On-board radiation calibration system and method for deep space exploration imaging spectrometer
An imaging spectrometer and radiometric calibration technology, applied in optical radiometry, spectrometry/spectrophotometry/monochromator, instruments, etc., can solve the problem that the timeliness and reliability of on-board radiometric calibration cannot be guaranteed at the same time, etc. question
Active Publication Date: 2022-08-02
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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However, in the field of deep space exploration, due to various factors such as orbital period, imaging angle, and satellite load design limitations, it is impossible to continuously implement on-board radiation calibration with the sun as the light source, so that the on-board radiation calibration Timeliness and reliability cannot be guaranteed at the same time
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[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings, but the present embodiment is not limited to the present invention, and any similar methods and similar changes of the present invention should be included in the protection scope of the present invention.
[0036] 1. If figure 1 As shown in the figure, the on-board radiation calibration system of the deep space exploration imaging spectrometer is first designed and installed, which includes a cosine corrector 1, an integrating sphere 2, a calibration lamp 3, a baffle 4, an optical fiber 5, a control line 6, and a controller 7. ,in:
[0037] The cosine corrector 1 and the integrating sphere 2 are fixed outside the spaceborne imaging spectrometer. The cosine corrector 1 and the integrating sphere 2 are connected to the imaging spectrometer through the optical fiber 5, and the 475-480 yuan of the spaceborne imaging spectrometer detector is used as the imaging ima...
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The invention discloses an on-board radiation calibration system and method for a deep space exploration imaging spectrometer. The system comprises a cosine corrector, an integrating sphere, a calibration lamp, a baffle, an optical fiber, a control line and a controller. The system designs and develops a spaceborne imaging spectrometer through steps (1), after the satellite is launched and arrives at the imaging target area, the radiation calibration on the solar-inducing star and the radiation calibration on the integrating sphere-lighting star are carried out successively; (2) respectively Calculate the radiation calibration coefficients on the sun-induced and integrating sphere-light stars, and obtain the two on-star radiation calibration coefficients; (3) Compare the difference between the two radiation calibration coefficients, and use the solar radiation calibration coefficient to compare the The calibration coefficient of integrating sphere light radiation is used for correction; (4) the signal value of imaging data is converted into radiance according to the calibration coefficient of radiation on the satellite. The system and method of the invention enables both timeliness and reliability of the on-board radiation calibration, and ensures the continuity and effectiveness of the on-board radiation calibration.
Description
technical field [0001] The invention relates to the technical field of deep space exploration, in particular to an on-board radiation calibration system and method for a deep space exploration imaging spectrometer. Background technique [0002] Hyperspectral imaging technology has the characteristic of unifying the spectrum, which can not only obtain the two-dimensional image information related to the spatial characteristics of the imaging target, but also obtain the spectral information related to the material composition of the target. Imaging spectroscopy technology is not only widely used in earth observation, medical identification, chemical analysis and testing and other fields, but also in the field of deep space exploration. A number of satellites have been launched at home and abroad for the detection of the material composition of celestial bodies such as the moon, Mars, and asteroids. These satellites are equipped with imaging spectrometers with different perform...
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IPC IPC(8): G01J3/28
CPCG01J3/2823G01J2003/2866
Inventor 何志平徐睿李春来袁立银吕刚刘成玉金健
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI