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Skynet 2A, 2B

Skynet 2A [Marconi]

The Skynet 2 satellites were built by Marconi Space and Defence Systems with assistance from Philco-Ford. They were spin-stablised and massed 240 kg. Skynet 2 used two communications channels, one at 20 MHz and the other at 2 MHz.

Skynet 2A was lost in an unsuccessful launch attempt in January, 1974. However, the spin-stabilized, 240 kg Skynet 2B was successfully orbited in November, 1974. Remarkably, Skynet 2B was still operating 20 years after it was launched.

Nation: UK
Type / Application: Military communication
Operator: MoD
Contractors: Marconi Space and Defence Systems
Equipment: ?
Configuration: Skynet-2 Bus
Propulsion: Star-24
Power: Solar cells (body mounted), batteries
Mass: 243 kg (219 kg BOL)
Orbit: GEO
Satellite COSPAR Date LS Launch Vehicle Remarks
Skynet 2A 1974-002A 19.01.1974 CC LC-17B P Delta-2313
Skynet 2B 1974-094A 23.11.1974 CC LC-17B Delta-2313


  • Donald H. Martin: Communication Satellites, Aerospace Press, 1991, p 102-104

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