ARSR-4 Long Range 3D Radar Set - A Long Range 3D Radar set built by Westinghouse and integrated into the FAA Air Traffic Control (ATC) system and jointly used by the USAF for Air Defense as a part of the JSS System. Approximate cost was $6.5 million each, total program cost was $800 million with one half paid by USAF. Forty-four systems were purchased and installed. The first set was commissioned on 12 April 1996 at Tamiami, Florida. The last set was accepted at Ajo, Arizona in July 1999. The ARSR-4 radar sites were primarily arranged along the U.S. Conus border to form a perimeter defense. The interior radar sites remained equipped with legacy radars until they were all upgraded by 2015 with Common Air Route Surveillance Radars (CARSR).
The ARSR-4 was designed in the late 1980s to replace then existing FPS-20/60 series vacuum-tube JSS System radar sets. The ARSR-4 is a solid state 3D radar with a limited ability to report aircraft altitudes.
ARSR-4 3D Radar
Note: * Indicates sequentially computed number, may not be correct.