Ground Equipment Facility J-31 (San Pedro Hill Air Force Station during the Cold War) is a Joint Surveillance System radar site of the Western Air Defense Sector (WADS) and the Federal Aviation Administration’s air traffic control radar network [1] for the Los Angeles Air Route Traffic Control Center. The facility’s Air Route Surveillance Radar Model 1E with an ATCBI-6 beacon interrogator system are operated by the FAA and provide sector data to North American Aerospace Defense Command.
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