Inmarsat-3 F4
| Mission type | Communications |
|---|---|
| Operator | Inmarsat |
| COSPAR ID | 1997-027A |
| SATCATno. | 24819 |
| Mission duration | 13 years (planned) 19 years (achieved) |
| Spacecraft properties | |
| Bus | AS-4000 |
| Manufacturer | Lockheed-Martin Astro Space |
| Launch mass | 2,068 kg (4,559 lb) |
| Start of mission | |
| Launch date | 3 June 1997, 23:20:06UTC |
| Rocket | Ariane 44L(V97) |
| Launch site | Centre Spatial Guyanais,ELA-2 |
| Contractor | Arianespace |
| End of mission | |
| Disposal | Graveyard orbit |
| Deactivated | 2016 |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Geostationary orbit |
| Longitude | 54° West |
| Transponders | |
| Coverage area | Atlantic Ocean |
Inmarsat-3 F4is a communications satellite operated by the British satellite operatorInmarsat.It was launched into ageosynchronous orbiton 4 June 1997 from theGuiana Space Centrein Kourou, French Guiana. 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]
The Inmarsat 3 series spacecraft (F1 thru F5) were built byLockheed-MartinAstro Space as the prime contractor.Lockheed-Martinwas responsible for the basic spacecraft bus, and the EuropeanMatra Marconi Space,developed the advanced communications payload.
The Inmarsat 3 communications payload can generate a global beam and a maximum of seven spotbeams. The spotbeams are directed as required to make extra communications capacity available in areas where demand from users is high.
The spacecraft was built using anAS-4000satellite 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 1525-1559MHzand 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
[edit]
References
[edit]- ^"PETITION FOR DECLARATORY RULING".Federal Communications Commission.Retrieved24 March2018.
This article incorporates text from this source, which is in thepublic domain.
- ^"REQUEST FOR SPECIAL TEMPORARY AUTHORITY".Federal Communications Commission.Retrieved24 March2018.This article incorporates text from this source, which is in thepublic domain.
- ^Krebs, Gunter (11 December 2017)."Inmarsat-3 F1, 2, 3, 4, 5".Gunter's Space Page.Retrieved10 October2021.
- ^"ISAT List".Federal Communications Commission.Retrieved24 March2018.This article incorporates text from this source, which is in thepublic domain.