本文提出双曲线卫星无源定位系统。系基于两个或三个卫星对无线电辐射波进行“到达时间差”的测量,并参照卫星的空间坐标,作双曲线定位。文中给出地面坐标系的定位方程并作了定位误差分析。分析表明,在现有技术条件下,定位精度比测向定位提高一个数量级以上,并可以简化星载天线接收设备,较容易地实现较低频段的无源定位。 This paper presents hyperbolic satellite passive location system. Based on two or three satellites for radio radiation wave “time difference of arrival” measurement, and with reference to the space coordinates of the satellite for hyperbolic positioning. The location equation of the ground coordinate system is given and the positioning error analysis is given. The analysis shows that under the current technical conditions, the positioning accuracy is more than an order of magnitude higher than that of the DF, and the satellite-based antenna receiving device can be simplified, and the passive positioning in the lower frequency band can be realized more easily.