Improved cloud detection in AVHRR daytime and nighttime scenes over the ocean

James Simpson; T. McIntire; J. Stitt; Gary Hufford

doi:10.1117/12.413879

31 January 2001 Improved cloud detection in AVHRR daytime and nighttime scenes over the ocean

James Simpson, T. McIntire, J. Stitt, Gary Hufford

Proceedings Volume 4168, Remote Sensing of Clouds and the Atmosphere V; (2001) https://doi.org/10.1117/12.413879
Event: Europto Remote Sensing, 2000, Barcelona, Spain

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.

Citation Download Citation

James Simpson, T. McIntire, J. Stitt, and 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); https://doi.org/10.1117/12.413879

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