US Air Force's 5th Space Surveillance Squadron (closed)

The 5 SPSS (initially designated "Detachment 1, 73rd Space Surveillance Group", or "Det 1 SSURGP") was part of the USAF's Passive Space Surveillance Network which tracked the physical location of emitting satellites in orbit. This data along with that from other systems was used to de-conflict the orbits of various satellites and manned vessels (for instance the Space Shuttle and the International Space Station) to reduce the risk of on-orbit collisions.

However other USAF systems and capabilities ultimately superseded DSTS and it were removed in 2002 and the unit was de-actived shortly thereafter.