Multi-angle polarization satellite cloud detection method integrating spatial and spectral characteristics

Abstract

The invention provides a multi-angle polarization satellite cloud detection method integrating spatial and spectral characteristics. The method comprises the following steps: obtaining observation data of a multi-angle polarization imager pixel at an N-layer angle; according to the observation data of the multi-angle polarization imager pixel at each layer of angle, and according to a land cloud identification result, an ocean cloud identification result, a flare ocean cloud identification result, a mixed pixel identification result or an uncertain pixel identification result corresponding to the multi-angle polarization imager pixel at each layer of angle, determining whether the multi-angle polarization imager pixel at each layer of angle corresponds to the land cloud identification result, the ocean cloud identification result, the flare ocean cloud identification result, the mixed pixel identification result or the uncertain pixel identification result; obtaining a corresponding cloud detection result of the multi-angle polarization imager pixel at each layer angle, and determining the number of times that the multi-angle polarization imager pixel is identified as a cloud, the number of times that the multi-angle polarization imager pixel is identified as a clear sky and the number of times that the multi-angle polarization imager pixel is identified as an uncertain pixel at N layers angles; and determining whether the multi-angle polarization imager pixel is a cloud or not according to the number of times that the multi-angle polarization imager pixel is identified as a cloud, the number of times that the multi-angle polarization imager pixel is identified as a clear sky and the number of times that the multi-angle polarization imager pixel is identified as an uncertain pixel under the N-layer angle.

Description

technical field [0001] The invention relates to the technical field of atmospheric science, in particular to a multi-angle polarization satellite cloud detection method integrating spatial and spectral features. Background technique [0002] Satellite remote sensing has the characteristics of instantaneous imaging, large information detection range, continuous spatial coverage and high spatial resolution. The lack of time-consuming and labor-intensive observation methods is currently one of the most effective means to achieve rapid detection of the earth's land, ocean, atmosphere and other layers, and has become a research hotspot and an important development direction in recent decades. With the development and application of remote sensing technology, quantitative remote sensing has higher and higher requirements on the quality of remote sensing images. Clouds, as the condensation of water vapor in the atmosphere, cover 50% to 70% of the earth's surface in the aggregate st...

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Problems solved by technology

[0006] The present invention provides a multi-angle polarized satellite cloud detection method that integrates spatial and spectral features to solve the problem that there is no cloud detection method suitable for the domestic multi-angle polarized satellite sensor DPC / GF-5 in the prior art

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