As in the high-orbit space which exceeds the normal service area of the BeiDou navigation satellite system,the navigation signal is weak and the visibility is poor,and it is diffi-cult to achieve stable and reliable navigation and positioning services for high-orbit aircraft.A method for improving the navigation performance of high-orbit vehicles is proposed by using space satellites as a space-time reference transmission platform to transmit navigation signals to high-or-bit space areas,and the selection of BeiDou navigation performance enhancement constellation for high-orbit space is carried out.Based on the evaluation indicators of satellite visibility,dilution of precision(DOP),signal reception threshold and number of required enhanced satellites,the en-hanced performance of BeiDou navigation based on LEO constellation,MEO constellation and HEO constellation is simulated and analyzed.
关键词
星座设计/卫星可见性/高轨卫星导航/精度衰减因子值
Key words
Constellation design/Satellite visibility/High-orbit satellite navigation/Dilution of precision
维普
万方数据