Due to the scattering and reflection of the terrestrial atmosphere, especially when there are clouds or any different
geographical circumstances, the visible earth sensor on the satellite will receive changing atmospheric radiation.
Therefore, the images received by the detector of visible earth sensor will have fuzzy boundaries, thus affecting the
measurement accuracy of geocentric vector. In order to eliminate the impact of the existence of the atmosphere in the
Sun-Earth-Sensor path on earth sensing imaging, the emphasis of our study lies on the issue of atmospheric brightness
distributions. Firstly, we briefly discuss the influence factors of atmospheric brightness at the visible earth sensor, using
the atmospheric radiation transfer model MODTRAN4. Then, by running MODTRAN4 under a specific physical model,
we successfully acquire both graphs and numerical results of the atmospheric brightness distributions in the full field of
view of the visible earth sensor under different circumstances. Based on the research of this paper, given the specific
structure and parameters of the detector of earth sensor, calculating the illumination intensity on the image plane is
possible.
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