31 January 2001 Improved cloud detection in AVHRR daytime and nighttime scenes over the ocean
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Abstract
Accurate cloud detection is needed for many geophysical applications. Unfortunately, a significant source of residual error in such satellite-based products is undetected cloud. Here, a new computationally efficient cloud detection procedure for both daytime and nightime Advanced Very High Resolution Radiometer data is developed. It differs substantially from out prior related work. First, a new clustering procedure is used which produces very homogeneous and distinct clusters. Second, the input information vector is reduced in size, incorporates both radiance and spatial components and each components is normalized. Third, the enhanced performance makes possible the use of a multipass procedure which is very effective in identifying the complex multilayer cloud structures common in satellite data. Validation with independent lidar observations confirms the accuracy of the new procedure. Marine low stratiform clouds also are detected effectively.
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James Simpson, James Simpson, T. McIntire, T. McIntire, J. Stitt, J. Stitt, Gary Hufford, Gary Hufford, } "Improved cloud detection in AVHRR daytime and nighttime scenes over the ocean", Proc. SPIE 4168, Remote Sensing of Clouds and the Atmosphere V, (31 January 2001); doi: 10.1117/12.413879; https://doi.org/10.1117/12.413879
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