摘要
卫星轨道对于长距离、大范围的GPS定位来说 ,也是一项比较大的误差源。本文为了便于分析卫星轨道误差对网络RTK距离观测值的影响 ,首先定义了一种测站坐标系 ,然后在此坐标系中推导了卫星轨道误差对距离观测值的精确影响公式 ,并分析了轨道误差对单差距离观测值的影响与各变量之间的关系 。
For long distance GPS positioning,orbit bias is an important bias source of positioning.Firstly,in order to facilitate analyses of orbit bias,a local coordination system is defined in this paper.Secondly,the accurate formulae of the influence of orbit bias on range observations are derived here,and charts illuminate the relations between the single-difference orbit bias and some variables.At last,the elimination of orbit bias influence is showed by the calculation of actual data with network RTK.
出处
《测绘科学》
CAS
CSCD
北大核心
2005年第2期41-43,共3页
Science of Surveying and Mapping
基金
地理空间信息工程国家测绘局重点实验室资助项目
