Abstract:

For an important application value to highprecise passive location for stationary emitter by single airborne platform in world geodetic system-84 (WGS-84), the filtering algorithms of passive location base on phase difference rate of changing and Doppler frequency rate of changing (PDR/DFR) by single airborne platform in WGS-84 are proposed. Relative positioning formula base on PDR/DFR is derived firstly, and then absolute positioning is realized through coordinate transformation; Employing firstorder Taylor approximation and unscented transformation (UT) respectively, converted measurements and their covariance are derived which are required for filtering multiframe measurements in order to improve the positioning accuracy, and the latter overcomes the former’s weaknesses that the bias compensation cannot be realized for nonlinear transformation and covariance is less consistent. Simulation results indicate that the presion of threedimensional passive location is high, and it is expected to be used in engineering practice.