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P-20 radar
The P-20 "Periskop" ((ロシア語:"Перископ"); (英語:Periscope)) also referred to by the NATO reporting name "Bar Lock" in the west is a 2D E band/F band radar developed and operated by the former Soviet Union.
== Development ==
The P-20 development was started in 1946 when State Federal Order of the Red Banner Research Institute Number 20 (now called All-Union Scientific Research Institute of Radio Engineering or VNIIRT〔 〕) was given the task of developing stationary and mobile early warning ground control and interception radar for the Soviet Air Force. The stationary radar would go on to become the P-50 but the mobile radar was to become the P-20. A design would go on to spawn a number of successors including the P-30, P-35 and P-37 radar.〔
The P-20 would become the first Russian radar to use the decimetric wavelength, the first prototype being created in 1947, a factory test unit 1949.〔 By 1949 the radar had completed state trials and was accepted into wide service within the Soviet airforce, the designers of the P-20 would go on to be awarded the State Prize of the USSR in 1950 in recognition of the achievement.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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