Method for determining full-field-of-view apparent spectral radiance of satellite-borne optical remote sensor

Abstract

The invention discloses a method for determining full-field-of-view apparent spectral radiance of a satellite-borne optical remote sensor. The method comprises the steps that firstly, an optical remote sensing satellite observation model and a scene are simulated, a satellite remote sensor model, an observation object, a satellite orbit and an attitude parameter are set, and the scene is restrained; secondly, an optical remote sensing satellite full-field-of-view observation parameter is calculated; finally, the optical remote sensing satellite full-field-of-view apparent spectral radiance is determined. According to the method, determination of the apparent spectral radiance received by the remote sensor is based on a radiation transfer theory, and simulation is conducted on the whole radiation transfer link including the earth, a ground object target, the background characteristics, the atmospheric conditions and the satellite-borne optical remote sensor according to the operating characteristics of a satellite platform and the remote sensor; the apparent spectral radiance received by the view field positions corresponding to pixels at different positions of the focal plane of the remote sensor is determined according to the pixels one by one through radiation transfer model software.

Description

technical field [0001] The invention relates to a method for determining the apparent spectral radiance of a full field of view of a space-borne optical remote sensor, especially for an optical satellite equipped with a wide field of view remote sensor or an optically agile satellite equipped with a high-resolution remote sensor. Background technique [0002] The remote sensing information received by the optical satellite remote sensor is the radiation that is transmitted to the remote sensor through the earth's surface after the solar radiation passes through the atmosphere. The solar radiation information reflected by objects on the earth's surface reaches the entrance pupil of the remote sensor after the scattering and absorption of the atmosphere, atmospheric turbulence, atmospheric radiation, sky background radiation, and surface interference background radiation, and then reaches the entrance pupil of the remote sensor, passes through the optical system, and is finally...

AI Technical Summary

Problems solved by technology

But the problem is that these calculations and analyzes do not consider the working mode and characteristic parameters of satellites and remote sensors, and simplify the ground objects, atmospheric conditions, and strict imaging constraints between remote sensors during the imaging process of remote sensors. The calculation of the apparent spectral radiance of optical satellites is performed using the parameters of the optical satellite. The calculation results are not accurate, and will bring large errors to subsequent satellite applications such as the adjustment of on-orbit imaging parameters and the quantitative remote sensing application of satellite data products.

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