Area array high dynamic range noctilucent imaging satellite in-orbit relative radiation calibration method

Abstract

The invention discloses an area array high dynamic range noctilucent imaging satellite in-orbit relative radiation calibration method, which comprises the following steps: in-orbit dark current calibration and correction: obtaining dark current parameters of a noctilucent sensor under different imaging parameters; calibrating and correcting the low-gain image of the noctilucent sensor in the daytime to obtain a relative calibration coefficient of the image of the noctilucent sensor under the low-gain imaging parameters in the daytime; and constructing a daytime-night radiation reference transfer model, so that correction of a high-gain image at night by a relative calibration coefficient under daytime low-gain imaging is realized. The method is suitable for in-orbit relative radiation calibration of the area array noctilucent satellite, and has the advantages of being high in precision, more convenient to use and low in cost.

Description

technical field [0001] The invention relates to the technical field of luminous remote sensing observation, and provides an on-orbit relative radiation calibration method for an area array high dynamic range luminous imaging satellite, especially for the problem that the luminous satellite load is difficult to directly obtain the luminous calibration reference and has high dynamic range imaging capabilities. Luminous payload, inventing an on-orbit relative radiation calibration method for area array high dynamic range luminous imaging satellites that does not rely on the luminous ground reference. Background technique [0002] The field of global earth observation has entered a new era characterized by high-precision, all-weather information acquisition and automatic and rapid processing. Global remote sensing technology has achieved unprecedented rapid development. The information assurance capability has been significantly improved. Space observation technology has the ch...

AI Technical Summary

Problems solved by technology

Compared with traditional daytime imaging optical remote sensing satellites, the on-orbit calibration of area array luminous remote sensing satellite sensors faces the problem of no luminous calibration benchmark. For example, the area array luminous sensor of Luojia-1 01 star has a single scene size of 264km×264km. It is difficult to obtain such a large-area luminous uniform calibration benchmark, and the existing method of directly using luminous images for statistical calibration is difficult to apply

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