EntityQ5034176· pop 5· linked from 103 articlesCanyonSign in to saveUnited States spy satellite seriesConnectionssignals intelligenceEntityreconnaissance satelliteEntityOrionEntityAquacadeEntityUnited StatesCountryphotographyEntityCentral Intelligence AgencyEntityWest GermanyEntityWayback MachineEntityespionageEntityYom Kippur WarEntityUnited States Air ForceEntityEdward Mills PurcellEntitygeostationary orbitEntitylow Earth orbitEntityBad AiblingEntityDijkstra's algorithmEntityCape Canaveral Space Force StationEntitygeosynchronous orbitEntityInternational DesignatorEntityCategories1971 in spaceflight1972 in spaceflightMilitary equipment introduced in the 1960sNational Reconnaissance Office satellitesReconnaissance satellites of the United StatesSatellites of the United States Air ForceSignals intelligenceSignals intelligence satellites