由相差定位方程直接导出的双基时差定位公式

和现有的三站时差定位方法相比，双基四站时差定位方法具有更高的测量精度，可避免对高重频信号测量的定位解模糊，同时相距较远的两主基站间的时间基准可以要求不同步， 有利于站址的选择。本文利用相似递推的方法，以更简捷的和更严谨的方式直接从程差定位方程导出了双基四站时差测距公式。

Bistatic Time Difference Location Formula Derived Directly By Phase Difference Location Equation

As compared to existing three stations time difference location method in two-dimension plane, the bistatic time difference location method can heighten measurement accuracy and avoid the time difference ambiguity introduced by high PRF signal. At the same time, it also has the characteristic that the time reference between two major base stations can be derangement and that looking for the building position of base station is more convenience. With the help of geometric similarity recurrence method, this paper derives the bistatic time difference ranging formula directly from path difference equation in more forthright and more religious way.