| Cavalier Air Force Station | |
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| Part of Air Force Space Command (AFSPC) | |
| Beaulieu Township, Pembina County, northwest of Mountain, North Dakota | |
PARCS antenna array at Cavalier AFS |
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| Type | Air Force Station |
| Controlled by | United States Air Force |
| Garrison | 10th Space Warning Squadron |
Cavalier Air Force Station is a United States Air Force installation in Pembina County, North Dakota, home to the 10th Space Warning Squadron of the 21st Space Wing based at Peterson Air Force Base in Colorado.
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The station monitors and tracks potential missile launches against North America with a AN/FPQ-16 Perimeter Acquisition Radar Characterization System (PARCS), a phased array radar system housed in a 37m-tall structure. Both American and Canadian military members are assigned to the facility, as well as contractor employees.
PARCS observes sub-orbital and orbital objects in support of NORAD's early warning and space surveillance programs. Its single-faced phased array radar is pointed northward over Hudson Bay. PARCS can spot an object the size of a basketball at 3000 km. It analyzes more than 20 000 tracks per day, from giant satellites to space debris.
The station is located approximately 5 km north and 3 km west of Mountain, about 20 km from Cavalier.
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