[5] A series of "MSQ sites", each with a mobile AN/MSQ-1A control set in 3 vans had an automatic tracking radar to geolocate the Matador up to ~600 nmi (690 mi; 1,100 km).
Originating in the Caltech/Martin "ZEL Project"[8] and developed as part of weapon system "Project MX 771" at the "Air Force Missile Test Center, Cocoa, Florida"; MARC had accuracy at "crossover into enemy territory" of ~500 ft (150 m)[9] guidance, and at an AN/MSQ-1A range of 165 nautical miles (190 mi; 306 km)–a CEP of 2,700 ft (820 m).
Company included the AN/MPS-19 automatic tracking radar and an alternating current analog[8] OA-626 plotting computer/board vice the DC computer of the preceding AN/MSQ-1 Close Support Control Set with AN/MPS-9 & OA-132 plotting computer/board manufactured for Korean War bombing[8] (cf.
The AN/MPS-19 was a variant of the radar used in the Western Electric M-33 Antiaircraft Fire Control System that achieved a longer MARC range via circuitry for receiving the beacon return from an airborne transponder.
Numerous overseas MARC radar stations downrange of the various Matador launch sites included the Germany tactical air-direction posts ("TDPs") such as the Operating Location (OL) of the 601st Tactical Control Squadron (a training site was at Bann, near Ramstein): The TAC Control Squadron crews were repeatedly exercised by "Quick Reaction Alert" using T-33 Shooting Star aircraft to simulate the planned Matador flight paths, and the T-33 became evident during the exercise when the radar operator observed the aircraft transponder returning "two blips on the same Scan" instead of 1 as with an actual Matador in flight.