可拓评判方法在卫星定位中的应用

Application of extent-tech in evaluating of satellite positioning

针对不同卫星高度角和几何分布对伪距单点定位精度的影响,提出了运用可拓评判理论来确定不同卫星伪距观测值的权,并通过自行编制的伪距加权单点定位软件,结合实际算例进行相应的计算,计算结果从准确性和稳定性两个方面与传统的等权计算法进行了比较,证明了这种加权定位法精度更高,稳定性更好。

An algorithm of determining the weight of satellite of pseudo range observations is introduced in this paper, which is based on the extension of the application of evaluation theory. It aims at checking the impact of the different elevation angle and the geometric distribution of the satellite. The authors of this paper present a single-point positioning software and a calculation combined with a practical example. The results are corresponded to the two aspects of accuracy and stability calculated by the traditional method, which indicate that this method is more accurate and stable.