可拓评判方法在卫星定位中的应用  

Application of extent-tech in evaluating of satellite positioning

作　　者：段兵兵[1] 兰孝奇[1] 李森[1] 

机构地区：[1]河海大学土木学院,南京210098

出　　处：《工程勘察》2010年第1期63-65,69,共4页Geotechnical Investigation & Surveying

基　　金：现代工程测量国家测绘局重点实验室开放基金资助项目(ES-SBSM-(06)-01)

摘　　要：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.

关 键 词：GPS 加权几何精度因子 可拓评判法 定位误差 

分 类 号：P228.4[天文地球—大地测量学与测量工程]