研究了发射机固定、接收机置于空中运动平台上的双基地雷达对目标距离的测定。收发讯机的地理位置假定由自身位置传感器（如ＧＰＳ接收机）给出。目标的方向由接收天线的指向特性提供。在此基础上解算目标与接收机的真实斜距。基于国际大地测量学会规定的大地椭球参数，导出了目标真实斜距与双基地时延差的关系式，并用单片机实现了此距离的实时计算 The bistatic radar with the transmitter fixed and the receiver placed on the airborne platform is used to measure the target distance. The geographic location of the transceiver is assumed to be given by its own position sensor, such as a GPS receiver. The direction of the target is provided by the directional characteristics of the receiving antenna. Based on this, the actual slant distance between the target and the receiver is solved. Based on the earth ellipsoid parameters defined by the International Association of Geodesy, the relationship between the target real slant range and the bistatic time delay difference is derived and the real-time calculation of this distance is realized by a single chip microcomputer