A Method for On-orbit Spectral Calibration of Hyperspectral Remote Sensing Instruments

A technology of hyperspectral remote sensing and spectral calibration, 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
CN108254074BActive Publication Date: 2019-11-26NAT SATELLITE METEOROLOGICAL CENT
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NAT SATELLITE METEOROLOGICAL CENT
Publication Date
2019-11-26

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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.
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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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