Optical remote sensing satellite radiation cross calibration method based on stable radiation source

An optical remote sensing and radiation source technology, which is applied in complex mathematical operations, image data processing, instruments, etc., and can solve problems such as detector performance decay, spaceborne blackbody performance decay, and remote sensing satellite absolute radiation benchmark calibration.

Pending Publication Date: 2022-01-11
NO 63921 UNIT OF PLA
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Problems solved by technology

However, due to the influence of the atmosphere, it is difficult to directly use the ground calibration field to perform radiometric calibration of the spaceborne optical camera in a specific optical spectrum b...

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  • Optical remote sensing satellite radiation cross calibration method based on stable radiation source

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[0026] In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that are used in the embodiments. Apparently, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings without creative efforts.

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, and the embodiments cannot be repeated here one by one, but the embodiments of the present invention are not therefore limited to the following embodiments.

[0028] The optical remote sensing satellite radiation cross calibration method based on a stable radiation source of the present invention is based on a mature two-point calibration method after obtaining the calibration results inside and outside the ground vacuum...

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Abstract

The invention relates to an optical remote sensing satellite radiation cross calibration method based on a stable radiation source, and the method comprises the following steps: a, carrying out the calibration of an optical remote sensing satellite through a satellite-borne black body, and obtaining a calibration coefficient; b, calculating a radiation value of the stable radiation source according to the calibration coefficient; c, repeating the step (a) and the step (b) to obtain a series of calibration coefficients and radiation values; and d, selectively performing radiation correction according to the decay condition of the radiation measurement performance of the optical remote sensing satellite. The method can achieve the stable correction of the in-orbit absolute radiation reference of the optical remote sensing satellite, and provides support for the quantitative processing and application of remote sensing data.

Description

technical field [0001] The invention relates to a radiation cross calibration method for optical remote sensing satellites based on a stable radiation source. Background technique [0002] Radiation calibration is an important task for optical remote sensing satellites in orbit. Its main content is to calibrate the radiometric capability of the on-board optical camera to achieve single-satellite or multi-satellite radiometric calibration. In the prior art, the calibration work is usually completed by means of space-borne blackbody and ground calibration field. However, due to the influence of the atmosphere, it is difficult to directly use the ground calibration field to calibrate the spaceborne optical camera in a specific optical spectrum. At the same time, there are also problems such as performance decay and detector performance decay of spaceborne black bodies, so it is difficult to calibrate the absolute radiation reference of remote sensing satellites. It can be see...

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Application Information

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IPC IPC(8): G06T7/80G06F17/16
CPCG06T7/80G06F17/16G06T2207/10032
Inventor 薛永宏陈敏乔凯张磊樊士伟
Owner NO 63921 UNIT OF PLA
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