United States general surveillance radar stations include Army and USAF stations of various US air defense networks :Joint Surveillance System (JSS), with radar stations controlled by joint FAA/USAF ROCCs beginning in 1980 SAGE radar stations, for the Semi-Automatic Ground Environment network prior to the JSS Alaska Ring radar net, the radar stations of Alaskan Air Command Permanent System radar stations, the Air Defense Command manual network of radar stations prior to deployment of SAGE Pinetree Line, a series of radar stations located across southern Canada at about the 50th parallel north. Lashup Radar Network radar stations, the radar stations deployed 1950-2 when the "Radar Fence" Plan was not approved Temporary radar net, the "five-station radar net" established in 1948 Army Radar Stations, World War II installations of the Aircraft Warning Service with radars