基于区域定位重要度指标的GPS失效性分析

空间几何构型是决定GPS定位精度的关键因素之一。采用概率统计的思想,基于区域定位重要度指标算法,通过分析计算不同空间几何构型的几何精度系数,寻求对区域定位精度影响最大的卫星构型。在此基础上对GPS卫星进行重要度排序,并对GPS星座失效性进行分析。结果表明:此方法能有效找出对区域定位精度影响最大的卫星构型,并且避免了大规模仿真计算,快捷有效。

GPS Failure Analysis Based on an Important Index in Regional Location

Space geometry is one of the key factors to determine the accuracy of GPS positioning. Based on the idea of probability and statistics,by calculating and analyzing the geometric dilution of precision of different spatial geometry,a sorting algorithm of the importance on regional positioning is used to seek the satellite configuration which has the greatest impact on regional positioning accuracy. On the basis of the sorting algorithm of GPS satellites,the failure analysis of GPS is carried out. The results showed that this method can effectively identify the satellite configuration which has the greatest impact on regional positioning accuracy and avoid a large-scale simulation and calculation,which is efficient and effective.