Correction method and system of environmental load of GPS (global positioning system) coordinate time series

Abstract

The invention discloses a correction method and system of environmental load of a GPS (global positioning system) coordinate time series. The method includes the steps of 1, acquiring observation data of IGS (international GPS service) reference stations, and processing the observation data by an optimal data processing model to obtain a reference line one-day solution of each IGS reference station; 2, according to the theory of elastic deformation of earth, acquiring an environmental load displacement time series of each IGS reference station under a CM (center of mass) frame; 3, correcting reference station coordinates of the reference line one-day solutions through the environmental load displacement time series of the IGS reference stations; 4, subjecting the corrected reference line one-day solutions to combined adjustment by Kalman filtering to obtain velocity and coordinate time series of the IGS reference stations. The correction method and system has the advantages that actually running GPS coordinate time series of the reference stations can be better indicated, and more reliable reference station positions and velocities can be obtained.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation positioning and application, and in particular relates to a GPS coordinate time series environmental load correction method and system. Background technique [0002] The time series of GPS coordinates can not only reflect the linear changes of the reference station, but also reflect the nonlinear changes of the reference station. Many research results have confirmed the strong correlation between the surface displacement caused by environmental load and the nonlinear change of GPS reference station (van Dam and Herring, 1994; van Dam et al., 1994; van Dam et al., 1997; Zerbini et al. ., 2001; van Dam et al., 2001; Scherneck et al., 2003; Schuh et al., 2004; Petrov and Boy, 2004; Tregoning et al., 2009; van Dam et al., 2010; Tesmer et al ., 2011; Lavall'ee et al., 2010; Jiang et al., 2013). Studying the environmental load correction of GPS coordinate time series can not only obtain t...

AI Technical Summary

Problems solved by technology

Freymueller (2009) found that ignoring the periodic changes of the frame points during the datum transformation will lead to the distortion of the transformation parameters and penetrate into the coordinate time series of all datum stations to cause wrong motion trends

Therefore, the GPS coordinate time series used to implement environmental load correction under the CF framework may not represent the real motion of the reference station, and the resulting environmental load correction effect may also be inaccurate

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