Arabsat-1A

Arabsat-1A

Mission type	Communication
Operator	Arabsat
COSPAR ID	1985-015A
SATCAT no.	15560
Mission duration	7 years
Spacecraft properties
Bus	Spacebus 100
Manufacturer	Aérospatiale
Launch mass	1170 kg
Dry mass	532 kg
Start of mission
Launch date	8 February 1985, 23:22:00 UTC
Rocket	Ariane 3
Launch site	Kourou, ELA-1
Contractor	Arianespace
End of mission
Deactivated	March 1992
Orbital parameters
Reference system	Geocentric
Regime	Geostationary
Longitude	19.0° East
Perigee altitude	33911 km
Apogee altitude	35849 km
Inclination	0.2°
Period	1390.1 minutes
Epoch	8 February 1985
Transponders
Band	2 S-band 25 C-Band

Arabsat-1A (Arabic: عربسات-A1)^[1] was a Saudi Arabian communications satellite which was operated by Arab Satellite Communications Organization. It was used to provide communication services to the Arab States. It was constructed by Aérospatiale, based on the Spacebus 100 satellite bus, and carries two NATO E/F-band (IEEE S band) and 25 NATO G/H-Band (IEEE C band) transponders. At launch, it had a mass of 1,170 kilograms (2,580 lb), and an expected operational lifespan of seven years.^[2]

Arabsat-1A was launched by Arianespace using an Ariane 3 rocket flying from ELA-1 at Kourou. The launch took place at 23:22:00 UTC on 8 February 1985.^[3] It was the first Spacebus satellite to be launched. Immediately after launch, one of its solar panels failed to deploy, resulting in reduced performance. It was placed into a geosynchronous orbit at a longitude of 19.0° East.^[4] Following a series of gyroscope malfunctions, it was retired from active service, and remained operational as a backup.^[2][5] In September 1991, another problem developed with the spacecraft's attitude control system, and it began to drift eastward. It failed completely in March 1992.^[6]

See also

• 1985 in spaceflight

References