Method and System for Calculating Phase Center Offset Error of Active Remote Sensing Satellite Antenna
An antenna phase center and active remote sensing technology, which is applied in satellite radio beacon positioning systems, radio wave measurement systems, instruments, etc., can solve the problems of unsuitable active remote sensing satellite antenna phase center coordinate system conversion, etc., and achieve good application prospects and The effect of market prospect, high calculation accuracy and strong applicability
Active Publication Date: 2022-07-26
SHANGHAI SATELLITE ENG INST
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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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[0049] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the inventive concept. These all belong to the protection scope of the present invention.
[0050] An embodiment of the present invention provides a method for calculating a phase center offset error of an active remote sensing satellite antenna, including the following steps:
[0051] Step 1, the vector of the satellite GNSS antenna phase center under the WGS84 coordinate system is obtained by GNSS (Global Navigation and Positioning System) observation data processing, and the error includes the measurement error of GNSS;
[0052] Step 2, according to the ground measurement, the connection vector bet...
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The invention provides a method and system for calculating the offset error of the phase center of an active remote sensing satellite antenna. The vector of the phase center of the satellite GNSS antenna under the WGS84 coordinate system is obtained by processing the GNSS observation data, and the error includes the measurement error of the GNSS; the satellite is obtained according to the ground measurement. The connection vector between the phase center of the GNSS antenna and the phase center of the active remote sensing antenna in the body coordinate system, the errors include the installation and deformation errors of the GNSS antenna and the phase center of the active remote sensing antenna; calculate the coordinate transformation matrix from the satellite body coordinate system to the WGS84 coordinate system , the errors include satellite attitude and pointing errors, GNSS measurement errors, and orbital parameter conversion errors; the vector and offset errors of the satellite active remote sensing antenna phase center in the WGS84 coordinate system are calculated. The calculation method is simple, the calculation accuracy is high, the applicability is strong, and it has good application prospects and market prospects. It is a key step in the precise image processing of active remote sensing satellites.
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, in particular to the calculation of the on-orbit phase of an active remote sensing satellite. Background technique [0002] Active remote sensing satellites fly in space formation through the main and auxiliary satellites, the satellites are launched, and the main and auxiliary satellites are received at the same time, forming an effective interference baseline and forming interferometric mapping of the earth. The accuracy of the active remote sensing antenna phase center calculation directly affects the mapping accuracy. [0003] After searching, it is found that the patent document CN 102981174A discloses a method for correcting the relative positioning accuracy caused by the change of the phase center of the GPS antenna. Perform relative positioning; determi...
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IPC IPC(8): G01S19/23
CPCG01S19/23
Inventor 陆晴陈筠力万向成陈重华李楠赵迪
Owner SHANGHAI SATELLITE ENG INST