A Location Method for Three-Star Time-Difference System

摘要

Aiming at three stars used to locate the ground radiant point, the precise location model using digital map and WGS-84 coordinate is put forward.The iterative location algorithm for ground target is described. The location result simulation is made using simulated three-dimensional relief map. And the theoretical error expression for the location method is deduced. The study shows that the location result simulation is consistent with the error theoretical analysis, and the location error caused by height hypothesis can effectively decreased.