Inmarsat-3 F4

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Inmarsat-3 F4
Operator Inmarsat
Spacecraft properties
Bus AS-4000
Manufacturer Lockheed-Martin
Launch mass 2,068 kilograms (4,559 lb)
Start of mission
Launch date 4 June 1997 (1997-06-04)
Orbital parameters
Longitude 54° West

Inmarsat-3 F4 is a communications satellite operated by the British satellite operator Inmarsat. It was launched into a geosynchronous orbit on 4 June 1997. It is currently located at 54° West longitude, providing coverage of the Americas.[1]

Inmarsat-3 F4 was constructed by Lockheed-Martin, using an AS-4000 bus. It has a mass of 2,068 kilograms, and is expected to operate for 13 years.[2]

In the United States, Inmarsat ground stations are licensed to operate at 1525-1559 MHz and 1626.5-1660.5 MHz. The 1544-1545 MHz and 1645.5-1646.5 MHz bands are reserved for safety and distress communications.[1]

See also[edit]


  1. ^ a b "Inmarsat List |". US Federal Communications Commission. Retrieved 22 March 2014. 
  2. ^ Krebs, Gunter. "Inmarsat-3 F1, 2, 3, 4, 5". Gunter's Space Page. Retrieved 22 March 2014. 

External links[edit]