The Westinghouse AN/GPA-35 Ground Environment (GPA-35 colloq.) was a surface-to-air missile weapons direction system for Cold War launch and steering during CIM-10 Bomarc tests. The command guidance system manufactured by Westinghouse Electric Corporation used Bendix AN/FPS-20 Radar data to track the missile, and Lincoln Laboratory Division 6 had an "AN/GPA-35 Study Group" for integrating the AN/GPA-35 into the SAGE System. Notable launches with GPA-35 guidance included  (e.g., at the Eastern Range):
- 1956 October—Six launches were used to test the AN/GPA-35 capability to command BOMARC intercept of QB-17 drones.
- 1957 October—A BOMARC test with "live high-explosive warhead" failed when the GPA-35 commanded "faulty mid-course guidance".
- 1958 May 1 -- The "GPA-35 could not control the missile beyond 130 miles."
- 1958 August 7 -- A GPA-35 took control of an airborne BOMARC from the Experimental SAGE Sector, and the missile malfunctioned and crashed into the Atlantic Ocean.
- 1959 March 6 -- A straying BOMARC was self-destructed near the western boundary of the "Eglin Gulf Test Range" after a GPA-35 had transmitted the wrong commands.
- 1959 April 13—The GPA-35 lost control of the missile 100 seconds after launch.
- 1959 April 24—GPA-35 control was used for simultaneous guidance of 2 BOMARCS.
References[edit | edit source]
- Rice, Helen (Scribd image). History of Ogden Air Material Area… 1934 - 1960 (Report). p. 204. https://www.scribd.com/doc/106042198/Hill-Air-Force-Base. Retrieved 2013-07-22. "On 17 May 1957 the Boeing Airplane Co., the prime contractor, received its initial contract for a plus [sic] $135 million to produce IM-99 Bomarcs. …Boeing subcontracted to…Westinghouse Electric for the AN/GPA-35, ground-to-air guidance system used on the Bomarc until SAGE was fully operational"
- McMullen, R. F. (15 Feb 1980). History of Air Defense Weapons 1946–1962 (Report). ADC Historical Study No. 14. Historical Division, Office of information, HQ ADC.
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