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无源定位技术有着广阔的应用前景。在现有单站无源定位方法的基础上介绍了相位变化率定位法。该方法利用观测平台上两个相互正交的相位干涉仪接收目标辐射电磁波的相位获取目标的方向信息，利用对应的相位变化率获取目标的径向距离信息，从而实现对目标的实时高精度定位。提出了在空中观测平台发生飞行姿态变化情况下的定位求解思路，即利用姿态变化条件下的测量数据直接求出目标在姿态变化前的原始载机坐标系中的位置。文中给出了这一思路下相应的定位表达式并引入修正增益扩展卡尔曼(MGEKF)算法对原始定位结果进行滤波处理。仿真结果表明，该方法是一种发展前途较好的单站无源定位方法。rn“,”Technology of passive location has broad prospects in applications. In this paper, the method using the phase rate of change for the single observer-passive location is introduced based on existing methods. One can obtain the direction of the target with phase information of two orthogonal interferometers on the observer and the radial distance with the corresponding phase rate of change. Then the target can be located with high speed and precision. A locating approach is given when the flying posture of the observer is changed--the target can be located directly in the original coordinate system according to the measurement data. The related locating expressions are given. MGEKF filtering algorithm is adopted to process original locating outcomes. Simulations show that this method is effective.