Remote sensing satellite high-resolution camera in-orbit absolute radiometric calibration method and device

Abstract

The invention discloses a remote sensing satellite high-resolution camera in-orbit absolute radiation calibration method and device. The method comprises the steps of: setting five levels of targets in a preset experiment field region, and uniformly selecting a plurality of sampling points on each target; collecting and measuring the surface reflectance of each sampling point in a preset time period before and after a satellite passes through the five levels of targets through a ground spectrometer; according to the surface reflectance of each sampling point and the acquired other parameters (atmospheric characteristic data, solar diffusion radiation, total radiation data and the like) of a radiation transmission model, determining the entrance pupil radiance of each target in the preset time period before and after imaging of a satellite camera; and calculating to obtain an absolute radiometric calibration coefficient according to the acquired remote sensing satellite high-resolutioncamera image data, the entrance pupil radiance of each target and a preset linear equation model. The technical problem that in the prior art, the requirement for in-orbit absolute radiometric calibration of a high-resolution camera of a high-resolution remote sensing satellite cannot be met is solved.

Description

technical field [0001] The present application relates to the technical field of satellite remote sensing, in particular to a method and device for on-orbit absolute radiometric calibration of a remote sensing satellite high resolution camera. Background technique [0002] With the continuous development of remote sensing satellite technology and the improvement of the spatial resolution of optical remote sensors, the calibrated quantitative remote sensing data has been effectively applied to many industries and has produced significant results. The quantitative application of remote sensing satellite data is a current research hotspot. The key lies in improving the calibration level of remote sensing satellite sensors. However, some data accuracy after different calibrations still cannot meet the needs of industry applications, such as the accuracy of on-orbit absolute radiometric calibration. Therefore, how to improve the accuracy of on-orbit absolute radiometric calibrati...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by this application is: in view of the problem in the prior art that cannot meet the needs of on-orbit absolute radiation calibration of high-resolution remote sensing satellite high-resolution cameras, this application provides an on-orbit absolute radiation calibration of remote sensing satellite high-resolution cameras method and device, in the scheme provided by the embodiment of the present application, on the one hand, high-quality radiance data can be obtained by using five-level targets for radiation calibration; on the other hand, high-resolution camera data, atmospheric characteristic data, and solar The multi-source data of diffuse radiation, total radiation and surface reflectance of each target are used to solve the radiation transfer model, which improves the accuracy of radiation calibration calculation, and then meets the absolute radiation calibration of high-resolution remote sensing satellite high-resolution cameras on orbit. need

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