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Impact analysis method of imaging spectrometer radiometric calibration precision on data quality

An imaging spectrometer and radiometric calibration technology, applied in the field of analysis of the impact of imaging spectrometer radiometric calibration accuracy on data quality

Active Publication Date: 2014-12-31
青岛唯实空间数据科技有限公司
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Problems solved by technology

Obviously, the accuracy of radiometric calibration will affect the accuracy of the restored radiance, but how the uncertainty obtained from the square and root of each uncertainty component is used to evaluate the data quality of remote sensing data, there is no relevant analysis at present

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  • Impact analysis method of imaging spectrometer radiometric calibration precision on data quality
  • Impact analysis method of imaging spectrometer radiometric calibration precision on data quality
  • Impact analysis method of imaging spectrometer radiometric calibration precision on data quality

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Embodiment Construction

[0029] The specific embodiment of the present invention is as figure 1 shown. Taking the laboratory radiation calibration of a certain type of imaging spectrometer as an example, the specific steps are as follows:

[0030] Step 1: Complete the radiometric calibration experiment of the imaging spectrometer and obtain the radiometric calibration results.

[0031] Take the radiation calibration based on the standard irradiance lamp as an example: the radiation standard is transferred as figure 2 , using the diffuse reflector to convert the standard spectral irradiance of the standard lamp into the standard spectral radiance, and using it to calibrate the spectral responsivity of the spectroradiometer composed of a monochromator and a photomultiplier tube. Then the spectral radiance of the integrating sphere is calibrated by a spectroradiometer, and finally the radiance response of the imaging spectrometer is calibrated by an integrating sphere with known spectral radiance.

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Abstract

An impact analysis method of imaging spectrometer radiometric calibration precision on data quality includes six steps. Uncertainty of entrance pupil radiance in an imaging spectrometer radiometric calibration process is computed by analyzing uncertainty origins impacting the entrance pupil radiance in a laboratory radiometric calibration process and uncertainty of each impact quantity, probability distribution of the entrance pupil radiance is obtained by the central limit theorem, further the uncertainties of calibration coefficients and the probability distribution form of the calibration coefficients are obtained by computing of two-dimensional random variables and function probability distribution, and finally uncertainty and probability distribution of recovery radiance are obtained. The method can be used for analyzing impacts of the radiometric calibration precision on the imaging spectrometer remote sensing data quality, so that precision of remote sensing data simulation is improved beneficially, and the remote sensing data quality can be more effectively evaluated in a remote sensing process.

Description

technical field [0001] The invention relates to a method for analyzing the influence of imaging spectrometer radiation calibration precision on data quality, which can be used to evaluate the reliability of radiance measurement of imaging spectrometer, improve calibration precision and data quality. It is beneficial to more accurately analyze the reliability of the data cube information obtained by the remote sensing detection of the imaging spectrometer, and has guiding significance for the data simulation of the hyperspectral imager under different radiometric calibration accuracy. It belongs to the technical field of hyperspectral remote sensing detection. Background technique [0002] Hyperspectral remote sensing technology is a brand-new remote sensing technology that has developed rapidly in recent years. It uses imaging spectrometers to simultaneously image surface objects in tens or hundreds of bands with nanoscale spectral resolution, and can obtain the information ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/28
Inventor 贾国瑞雷浩赵慧洁张颖
Owner 青岛唯实空间数据科技有限公司
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