Horizons-1
| Names |
Horizons-1 |
|---|---|
| Mission type | Communication |
| Operator | Intelsat/SKY Perfect JSAT Group |
| COSPAR ID | 2003-044A |
| SATCAT no. | 27954 |
| Website |
Intelsat Page JSAT Page Galaxy 13 Page |
| Spacecraft properties | |
| Spacecraft | Horizons-1 |
| Bus | BSS-601 |
| Manufacturer | Boeing |
| Launch mass | 4,060 kg (8,950 lb) |
| BOL mass | 2,630 kg (5,800 lb) |
| Dimensions | 26.2 m × 7.0 m (86.0 ft × 23.0 ft) with solar panels and antennas deployed. |
| Power | 8.6 kW |
| Start of mission | |
| Launch date | 04:03, October 1, 2003 |
| Rocket | Zenit-3SL |
| Launch site | Ocean Odyssey |
| Contractor | Sea Launch |
| Orbital parameters | |
| Regime | GEO |
| Longitude | 127°West |
| Transponders | |
| Band |
Ku band: 24 (+8 spares) × 36 MHz C band: 24 (+8 spares) × 36 MHz |
| Bandwidth | 1,728 MHz |
| Coverage area | North America, Puerto Rico, Alaska, Hawaii and Mexico |
| TWTA power |
Ku band 108 W C band 40 W |
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Horizons-1
Galaxy 13
Galaxy XIII
Horizons-1, also known as Galaxy 13, is a geostationary communications satellite operated by Intelsat and SKY Perfect JSAT Group (JSAT) which was designed and manufactured by Boeing on the BSS-601 platform. It has Ku band and C band payload and was used to replace Galaxy 9 at the 127°West longitude. It covers North America, Puerto Rico, Alaska, Hawaii and Mexico.
The spacecraft was designed and manufactured by Boeing on the BSS-601 satellite bus. It had a launch mass of 4,060 kg (8,950 lb) and a mass of 2,630 kg (5,800 lb) at the begging of its a 15-year design life. When stowed for launch, it measured 5.7 m (19 ft) of height and 2.7 m × 3.6 m (8 ft 10 in × 11 ft 10 in) on its sides. Its solar panels span 26.2 m (86 ft) when fully deployed and, with its antennas in fully extended configuration it is 7.0 m (23.0 ft) wide.
It had two wings with four solar panels each that that used dual-junction GsAs solar cells. Its power system generated 9.9 kW of power at beginning of life and 8.9 kW at the end of its design life and had a 30-cell NiH battery for surviving solar eclipse.
Its propulsion system was composed of an R-4D-11-300 LAE with a thrust of 490 N (110 lbf). It also used had 12 22 N (4.9 lbf) bipropellant thrusters for station keeping and attitude control. For North-South stationkeeping, its primary method was an electric propulsion system with four XIPS 13, with four of the chemical thrusters acting as backup. It included enough propellant for orbit circularization and 15 years of operation.
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