Correction method for absolute antenna phase center of outdoor GNSS (Global Navigation Satellite System) receiver based on precision mechanical arm

Abstract

The invention belongs to the fields of antenna measuring technique and satellite navigation and positioning, and relates to a correction method for the absolute antenna phase center of an outdoor GNSS (Global Navigation Satellite System) receiver based on a precision mechanical arm. In view of the problem that conventional outdoor GNSS observation cannot obtain a high-precision correction model for the absolute antenna phase center of a receiver, a majority of common errors are eliminated through ultra-short baseline observation, the absolute phase center offset (PCO) of a receiver antenna and the separation of phase center variation (PCV) are realized through rapid rotation and inclination of the high-precision mechanical arm, finally the PCO is resolved through a least squares algorithm, and fitting calculation of the PCV is carried out for observation residual. According to the correction method, outdoor operation can be carried out, the correction precision of 1mm for the PCO and PCV can be reached, the correction method is suitable for accurate calibration of the PCO and PCV of the receiver capable of tracking the signals of satellite navigation systems such as a GPS (Global Positioning System), a BDS (Beidou Navigation System), a GLONASS (Global Navigation Satellite System) and Galileo, and thus the systematic measuring error caused by imprecision of the PCO and PCV of the receiver can be eliminated, and the user positioning precision is further improved.

Description

technical field [0001] The invention belongs to the field of antenna measurement technology and satellite navigation and positioning, and in particular relates to a method for correcting the absolute antenna phase center of an outdoor GNSS receiver based on a precision mechanical arm. Background technique [0002] In the field of Global Navigation Satellite System (GNSS) navigation and positioning, the accuracy of carrier phase observations is much higher than that of pseudorange observations, so carrier phase observations play a large role in high-precision GNSS navigation and positioning data processing . The phase observation value is obtained by measuring the respective instantaneous phase centers of the transmitting time of the satellite transmitting antenna relative to the receiving time of the receiver. Its instantaneous phase center changes with the altitude angle, azimuth angle, and satellite signal strength and is related to frequency. In actual data processing,...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art. The technical problem to be solved by the present invention is: for the problem that the conventional outdoor GNSS observation cannot obtain a high-precision receiver absolute antenna phase center correction model, the large Part of the public error, with the help of the rapid rotation and tilt of the high-precision mechanical arm, the absolute phase center compensation of the receiver antenna ( PCO ) and phase center change ( PCV ), and finally solved by the least squares algorithm PCO and fit the observed residuals to PCV

Images