JY-21 full solid-state ATC primary surveillance radar ( PSR ) is a new generation of airport surveillance radar ( ASR ), which has been developed according to the requirement of CAAC's air traffic control ( ATC ). JY-21全固态航管一次监视雷达是按中国民航空中交通管制(ATC)需求研制的新一代机场监视雷达(ASR)(ASR)。