GPS相位平滑伪距差分定位中若干问题的探讨

Research on Some Points in Differential Position with GPS Phase-Smoothed Pseudo-Range

伪距差分定位方法是利用基准站的伪距差对流动站的观测伪距进行改正,得到流动站改正后的伪距观测值后再解算流动站坐标。而利用载波相位历元间的差值对伪距进行平滑,可以减少测量噪声从而提高定位精度,但这都需要在一定的条件下才能得到保证。比如粗差的探测与周跳修复(算法中要利用载波相位观测量)等问题,介绍了自行编制的软件对相关问题的处理方法,并通过试验验证了方法的有效性。

Pseudo-range differential position used the pseudo-range difference computed from base station to corretecd the rover station observation, then we can get the rover station position more precise. It can reduce or eliminate some common error such as troposphere and ionosphere. The carrier phase difference between two epoch also can be used to smooth the pseudo-range, because it can reduce the measure yawp very much, then we get a more precise position once more. But this period brings some points, such as how to detect the cycleslip and gross error. The author programe a software to achieve the position target, and it has been proved by a test done at Wangfenggang of Huainan city in Anhui province.