2. USSF / SD 4 / Cavalier air station

Cavalier Airstation, North Dakota was the former Perimeter Aquisition Radar in the US army Mickelsen SAFEGUARD complex. Its function was to scan northward for incoming ICBM warheads passing over the northpole. At complex deactivation the radar was taken over by USAF.

Currently based:
- USSF / Space Delta 4 / #10 Space Warning Squadron (10 SWS) at Cavalier AFS, North Dakota, provides strategic missile warning and space domain awareness by operating and maintaining the Perimeter Acquisition Radar Attack Characterization System (PARCS) http://www.spaceforce.mil/Multimedia/Photos/igphoto/2002222264/

Space Delta 4 (DEL 4) operates and supports 3 constellations of Overhead Persistent Infrared (OPIR) satellites and 2 types of Ground-Based Radars (GBRs) for the purpose of conducting strategic and theater missile warning.

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