Service to U.S. and Latin America
| Customer | PanAmSat Corp. Wilton, Conn. |
|---|---|
| Spacecraft | Boeing 702 |
| Launch Date Vehicle Site |
June 15 2002 Sea Launch Pacific Ocean |
| Orbital Slot | 95° W Longitude |
| Contract life | 15 years |
Galaxy IIIC is one of three Boeing 702 satellites provided by Satellite Development Center for the fleet operated by PanAmSat Corporation, the world's leading commercial provider of satellite-based communications services. The satellite was ordered in August 1999, and was successfully launched on June 15, 2002 by Sea Launch.
The spacecraft will operate at both the C-band and Ku-band frequencies. Galaxy IIIC will carry 24 active transponders in C-band powered by 34-watt solid state power amplifiers (SSPAs). The satellite also will carry a total of 53 active transponders in Ku-band: 13 with 127-watt TWTAs, 24 with 120-w TWTAs, and 16 with 120-w TWTAs (which can be combined to 8 with 240-w TWTAs).
The satellite's footprint will cover the United States and Latin America, giving PanAmSat flexibility in its deployment.
The Boeing 702 is the largest and most powerful vehicle in the Satellite Development Center line, using state-of-the-art technologies in propulsion, power generation and thermal control. The company announced the 702 model in October 1995, as an evolution of its popular body-stabilized 601/601HP line. The 702 can deliver payloads with as many as 100 active transponders, in any communications frequencies that customers request. Power levels start at 10 kilowatts and climb to 18 kilowatts. The spacecraft is adaptable to medium and geosynchronous earth orbits.
PanAmSat Corporation is the premier provider of global video and data broadcasting services via satellite. Through a global network of in-orbit spacecraft and technical facilities, the company delivers entertainment and information to cable television systems, TV broadcast affiliates, direct-to-home TV operators, Internet service providers, telecommunications companies and corporations worldwide.
Satellite Development Center is the world's leading manufacturer of commercial communications satellites, and a major provider of space systems, satellites and payloads for national defense, science, and environmental applications.
GALAXY IIIC SPECIFICATIONS
| C-band | 24 active (6 spare) 36 MHz transponders (34-watt SSPAs) |
|---|---|
| Ku-band | 8 active (2 spare) 54 MHz Direct-to-Home transponders (240-watt each, configurable to 16 active/4 spare 120-watt TWTAs) 13 active (3 spare) 27 MHz transponders (127-watt TWTAs) 24 active (4 spare) 24 MHz transponders (120-watt LTWTAs) |
| Solar End of life Panels |
15 kw 2 wings each with six panels of improved triple-junction gallium arsenide (ITJ GaAs) solar cells |
|---|---|
| Batteries | 56-cells NiH, 328-Ahr |
| Liquid apogee motor |
110 lbf (490 N) |
|---|---|
| Xenon Ion Propulsion System (XIPS) Transfer orbit Attitude control |
4 x 0.037 lbf (0.165 N) 4 x 0.018 lbf (0.08 N) |
|
1 85-in. dual-gridded shaped reflector 1 55-in. dual-gridded shaped reflector 1 45-in. dual-gridded shaped reflector 2 112-in. single surface reflectors |
| In orbit | L, solar arrays: 157 ft (48 m) W, antennas: 31 ft (9.4 m) H, antennas: 24 ft (7.3 m) |
|---|---|
| Stowed | H: 24 ft (7.3 m) W: 10.5 ft x 10.8 ft (3.2 m x 3.3 m) |
| Mass Launch In orbit (beginning of life) |
10,710 lb (4,860 kg) 6,330 lb (2,873 kg) |
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