Inmarsat-3 F4

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 was located at 54° West longitude whilst in service, providing coverage of the Americas as Atlantic Ocean Region-West (AOR-W). It was replaced by Inmarsat-3 F5 at 54° West in February 2016, and the now retired Inmarsat-3 F4 was moved to parking at 144° West.[1][2]

Inmarsat-3 F4
Mission typeCommunications
OperatorInmarsat
COSPAR ID1997-027A
SATCAT no.24819
Mission duration13 years (planned)
19 years (achieved)
Spacecraft properties
BusAS-4000
ManufacturerLockheed-Martin Astro Space
Launch mass2,068 kg (4,559 lb)
Start of mission
Launch date3 June 1997, 23:20:06 UTC
RocketAriane 44L (V97)
Launch siteCentre Spatial Guyanais, ELA-2
ContractorArianespace
End of mission
DisposalGraveyard orbit
Deactivated2016
Orbital parameters
Reference systemGeocentric orbit
RegimeGeostationary orbit
Longitude54° West
Transponders
Coverage areaAtlantic Ocean
 

Inmarsat-3 F4 was constructed by Lockheed-Martin, using an AS-4000 satellite bus. It has a mass of 2,068 kg (4,559 lb), and is expected to operate for 13 years.[3]

In the United States, Inmarsat ground stations are licensed to operate at 1525-1559 MHz and 1626.5-1660.5 MHz via a mechanism called the ISAT List. The 1544-1545 MHz and 1645.5-1646.5 MHz bands are reserved for safety and distress communications.[4]

See also

References

  1. "PETITION FOR DECLARATORY RULING". Federal Communications Commission. Retrieved 24 March 2018. Public Domain This article incorporates text from this source, which is in the public domain.
  2. "REQUEST FOR SPECIAL TEMPORARY AUTHORITY". Federal Communications Commission. Retrieved 24 March 2018. Public Domain This article incorporates text from this source, which is in the public domain.
  3. Krebs, Gunter (11 December 2017). "Inmarsat-3 F1, 2, 3, 4, 5". Gunter's Space Page. Retrieved 10 October 2021.
  4. "ISAT List". Federal Communications Commission. Retrieved 24 March 2018. Public Domain This article incorporates text from this source, which is in the public domain.
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