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In-orbit scaling spectrum radiation observation and self-calibration method of satellite remote sensor

A technology of spectral radiation and satellite remote sensing, applied in the field of spectral radiation observation and self-calibration of satellite remote sensor on-orbit calibration, can solve problems such as difficulty in implementation, and achieve the effects of improving work efficiency, convenient operation, and simple calibration process

Inactive Publication Date: 2018-12-07
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

The radiance-based method uses the synchronous observation of aerial remote sensors and satellite remote sensors for calibration, but it involves aircraft coordination, instrument observation and other issues, and it is difficult to implement

Method used

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  • In-orbit scaling spectrum radiation observation and self-calibration method of satellite remote sensor
  • In-orbit scaling spectrum radiation observation and self-calibration method of satellite remote sensor
  • In-orbit scaling spectrum radiation observation and self-calibration method of satellite remote sensor

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Embodiment Construction

[0044] The implementation of spectral radiation observation and self-calibration method that can realize on-orbit calibration of satellite remote sensors is as follows: figure 1 As shown, it includes integrating sphere protective cover 1, integrating sphere upper light inlet 2, sky illuminance observation integrating sphere 3, integrating sphere light outlet 4, integrating sphere light baffle 5, integrating sphere lower light inlet 6, reflection brightness observation lens 7. Observation lens light entrance 8, reflected radiance observation aperture 9, solar direct irradiance observation aperture 10, spectrometer 11, light guide optical fiber 12, direct solar occluder 13.

[0045] A protective cover 1 is installed at the upper light entrance of the integrating sphere 3 to protect the inner wall from dust and moisture. Both the upper light entrance 2 and the lower light entrance 6 of the integrating sphere are blocked by a baffle plate to protect the inner wall of the integrati...

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Abstract

The invention discloses an in-orbit scaling spectrum radiation observation and self-calibration method of a satellite remote sensor. An automatic control and collection unit switches the same opticalobservation system and a spectrometer to work in either a spectrum radiation observation work mode or an observation self-calibration work mode, and thus, the total sky illuminance, sky diffusion illuminance, reflection radiation brightness and direct solar radiation irradiance are observed; in the spectrum radiation observation mode, the total illuminance and reflection radiation brightness can be detected, and a direct spectrum radiation observation result is obtained; in the self-calibration mode of spectrum radiation observation, the direct solar radiation irradiance can be observed in twomanners, and an observation self-calibration coefficient is obtained. Thus, the spectrum radiation observation data can be calibrated in real time, and the method has significance is application in the technical fields of optical radiation measurement, optical radiation scaling and satellite remote sensor scaling.

Description

technical field [0001] The invention relates to the technical fields of optical radiation measurement, optical radiation calibration and satellite remote sensor calibration, in particular to a spectral radiation observation and self-calibration method for on-orbit calibration of satellite remote sensors. Background technique [0002] The performance decay of the satellite remote sensor is continuous during the on-orbit period. Only through the real-time calibration and correction of the satellite remote sensor on-orbit calibration can the real change of the earth system and the decay of the load itself be effectively distinguished, and the high-precision quantification of the satellite remote sensor can be realized. remote sensing needs. [0003] At present, there are reflectivity-based methods, irradiance-based methods, and radiance-based methods for on-orbit field calibration based on land fields in the world. Among them, the reflectance-based method is to conduct site re...

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Application Information

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IPC IPC(8): G01J3/28
CPCG01J3/28G01J2003/2866
Inventor 刘恩超李新张艳娜郑小兵
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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