doi:10.16186/j.cnki.1673-9787.2020.1.6

Received:2019/04/28

Revised:2019/06/19

Published:2020/01/15

Research on satellite selection algorithm of satellite navigation based onirregular triangular network

LI Kezhao1,2, WANG Ning1, WEI Jinben3, SHI Junpeng1

1.School of Surveying and Landing Information Engineering， Henan Polytechnic University ，Jiaozuo  454000 ， Henan， China;2.Collaborative Innovation Center of BDS Research Application， Zhengzhou  450052 ， Henan， China;3.Zhengzhou Xinda Institute of Advanced Technology， Zhengzhou  450052 ， Henan， China

Abstract:The rational and rapid selection of visible satelltes involved in navigation calculation is one of the key problems to be solved in current BDS/GNSS satellite navigation and positioning. Thus a satellite selection algorithm based on irregular triangular network projection was proposed. The main idea of the algorithm is as follows ： the Delaunay triangulated irregular network is projected by the sphere inscribed polyhedron method； and then the volume of the sphere inscribed polyhedron is calculated quickly. The relationship between the volume of polyhedron and geometric dilation of precision （ GDOP） is obtained， which is used as the basis for judging the selection of satellites navigation. The experimental calculations showed that when the number of visible satellites participating in the caculation was less than 11 ， the GDOP value decreased obviously with the increase of the polyhedral volume； when the number of visible satellites reached 11 ， the GDOP value did not change significantly with the increase of the polyhedral volume， but theaging time for the calulation was significantly reduced. According to this， 11 satellites with better spatial geometric distribution among the many visible satellites were selected as the sollution satellites， and the navigation and positioning accuracy was higher， moreover， the calulation aging was taken into consideration in this method.

Key words:global navigation satellite system;satellite navigation;geometric dilution of precision;irregular triangular network;satellite selectionalgorithm

基于一种不规则三角网的卫星导航选星算法研究_李克昭.pdf