The design and analysis of PD radar aid by GPS/INS ultra-tightly coupled navigation

GPS/INS ultra-tightly coupled navigation system has been widely used for the tracking and positioning of high dynamic aircraft. It has the advantages of high positioning accuracy and low power consumption in high dynamic environment. The algorithm of the airborne PD radar´s DPCA (Displaced Phase Center Antenna) technique needs a high accuracy measurement of the aircraft´s speed. Hence, applying the GPS/INS ultra-tightly coupled navigation to the measurement of the radar carrier´s speed will clearly improve the property of the airborne PD radar. In the paper, a airborne PD radar assisted by GPS/INS ultra-tightly coupled navigation is designed and analyzed and gain the conclusion that the performance of the coupled system is better than the radar with the traditional aircraft velocity measurement method.