Method and system for calculating phase center offset errors of active remote sensing satellite antenna

Abstract

The invention provides an active remote sensing satellite antenna phase center offset error calculation method and system, and the method comprises the steps: obtaining a vector of a satellite GNSS antenna phase center under a WGS84 coordinate system through GNSS observation data processing, and enabling an error to comprise a GNSS measurement error; obtaining a connection line vector between theGNSS antenna phase center and the active remote sensing antenna phase center under a satellite body coordinate system according to ground measurement, wherein errors comprise installation and deformation errors of the GNSS antenna and the active remote sensing antenna phase center; calculating a coordinate transformation matrix from a satellite body coordinate system to a WGS84 coordinate system,wherein the errors comprise a satellite attitude pointing error, a GNSS measurement error and an orbit parameter transformation error; and calculating to obtain a vector and an offset error of the phase center of the satellite active remote sensing antenna under a WGS84 coordinate system. The calculation method is simple, high in calculation precision and strong in applicability, has good application prospect and market prospect, and is a key step of active remote sensing satellite precision image processing.

Description

technical field [0001] The invention relates to the field of overall satellite design, in particular to a method and system for calculating the phase center offset error of an active remote sensing satellite antenna, especially to the calculation of the active remote sensing satellite's on-orbit phase. Background technique [0002] Active remote sensing satellites fly in orbital space formation through the main and auxiliary satellites, the satellites are launched, and the main and auxiliary satellites receive at the same time, forming an effective interference baseline and interferometric mapping of the earth. The accuracy of active remote sensing antenna phase center calculation directly affects the accuracy of surveying and mapping. [0003] After searching, it is found that the patent document CN 102981174A discloses a method for correcting the relative positioning accuracy due to the change of the phase center of the GPS antenna, which includes the following steps: the ...

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Problems solved by technology

But it is not suitable for active remote sensing satellite antenna phase center coordinate system conversion and phase center offset error calculation

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