Land resource satellite calibration orbit planning and reference load orbit optimization method

Abstract

The invention relates to a land resource satellite calibration orbit planning and reference load orbit optimization method, and belongs to the field of in-orbit absolute radiation calibration. The method comprises the following steps: step 1, measuring space position vectors of a radiation reference satellite and a satellite to be calibrated under a space rectangular coordinate system OXYZ; 2, calculating longitude and latitude R 'REF of the radiation reference satellite in a geodetic coordinate system BLH and longitude and latitude R' RS of the satellite to be calibrated in the geodetic coordinate system BLH; 3, calculating an observation angle alpha of the satellite to the ground calibration site D; screening longitude and latitude of the radiation reference satellite and the to-be-calibrated satellite which meet calibration conditions; 4, further screening the longitude and latitude of the radiation reference satellite and the longitude and latitude of the to-be-calibrated satellitewhich meet calibration conditions; 5, presetting the number of times that the radiation reference satellite and the to-be-calibrated satellite pass through the same ground calibration site D; adjusting orbit parameters of the radiation reference satellite and the to-be-calibrated satellite; according to the method, the orbit of the radiation reference satellite is optimally designed through the least square method.

Description

technical field [0001] The invention belongs to the field of on-orbit absolute radiation calibration, and relates to a land resource satellite calibration orbit planning and reference load orbit optimization method. Background technique [0002] The radiometric accuracy of remote sensing data has become more important under the increasing demand for remote sensing quantitative applications, and the requirement to further improve the radiometric calibration accuracy has been widely recognized. Orbit planning is the premise of on-orbit cross-radiation calibration, and the demand for increasing the frequency of cross-calibration of loads to be calibrated and reference loads with the goal of improving the accuracy of radiation calibration is also obvious. [0003] The narrow width and long revisit period of land observation satellites restrict the observation opportunities of cross-calibration of the benchmark load and the load to be calibrated. The joint observation data compar...

AI Technical Summary

Problems solved by technology

However, at present, there is no method for land resource satellite calibration orbit planning and base load orbit optimization.

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