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From Wikipedia, the free encyclopedia

Galaxy 4R
Mission typeCommunications
OperatorPanAmSat (2000–2006)
Intelsat (2006–2009)
COSPAR ID2000-020A
SATCAT no.26298
Mission duration15 years
Spacecraft properties
BusHS-601HP
ManufacturerHughes
Launch mass3,716 kilograms (8,192 lb)
BOL mass2,511 kilograms (5,536 lb)
Dry mass1,895 kilograms (4,178 lb)
Power7,800 watts
Start of mission
Launch date19 April 2000, 00:29 (2000-04-19UTC00:29Z) UTC
RocketAriane 42L
Launch siteKourou ELA-2
ContractorArianespace
End of mission
DisposalDecommissioned
DeactivatedApril 2009 (2009-05)
Orbital parameters
Reference systemGeocentric
RegimeGeostationary
Longitude73° west (2000)
99° west (2000–2006)
76.85° west (2006–2009)
Transponders
Band28 C-band
28 Ku-band
4 of each reserved as backups
Coverage areaNorth America
 

Galaxy 4R was a communications satellite operated by PanAmSat from 2000 to 2006, and by Intelsat from 2006 to 2009. It spent most of its operational life at an orbital location of 99° W, a slot once occupied by the Galaxy IV, which suffered a failure in 1998. G4R was launched on April 18, 2000, with an Ariane launch vehicle, and covered North America with twenty-four transponders each on the C- and Ku bands. The satellite is currently at 76.8°W, inclined.

Users included Warner Brothers, National Public Radio, Public Radio International, Buena Vista Television Distribution, FOX, and Televisa. The satellite was also utilized for satellite internet services through DirecPC.

Much of the Ku side was occupied by the HITS service, which re-distributes programming found on other satellites to cable providers.

Designed for an operational lifespan of 15 years, Galaxy 4R suffered a propulsion system failure in 2003 and was replaced by Galaxy 16 on August 14, 2006. It was moved to 76.85 degrees west after being replaced and its orbit was allowed to become more inclined in order to save station-keeping propellant. The satellite was decommissioned in April 2009 and moved to a graveyard orbit.

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This page was last edited on 7 January 2020, at 17:44
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