一种新的卫星导航系统快速选星方法

 从几何精度因子(GDOP)与星座几何布局的关系出发,提出了用于多星座卫星导航系统的快速选星方法——几何布局选星法.该方法以满足定位要求为前提,按卫星在星座中均布为原则来进行选星.仿真结果表明,相对传统GDOP选星法,计算量减少99%以上,而GDOP满足要求,同时,选星数较少且简洁快速,有效满足了选星求解的实时性和精度要求.

A Fast Satellite Selection Approach for Satellite Navigation System

Based on the analysis of relationship between the geometric dilution of precision (GDOP) and the geometry layout of constellation,a new fast satellite selection method,which is called geometry satellite selection approach (GSSA),is proposed for multi-constellation satellite navigation system.The operation of satellite selection of the proposed method is operated on the premise that the positioning requirement must be met and on the principle of uniform distribution of satellites.Simulation results show that the decrease in computation load of GSSA is more than 99% in contrast with the traditional optimal GDOP method,and the constellation GDOP obtained by GSSA can meet the demand of navigation and positioning.At the same time,the number of selecting satellites also is little,and the satellite selection is simple and rapid.And it is satisfied to the real-time capability and accuracy demand of satellite selection of satellite navigation system.