JCSAT-1
| Mission type | Communication |
|---|---|
| Operator | JSAT Corporation |
| COSPAR ID | 1989-020A |
| SATCAT № | 19874 |
| Spacecraft properties | |
| Spacecraft | JCSAT-1 |
| Bus | HS-393 |
| Manufacturer | Hughes |
| Launch mass | 2,280 kg (5,030 lb) |
| BOL mass | 1,364 kg (3,007 lb) |
| Dimensions | 3.7 m × 10 m × 2.3 m (12.1 ft × 32.8 ft × 7.5 ft) with solar panels and antennas deployed. |
| Power | 2.2 kW |
| Start of mission | |
| Launch date | 23:29:00, March 6, 1989 |
| Rocket | Ariane 44LP |
| Launch site | Kourou ELA-2 |
| Contractor | Arianespace |
| End of mission | |
| Disposal | placed in a graveyard orbit |
| Deactivated | 1998 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Inclined geosynchronous |
| Semi-major axis | 42,373 km |
| Perigee | 35,987.0 km |
| Apogee | 36,018.1 km |
| Inclination | 14.5° |
| Period | 1,446.8 minutes |
| Epoch | 00:00:00 2016-08-16 |
| Transponders | |
| Band | Ku band: 32 × 27 Mhz |
| Bandwidth | 864 MHz |
| TWTA power | 20 Watts |
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JCSAT-1 was a geostationary communications satellite designed and manufactured by Hughes (now Boeing) on the HS-393 platform. It was originally ordered by Japan Communications Satellite Company (JCSAT), which later merged into the JSAT Corporation. It had a Ku band payload and operated on the 150°E longitude until it was replaced by JCSAT-1B.
The spacecraft was designed and manufactured by Hughes on the HS-393 satellite bus. It had a launch mass of 2,280 kg (5,030 lb), a mass of 1,364 kg (3,007 lb) after reaching geostationary orbit and an 8-year design life. When stowed for launch, its dimensions were 3.4 m (11 ft) long and 3.7 m (12 ft) in diameter. With its solar panels fully extended it spanned 10 m (33 ft). Its power system generated approximately 2,350 Watts of power thanks to two cylindrical solar panels. It also had a two 38Ah NiH2 batteries. It would serve as the main satellite on the 150°E longitude position of the JSAT fleet.
Its propulsion system was composed of two R-4D LAE with a thrust of 490 N (110 lbf). It also used two axial and four radial 22 N (4.9 lbf) bipropellant thrusters for station keeping and attitude control. It included enough propellant for orbit circularization and 8 years of operation.
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