陆基导航三站定位与四站定位Pdop值分析

Analysis of Pdop Value of Position by Three Stations or by Four Stations of Ground Based Navigation

根据陆基导航定位原理,对陆基导航3站定位与4站定位算法进行分析,利用多组数据仿真计算得出3站定位比4站定位Pdop值小,建议在时间延时可以精确测量的情况下采用3站定位解决4站定位应用中布站困难的问题。

According to the principle of the ground based navigation system, the arithmetic of position by three stations and the arithmetic of position by four stations are analyzed. Then the Pdop value of positon by three stations and the Pdop value of position by four stations are simulated by using some data at the same state, and the simulation results show that the Pdop value of position by three stations is less than that of position by four stations. Therefore, the method of position by three stations can be adopted at possible states when the delay can be measured precisely.