Intelsat-7A [SSL]
The nine high-powered Space Systems/Loral (SS/L) spacecraft of the Intelsat 7/7A program, which provide global dissemination of voice, video, and data transmission services, have been launched and are in orbit.
The Intelsat-7A communications payload architecture evolved from SS/L's Intelsat-5 series and consists of two independent communications subsystems, which can be cross-strapped and operate at C-band (4/6 GHz) and Ku-band (11/14 GHz). Total end-of-life solar array transmitter power generated by an Intelsat 7 is 3600 watts, while an Intelsat 7A generates 4800 Watts.
The Intelsat-7A spacecraft are based on SS/L's three-axis, body-stabilized SSL-1300 bus, whose modular design has proven its worth during some 290 years of cumulative on-orbit service, close to one-half of the total of 650 years amassed by SS/L satellites to date.
The Intelsat-7A designation identifies the three satellites that were enlarged and fitted with additional communications capacity and power. Four additional, more powerful Ku-band transponders, each with up to 73 watt TWTAs, and a fourth solar-array panel provided the added capacity.
Intelsat-7A spacecraft were launched on Ariane-44LP H10-3 and CZ-3B vehicles. Three Intelsat 7A's were actually built, but one was destroyed in a failed launch attempt.
SS/L's team members for the successful Intelsat-7A programs were Aerospatiale and Alcatel Telcom of France, Alenia, Italy, and Mitsubishi Electric Corporation (MELCO) and NEC of Japan.
Nation: | International |
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Type / Application: | Communication |
Operator: | Intelsat |
Contractors: | Space Systems/Loral (SS/L) |
Equipment: | 26 C-band transponders, 14 Ku-band transponders |
Configuration: | SSL-1300 |
Propulsion: | R-4D-11 |
Power: | 2 deployable solar arrays, batteries |
Lifetime: | 15 years |
Mass: | 4180 kg |
Orbit: | GEO |
Satellite | COSPAR | Date | LS | Launch Vehicle | Remarks | |
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Intelsat 706 | 1995-023A | 17.05.1995 | Ko ELA-2 | Ariane-44LP H10-3 | ||
Intelsat 707 | 1996-015A | 14.03.1996 | Ko ELA-2 | Ariane-44LP H10-3 | ||
Intelsat 708 | 1996-F01 | 14.02.1996 | Xi LC-2 | F | CZ-3B |