针对机载无源定位可观测性弱、收敛速度慢、定位精度差等问题,提出了一种利用角度、角度变化率和多普勒变化率对地面目标进行定位的方法。给出了该方法的定位表达式和多次测量EKF滤波后的结果,并将该方法与只测角方法及角度变化率方法进行了比较。计算机仿真表明,该方法可观测性更强、收敛速度更快、定位精度更高。 Aiming at the problems of poor observability, slow convergence speed and poor positioning accuracy of airborne passive location, a method is proposed to locate the ground objects by using the angle, angle change rate and Doppler rate of change. The positioning expression of the method and the result of EKF filtering after multiple measurements are given. The method is compared with the method of only angle measurement and the rate of change of angle. Computer simulation shows that this method can be more observability, faster convergence and higher positioning accuracy.