BDS/GPS high-accuracy positioning method

Abstract

The invention discloses a BDS / GPS high-accuracy positioning method, relating to the field of satellite navigation. The method includes establishing a virtual reference station, acquiring the common-view satellite ephemeris and the satellite observation data received by a reference station Bi and a roving station M, and acquiring the geometry distance between the satellite and the reference station Bi; acquiring the pseudo range correction number of the reference station Bi; interpolating the pseudo range correction number of the virtual reference station by means of an algorithm of inverse distance to a power; interpolating the pseudo range correction number of the roving station by the roving station by means of an algorithm of inverse distance to a power; correcting the satellite pseudo range observation data received by the roving station by means of the pseudo range correction number of the roving station; and establishing a roving station satellite pseudo range observation equation to obtain the accurate coordinate of the roving station to complete the positioning. According to the invention, the safety hidden troubles of information leakage of the reference station because a multi-reference difference positioning method in the prior art must use the accurate coordinate of the reference station can prevented, and high-accuracy positioning is obtained.

Description

technical field [0001] The invention relates to the field of satellite navigation, in particular to a local enhanced pseudorange differential positioning method in a global navigation satellite system, especially a BDS / GPS high-precision positioning method. Background technique [0002] Navigation is the process of guiding vehicles or other moving objects from one location to another by using some method or means. Currently commonly used navigation methods mainly include inertial navigation, radio navigation and satellite navigation. Satellite navigation is to receive navigation and positioning signals sent by navigation satellites, and use navigation satellites as dynamic known points to provide global, all-weather, high-precision position, speed and time information for moving carriers in real time, and then complete various navigation tasks. The satellite navigation and positioning system has developed from the original Doppler satellite navigation system to the global n...

AI Technical Summary

Problems solved by technology

The differential positioning method makes full use of the positional relationship between the rover and the reference station, and better eliminates the effects of satellite clock error, satellite ephemeris error, and atmospheric error. However, in the existing differential positioning methods, the differential positioning method based on a single The spatial range of positioning is limited, and the positioning accuracy decreases with the increase of the distance. The differential positioning method based on multiple reference stations needs to use the precise coordinates of the reference stations for interpolation, so there is a security risk of information leakage from the reference stations.

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