On-orbit spectrum calibration method of hyperspectral remote sensor based on atmospheric profile and LED

Abstract

The invention discloses an on-orbit spectrum calibration method of a hyperspectral remote sensor based on an atmospheric profile and an LED. The method includes the steps of separately utilizing the known atmospheric profile and an LED spectrum to calibrate and correct spectrum deviation of the hyperspectral remote sensor, comparing a spectral calibration result based on the atmospheric profile with a spectral calibration result based on the LED, analyzing the comparison result, and determining that the spectral calibration precision of the hyperspectral remote sensor is reached if the difference between the two calibration results is not greater than 5%. The method aims to overcome the defects of existing on-orbit calibration technologies of the hyperspectral remote sensors, combine an atmospheric profile calibration technology with an LED calibration technology, mutually verify the calibration results of different spectra, improve the on-orbit spectrum calibration precision of the hyperspectral remote sensor, and correspondingly ensure the reliability and value of quantitative application of remote sensing data.

Description

technical field [0001] The invention belongs to the field of optical remote sensing science, and relates to an on-orbit spectrum calibration method of a hyperspectral remote sensor based on an atmospheric profile and an LED. Background technique [0002] Hyperspectral imaging technology is a remote sensing technology developed in the 1980s. Different from traditional spectrometers, hyperspectral imaging technology integrates image and spectrum (integration of map and spectrum). Simultaneously acquire the continuous and fine spectral information of the target, which greatly improves the detection capability of space remote sensing, and has important applications in the fields of national defense, military, land and resource investigation, agricultural production estimation, environmental monitoring, and atmospheric detection. High-precision calibration is the premise and basis for the quantitative application of hyperspectral remote sensors. Before the launch of hyperspectral...

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Problems solved by technology

[0004] The present invention proposes an on-orbit spectral calibration method for hyperspectral remote sensors based on atmospheric profiles and LEDs. Atmospheric profile calibration and LED calibration technology mutually verify the calibration results of different spectra, which improves the accuracy of on-orbit spectral calibration of hyperspectral remote sensors, thereby ensuring the reliability and reliability of remote sensing data quantitative applications. value

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