伪卫星改善DOP值的数学分析  

The analysis of reducing DOP with pseudolites in theory

作　　者：孟键[1] 孙付平[1] 毛悦[1] 

机构地区：[1]解放军信息工程大学测绘学院,郑州450052

出　　处：《测绘科学》2008年第3期52-53,34,共3页Science of Surveying and Mapping

摘　　要：在卫星导航系统中,DOP值是衡量卫星定位导航精度好坏的重要量度。在区域导航定位中,增设伪卫星可以很好地改善卫星分布的几何结构,降低DOP值,提高定位导航的精度。本文用矩阵分解的方法验证了在增设伪卫星后,GDOP必定会减小的结论,并且分析了仰角与VDOP之间的关系,利用伪卫星低仰角的特点例证了加入伪卫星后对系统DOP值的改善作用。In satellite navigation system, DOP value is important measurement for judging accuracy. In area navigation, setting up pseudolites can improve the geometry, structure of satellite distribution, reduces DOP value, enhance the accuracy. In this paper, the conclusion that with the method of decompose matrix the GDOP can be reduced ＇after setting up pseudolites is verified. The relationshi Pbetween elevation and VDOP is analyzed, and the improvement of DOP after adding pseudolites with low elevation of pseudolite is exemplified.

关 键 词：卫星导航 伪卫星 DOP 矩阵分解 

分 类 号：P228[天文地球—大地测量学与测量工程]