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Orbcomm 1's specifications


Prime contractor OSC
Platform Microstar
Mass at launch 40 kg
Mass in orbit  
Diameter 1.04 m stowed
Height 0.165 m stowed
Width 2.2235 m deployed
Stabilization gravity gradient
DC power  
Design lifetime 5-7 years
Telemetry 57.6 kbps in VHF

Deploys a 3.28 m long VHF/UHF communications antenna.

Frequencies


Gateway to satellite: 148 - 149.9 MHz (57.6 kbps)
Satellite to client: 137 - 138 MHz (4.8 kbps)
Client to satellite: 148 - 149.9 MHz (2.4 kbps)
Satellite to gateway: 137 - 138 MHz (57.6 kbps)
Beacons: 400.05 - 400.15 MHz (often 400.100 MHz)
Addressing based on X400 protocol. Signals in symmetric differential PSK (SDPSK)

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