A Pointing Angle System Error Calibration Method for Spaceborne Laser Altimeter Based on Pointing Angle Residual

Abstract

The invention provides a satellite laser altimeter directional angle system error calibration method based on a directional angle residual error. On the basis of ground detecting a laser spot, the directional angle residual error of a satellite laser altimeter is established according to the position of a located laser spot; based on the directional angle residual error, the relation between a directional angle system error and the directional angle residual error is established; and the directional angle residual error is formed by using the directional angle measured by a satellite system and a laser directional angle calculated by ground spot detection, and the directional angle residual error is used to achieve on-orbit calibration of a satellite laser altimeter directional angle system error. The invention can well calibrate the directional angle system error.

Description

technical field [0001] The present invention relates to the technical field of on-orbit calibration of spaceborne laser altimeters, in particular to a technical scheme for calibrating pointing angle system errors of spaceborne laser altimeters based on pointing angle residuals, which is used for pointing angle systems of spaceborne laser altimeters On-orbit calibration of errors. Background technique [0002] Space-borne laser altimeter is a new type of remote sensing system that uses laser as the measurement load. It has the advantages of high ranging accuracy, wide coverage, outstanding ability to distinguish targets, and less environmental impact. The space-borne laser altimeter records the laser emission pulse emission time and the laser echo pulse reception time through the laser ranging system to obtain the time of flight (Timeof Flight, TOF) of the laser pulse, so as to obtain the laser ranging value, combined with the laser altimeter The position information of the ...

AI Technical Summary

Problems solved by technology

However, for the inspection method of the laser pointing angle accuracy of the ground detection laser spot, the existing literature only introduces the method of detecting the laser spot, and evaluates the accuracy of the laser pointing angle through the center position of the positioned laser spot, and does not give how Pointing angle system error correction model for correcting laser pointing angle system error by correcting laser spot center position through ground detection laser spot positioning

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