Centre at Kourou, joining other dual-payload missions often pairing with satellites from operators such as Eutelsat or Intelsat. The launch campaign involved integration at facilities used for other commercial launches, with range safety and mission control support from European agencies including CNES and technical coordination with the Indian Space Research Organisation. After separation, GSAT-8 performed apogee-raising maneuvers using onboard propulsion to reach its assigned geostationary slot and underwent orbit-raising and station-keeping similar to procedures used by satellites like those of Anik and Galaxy fleets.
In operational service, GSAT-8 provided Ku-band capacity for Direct-to-Home television distribution to Indian broadcasters and supported data trunking services for corporate networks including enterprises served by providers such as Tata Communications and Bharti Airtel. The payload enabled maritime and mobile communications for commercial shipping routes in association with operators comparable to Inmarsat and regional service integrators. Mission operations were coordinated through control centers of the Indian Space Research Organisation and ground-station networks that managed telemetry, tracking and command functions comparable to international ground segments operated by Intelsat and Eutelsat.
The ground segment for GSAT-8 comprised control centers and telemetry tracking stations operated by the Indian Space Research Organisation and partner entities, with teleport facilities similar to those used by Arianespace customers and broadcasters such as Doordarshan. Coverage was optimized over the Indian subcontinent, with beams designed to serve neighboring regions across the Indian Ocean and parts of South Asia that host major population centers like New Delhi, Mumbai, Kolkata, and Chennai. Service provisioning involved coordination with national regulators and spectrum management authorities analogous to actions by International Telecommunication Union member administrations.
GSAT-8 was launched in May 2011 and entered commercial service following payload commissioning and in-orbit testing consistent with practices by operators such as Eutelsat and SES S.A.. During its operational life it provided continuity for services previously carried on older platforms from the INSAT and GSAT families and relieved capacity constraints driven by growth in DTH subscribers served by companies like Tata Play and Dish TV. Over time, as successor satellites and new Ku-band platforms were deployed by the Indian Space Research Organisation and commercial operators, capacity planning shifted to newer spacecraft analogous to the transition seen in fleets such as Intelsat and Eutelsat.
GSAT-8 contributed to India's expansion of satellite communication infrastructure established by programs including INSAT and the broader GSAT series, underpinning broadcast and broadband initiatives associated with national broadcasters like Doordarshan and telecommunications firms such as Bharat Sanchar Nigam Limited and Bharti Airtel. The mission reinforced procurement and international launch cooperation patterns exemplified by contracts with Arianespace and operational interoperability observed between agencies like CNES, ISRO Telemetry Tracking and Command Network, and commercial teleports. Its legacy informed subsequent missions and capacity growth strategies in the South Asian satellite communications market driven by rising demand from providers such as Tata Communications and multimedia platforms serving millions of subscribers.
Category:Communications satellites Category:Satellites launched in 2011 Category:Indian Space Research Organisation satellites