Low-orbit navigation enhanced real-time positioning method considering satellite orbit error

• Main Authors: SUN YIXIONG, XIE SONG, WANG GANG, YU BAOGUO, YANG XUAN, HAN SHUANGLIN, LIU TIANLI, YI QINGWU, WU CAILUN, LIU XIAOXU
• Format: Patent
• Language: Chinese; English
• Published: 23.11.2021
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention discloses a low-orbit navigation enhanced real-time positioning method considering a satellite orbit error, and belongs to the field of low-orbit satellite navigation enhanced positioning. According to the method, a two-step method is adopted to weaken the influence of orbit errors, a ground receiver is used for receiving observation data and navigation messages, and respective orbits and clock errors of a navigation satellite and a low-orbit satellite are calculated; positioning is carried out according to a conventional mode, orbit error parameters are estimated after positioning convergence, and orbit errors of the low-orbit satellite and the navigation satellite are absorbed by giving a proper weight so that the effect of improving the positioning precision is achieved. According to the method, the characteristic that the convergence speed of the low-orbit navigation enhanced PPP is high is utilized, the carrier phase ambiguity is quickly converged, and then orbit error parameters are introd