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On-orbit radiation calibration system and method for space camera based on active radiation illumination source

A space camera and radiation calibration technology, applied in the field of space optics, can solve the problems of long on-orbit calibration period, low calibration frequency, and labor and material resources consumption, so as to reduce the calibration cost, increase the calibration frequency, and facilitate transportation. Effect

Active Publication Date: 2022-03-18
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

Because these on-orbit calibration methods use a fixed calibration field, they are affected by factors such as weather factors in the calibration field, satellite return cycle, target laying, mirror placement, etc., resulting in long on-orbit calibration periods, low calibration frequencies, Issues that consume a lot of manpower and material resources

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  • On-orbit radiation calibration system and method for space camera based on active radiation illumination source
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  • On-orbit radiation calibration system and method for space camera based on active radiation illumination source

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[0039] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0040] The terms "first", "second", "third", "fourth", "fifth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects without necessarily being used to describe a particular order or sequence. It is to be understood that the terms so used are interchangea...

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Abstract

The on-orbit radiation calibration method for space cameras based on active radiation illumination sources provided by the present invention uses multiple active radiation illumination sources to provide the required radiation brightness for space camera on-orbit radiation calibration, and has the advantages of small size, light weight, and large divergence angle. , convenient transportation, and flexible selection of calibration locations. The on-orbit calibration system composed of multiple active radiation illumination sources is equivalent to a movable radiation calibration field. According to the calibration tasks of the on-orbit satellites, the calibration location can be flexibly selected. , to avoid the influence of unfavorable factors such as weather, greatly shorten the calibration task period, increase the calibration frequency, and reduce the calibration cost, which will play an important role in the field of on-orbit radiation calibration of space cameras in the future. The invention also provides an on-orbit radiation Calibration system.

Description

technical field [0001] The invention relates to the field of space optics, in particular to an on-orbit radiation calibration system and method for a space camera. Background technique [0002] With the rapid development of space optical remote sensors, the demand for quantification of optical remote sensing applications is increasingly urgent. Radiometric calibration is used to establish the response relationship between the output gray value of space cameras and the radiance of ground objects, and then satellite images can be used to invert ground objects. radiance information. After the space camera is in orbit, affected by factors such as the space environment and high-energy particle radiation, the radiation response performance of the optical remote sensor decreases, and the image quality decreases accordingly. It is necessary to re-obtain the absolute radiation response through on-orbit radiation calibration to improve image quality and at the same time , to meet the...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 李宪圣刘洪兴任建伟陈长征
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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