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Superbird-A1, also identified as Superbird-1A before launch, was a geostationary communications satellite designed and manufactured by Ford Aerospace (now Space Systems/Loral) on the SSL 1300 satellite bus. It was originally ordered by Space Communications Corporation (SCC), which later merged into the SKY Perfect JSAT Group.[5] It had a mixed Ku-band and Ka-band payload and operated on the 158° East longitude.[1][6]
Names | Superbird-1A |
---|---|
Mission type | Communications |
Operator | Space Systems/Loral |
COSPAR ID | 1992-084A [1] |
SATCAT no. | 22253 |
Mission duration | 10 years (planned) |
Spacecraft properties | |
Spacecraft | Superbird-A1 |
Spacecraft type | Superbird |
Bus | SSL 1300 |
Manufacturer | Ford Aerospace |
Launch mass | 2,780 kg (6,130 lb) |
Dimensions | Stowed: 2.41 m × 2.58 m × 2.20 m (7 ft 11 in × 8 ft 6 in × 7 ft 3 in) Solar panels extended: 20.3 m (67 ft) |
Power | 4 kW |
Start of mission | |
Launch date | 1 December 1992, 22:48:00 UTC[2] |
Rocket | Ariane-42P H10+ |
Launch site | Cebtre Spatial Guyanais, ELA-2 |
Contractor | Arianespace |
Orbital parameters | |
Reference system | Geocentric orbit[3] |
Regime | Geostationary orbit |
Longitude | 158° East |
Transponders | |
Band | 14 Ku-band 30 Ka-band[4] |
Coverage area | Japan |
It was ordered in 1985 along Superbird-B, Superbird-A1 and Superbird-B1 on the very first order of the SSL 1300 platform.[6][7][8][9]
The spacecraft was the fourth satellite designed and manufactured by Ford Aerospace on the SSL 1300 satellite bus. It was based on the design of the Intelsat V series and offered a three-axis stabilized platform.[6][7][8][9]
It had a launch mass of 2,780 kg (6,130 lb) and a 10-year design life.[1][4] When stowed for launch, its dimensions were 2.41 m × 2.58 m × 2.20 m (7 ft 11 in × 8 ft 6 in × 7 ft 3 in). With its solar panels fully extended it spanned 20.3 m (67 ft). Its power system generated approximately 4 kW of power due to two wings with three solar panels each.[1][6] It also a NiH2 battery to survive the solar eclipses. It would serve as the main satellite on the 158°E longitude position of the Superbird.[1][6]
Its propulsion system included an R-4D-11 liquid apogee engine (LAE) with a thrust of 490 N (110 lbf).[6] It included enough propellant for orbit circularization and 10 years of operation.[6]
Its payload is composed of 14 Ku-band plus 30 Ka-band transponders.[4]
Space Communications Corporation (SCC) was founded in 1985, the same year as the original companies that later formed JSAT.[10] On 1986 SCC ordered four spacecraft, Superbird-1, Superbird-2, Superbird-A1 and Superbird-B1 from Ford Aerospace, which became Space Systems/Loral in October 1990.[8]
On 1 December 1992 at 22:48:00 UTC Superbird-A1, was launched aboard an Ariane 42P.[6] It was injected into a 192 km × 35,990 km × 7° geosynchronous transfer orbit (GTO), from which it climbed through three liquid apogee engine (LEA) firings.[1] It was positioned in its 158° East longitude position where it was integrated to the Superbird communication network.[6][11][12]
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