Integrating sphere transmission radiometer for ontrack spectrum radiation absolute calibration for remote sensor

Abstract

An integrating sphere transmission radiometer for ontrack spectrum radiation absolute calibration for a remote sensor belongs to the field of ontrack spectrum radiation calibration for a remote sensor. The radiometer comprises an integrating sphere main body, an optical filter detector module and a photoelectric measuring module. The integrating sphere main body is equipped with two openings inside. Reflected light enters, through the two openings, the optical filter detector module and the photoelectric measuring module that are fixed outside the integrating sphere main body. Diffuse reflection paint coats the inside of the integrating sphere main body. The integrating sphere transmission radiometer has the capability of measuring low-power signals in a highly precise manner, exhibits the stable performance for a long period of time, and can serve as a standard space ontrack traceablility low temperature radiometer. The integrating sphere transmission radiometer has the characteristics of converting a power reference into a radiance reference and exhibiting high resolution and low uncertainty reference transmission, so the problem of high-precision ontrack traceablility to SI spectrum radiance absolute calibration for an imaging spectrometer, a satellite remote sensor load and the like is well solved.

Description

technical field [0001] The invention belongs to the field of on-orbit spectral radiation calibration of remote sensors, and relates to an integrating sphere transfer radiometer used for absolute calibration of on-orbit spectral radiation of satellite remote sensors. Background technique [0002] With the continuous and in-depth research of several major issues such as global warming, high-resolution earth observation, and extreme disaster prediction, the demand for high-quality space remote sensing data that can be traced to a unified radiation reference is becoming more and more urgent. Due to the lack of a high-precision unified radiation reference in the existing satellite optical remote sensing payload spectral radiometric calibration, there are large measurement errors in the remote sensing data of a large number of satellites, which makes it difficult for the existing remote sensing satellites to meet the needs of certain fields such as climate, resources and the enviro...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the volume and weight of the space load, the received solar radiation value is directly limited. When it is applied to the narrow bandwidth spectrum level, the radiation value is already very weak. How to monitor it and use it for remote sensor spectral radiation calibration is the key question

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