Abstract

Based on traditional cloud detection methods,the authors developed a new algorithm for detecting night cloud according to characteristics of MODIS sensors which have high spectral resolution and time resolution.The algorithm includes the single-scene cloud detection method and the combined multi-scene cloud detection method.The test of night cloud detection on the N-S seismotectonic zone in China shows that this algorithm is effective in detecting night cloud on the MODIS image,and thus it can provide a basis for the effective application of night MODIS image.

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