Method and device for on-orbit spectral calibration of broadband remote sensor
A spectral calibration and remote sensor technology, which is applied in the field of broadband remote sensor on-orbit spectral calibration methods and devices, can solve problems such as inability to measure, and achieve the effect of improving data quality
Active Publication Date: 2021-03-05
NAT SATELLITE METEOROLOGICAL CENT
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[0004] The embodiment of the present invention provides an on-orbit spectral calibration method and device for a wide-band remote sensor, which is used to solve the defect that the spectral response vector cannot be measured on-orbit in the prior art
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[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments 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 creative efforts fall within the protection scope of the present invention.
[0030] figure 1 A schematic flow chart of the broadband remote sensor on-orbit spectral calibration method provided by the embodiment of the present invention, such as figure 1 As shown, the method includes:
[0031] S101. Obtain a spectral observation matrix, satellite observation data and preset spectral response vectors;
[0032] S102. Obtai...
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An embodiment of the present invention provides a broadband remote sensor on-orbit spectral calibration method and device, the method comprising: acquiring a spectral observation matrix, satellite observation data, and a preset spectral response vector; using the spectral observation matrix and the satellite The objective function of the spectral response vector is obtained from the observation data, and the gradient of the objective function relative to the preset spectral response vector is obtained by calculation; according to the objective function, the target spectral response vector is calculated, and the target spectral response vector makes the The above gradient and / or objective function can reach the pre-set standard, realize the calculation of the spectral response on the orbit and then complete the spectral calibration, which is of great significance to the improvement of the data quality of all channel detectors.
Description
technical field [0001] The embodiments of the present invention relate to the technical field of data processing, in particular to a method and device for on-orbit spectral calibration of a broadband remote sensor. Background technique [0002] Satellite data must undergo strict data preprocessing processes such as decoding, positioning, and calibration, from the original data released from the satellite to the satellite observation radiation products provided to users. The calibration accuracy of satellite data is the basic guarantee for its quantitative application. The observation accuracy of satellite data is not only related to the level of satellite and instrument manufacturing technology, but also the calibration problem in the process of ground data preprocessing is one of the key links, which directly affects the quantitative application ability of satellite data. The calibration process mainly includes radiometric calibration and spectral calibration. Spectral ca...
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IPC IPC(8): G01J3/28
CPCG01J3/28G01J2003/2866
Inventor 徐娜胡秀清马刚陈林徐寒列
Owner NAT SATELLITE METEOROLOGICAL CENT