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Arabsat 1A, 1B, 1C / Insat 2DT

Arabsat 1A [Aerospatiale]

The three Arabsat 1 spacecraft are based on the Aerospatiale and MBB Spacebus-100 platform. Ranging from nearly 600 kg to almost 800 kg at the start of life in GEO, the spacecraft measure 1.5 m by 1.6 m by 2.3 m with a solar array span of about 21 m for 1.4 kW of electrical power. The primary communications payload consists of two S-band transponders and 25 C-band transponders. The nominal design life was seven years.

Arabsat 1A was launched by Ariane on 8 February 1985 but immediately suffered a solar panel extension malfunction. Other failures quickly relegated the spacecraft to backup status until late 1991 when the vehicle was abandoned. Arabsat 1B was launched by the U.S. Space Shuttle and was operated near 26 degrees E from June, 1985, until the summer of 1992 when it, too, no longer continued station-keeping operations. Arabsat 1C was launched by Ariane on 26 February 1992 and was still on station near 31 degrees E at the end of 1994. Later it was transferred to Insat as Insat 2DT.

Nation: Saudi Arabia
Type / Application: Communication
Operator: Arabsat
Contractors: Aerospatiale, MBB
Equipment: 25 C-band transponders, 2 S-band transponders
Configuration: Spacebus-1000
Propulsion: R-4D-11 (#1A, 1B); S400 (#1C)
Power: 2 deployable solar arrays, batteries
Lifetime: 7 years
Mass: 1170 kg (#1A), 1270 kg (#1B), 1360 kg (#1A),
Orbit: GEO
Satellite COSPAR Date LS Launch Vehicle Remarks
Arabsat 1A 1985-015A 08.02.1985 Ko ELA-1 Ariane-3 with Brasilsat A1
Arabsat 1B 1985-048C 17.06.1985 CC LC-39A Shuttle [PAM-D] with Discovery F5 (STS 51-G), Morelos 1, Telstar 303, Spartan 101-F1
Arabsat 1C → Insat 2DT 1992-010B 26.02.1992 Ko ELA-2 Ariane-44L H10 with Superbird B1

References:

Further Arabsat missions:
Further Insat missions: