摘要
首先从理论上证明了几何精度因子随卫星数目的增加而减小．然后提出了基于现有软件的几何精度因子和定位解的递推算法．该算法从剩余的可见卫星中选取使ＧＤＯＰ５达到最小的第五颗星，利用这颗卫星提供的定位信息对四星定位解进行修正．最后给出了第五颗星的选择方法，算法的目的是以最小的计算量换取定位精度的有效提高．
This paper proves,in theory,that GDOP decreases as the number of satellite increases.Then the recurrence algorithm of GDOP and positioning solution is proposed based on the existing positioning software.This algorithm chooses the fifth satellite which enables GDOP5 to be minimized from the surplus visible satellites and make use of the positioning information provided by this satellite to correct the four satellite positioning solution.Finally,the method for choosing the fifth satellite is given.The purpose of the algorithm is to exchange the least amount calculation for the effective improvement of the positioning precision.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
1998年第3期263-266,共4页
Journal of Beijing University of Aeronautics and Astronautics
基金
中国工程物理研究院科学技术基金
关键词
最小二乘法
算法
全球定位系统
定位解
least squares methods
estimations
algorithms
GPS
positioning solution
