High orbit satellites have high orbital heights and unparalleled characteristics in meteorology,communi-cation,and other fields compared to medium and low orbit satellites.With the development of technology,the applica-tions of high-orbit satellites are also increasing.The autonomous positioning of high-orbit spacecraft by using Multi-GNSS is a research hotspot at home and abroad.Based on STK software,simulation models of four global navigation satellite system constellations,augmentation system and target high-orbit spacecraft are constructed in this paper.The positioning effect of GNSS single system and dual system combination on high orbit spacecraft is evaluated from three aspects:the number of visible stars,DOP value and navigation accuracy.The navigation accuracy and adaptability of GNSS used in high orbit spacecraft are verified and analyzed.The results show that Beidou single system and GLO-NASS and enhanced system are more suitable for high-orbit spacecraft positioning when single system and double sys-tem are used to locate high-orbit spacecraft.
维普
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