Statements (24)
Predicate | Object |
---|---|
gptkbp:instanceOf |
military satellite constellation
|
gptkbp:alsoKnownAs |
gptkb:SDS
|
gptkbp:countryOfOrigin |
gptkb:United_States
|
https://www.w3.org/2000/01/rdf-schema#label |
Satellite Data System
|
gptkbp:launchDate |
1976
|
gptkbp:manufacturer |
gptkb:TRW
gptkb:Northrop_Grumman |
gptkbp:numberOfSpecies |
three
|
gptkbp:operatedBy |
gptkb:United_States_Air_Force
|
gptkbp:orbitType |
geosynchronous orbit
highly elliptical orbit |
gptkbp:purpose |
military communications
relay of reconnaissance satellite data |
gptkbp:relatedTo |
gptkb:Defense_Satellite_Communications_System
gptkb:Milstar gptkb:Quasar_(satellite) |
gptkbp:SDS-1FirstLaunch |
1976
|
gptkbp:SDS-2FirstLaunch |
1989
|
gptkbp:SDS-3FirstLaunch |
1998
|
gptkbp:status |
operational
|
gptkbp:usedBy |
gptkb:National_Reconnaissance_Office
gptkb:United_States_Department_of_Defense |
gptkbp:bfsParent |
gptkb:Quasar_satellites
|
gptkbp:bfsLayer |
6
|