Information for Arlington Heights AI, IL

Latitude: 42-03-51.5 N, Longitude: 087-59-44 W

Call Sign(s): Communicator

Perm ID Sage ID JSS ID Unit Location Early
RP-31 MM-4 / Z-31   755 Arlington Heights AI, IL FPS-20 / FPS-67; [FPS-6A (2) Army]; FPS-6,-6B/-90 (USAF) FPS-67B; FPS-6; FPS-90 [Army: FPS-69, after USAF left] 1961 30-Sep-69 Squadron relocated from Williams Bay AFS, WI (P-31). Shared Army radar site for the Nike Missile air-defense system (C-80DC); Missile Master site MM-4. Reportedly, the Army replaced the AN/FPS-67B search radar with an AN/FPS-69 ABAR radar, and continued operating this site until 1974.
P-31D / RP-31D Z-31D     Monee, IL FPS-18 *   Mar-62 Jun-68 Gap-Filler Annex. * ADC records list an ''FPS-14'' radar; however, squadron historical reports (1961) list ''FPS-18.'' Building is the FPS-18 style, and is still extant; the radar tower has been removed.
RP-31F Z-31F     Williams Bay, WI         Gap-Filler Annex. Building is still extant. Former LRR site, P-31; GFA facility was located at the SW corner of the original AFS. * The gap-filler radar was not ever installed; however, this gap-filler site is shown on a 1966 map.
RP-31G       Cedar Grove, WI **         ** Gap-Filler Annex. In 1960s ADC plans, but never was built. Also known as Campbellsport, WI.

Current Use: Army Reserve Center.

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