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On-orbit spectrum calibration method for hyperspectral remote sensing instrument

A hyperspectral remote sensing and spectral calibration technology, which is applied in the field of on-orbit spectral calibration of hyperspectral remote sensing instruments, can solve problems such as the influence of hyperspectral instruments, and achieve the effect of improving accuracy and stability

Active Publication Date: 2018-07-06
NAT SATELLITE METEOROLOGICAL CENT
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Problems solved by technology

This drift has little effect on wide-channel instruments, but can have serious effects on hyperspectral instruments

Method used

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  • On-orbit spectrum calibration method for hyperspectral remote sensing instrument
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  • On-orbit spectrum calibration method for hyperspectral remote sensing instrument

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the embodiment of the present invention. Some, 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 making creative efforts belong to the protection scope of the present invention.

[0025] As an embodiment of the embodiment of the present invention, this embodiment provides a hyperspectral remote sensing instrument on-orbit spectral calibration method, refer to figure 1 , which is a flow chart of an on-orbit spectral calibration method for a hyperspectral remote sensing instrument according to an embodiment of the present invention, including:

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Abstract

The invention provides an on-orbit spectrum calibration method for a hyperspectral remote sensing instrument. The on-orbit spectrum calibration method comprises the steps of: S1, calculating a centralwavelength position of each channel of an on-orbit solar observation spectrum of a target hyperspectral remote sensing instrument based on on-orbit solar observation data and ground calibration coefficients of the target hyperspectral remote sensing instrument; S2, positioning speed information precisely based on a satellite, performing frequency shift correction on the central wavelength position of each channel of the on-orbit solar observation spectrum according to Doppler frequency shift characteristics, and acquiring an effective central wavelength position of each channel of the on-orbit solar observation spectrum; S3, calculating an on-orbit spectrum calibration error of the target hyperspectral remote sensing instrument based on the effective central wavelength position of each channel of the on-orbit solar observation spectrum and a solar standard spectrum standard absorption line position; S4, and performing on-orbit spectrum precise calibration on the target hyperspectral remote sensing instrument based on the on-orbit spectrum calibration error. The on-orbit spectrum calibration method can effectively improve the precision and stability of spectrum calibration.

Description

technical field [0001] The invention relates to the technical field of remote sensing calibration, and more particularly, to an on-orbit spectral calibration method for a hyperspectral remote sensing instrument. Background technique [0002] With the continuous improvement of application requirements, especially the continuous improvement of the demand for quantitative detection of atmospheric components, the requirements for the spectral resolution of satellite remote sensing are also getting higher and higher. Therefore, one of the development directions of modern satellite remote sensing instruments is to have ultra-high spectral resolution. [0003] The carbon satellite successfully launched by my country has carried out high-precision quantitative inversion of CO2 concentration through the observation spectra of weak CO2 absorption band (1.6 μm), strong CO2 absorption band (2.06 μm) and O2-A absorption band (0.76 μm). The resolution can reach 0.03nm, in the range of abo...

Claims

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Application Information

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IPC IPC(8): G01J3/28
CPCG01J3/28G01J2003/2866
Inventor 毕研盟杨忠东王倩
Owner NAT SATELLITE METEOROLOGICAL CENT
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