Extended Abstract (212K)9.4
An improved GOES parallax correction scheme for rainfall estimation
J. Clay Davenport, I.M. Systems Group, Inc, Camp Springs, MD; and R. J. Kuligowski
Parallax can significantly affect the apparent location of clouds in satellite imagery, which presents problems for rainfall estimation and other cloud-related applications. As the spatial fields of view of satellite instruments continue to become finer, the parallax errors relative to pixel size will continue to grow.
A basic parallax correction scheme described in Vicente et al. (2001) is part of the routine production of satellite rainfall estimates at the NOAA/NESDIS Center for Satellite Applications and Research and corrects a substantial portion of the parallax errors. However, it assumes a standard vertical profile of temperature and thus is subject to errors as a result of incorrectly assigned cloud-top heights. The parallax correction scheme has been modified to use temperature profiles from a numerical weather model in place of the standard profiles. The performance of both the original and new schemes will be compared.
Session 9, Advances in Remote Sensing and Data Assimilation in Hydrology
Thursday, 24 January 2008, 8:45 AM-9:30 AM, 223
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