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Chapter
Apr 26, 2012

Effect of Areal Averaging on Gauge-Radar Comparison

Publication: World Environmental and Water Resources Congress 2008: Ahupua'A

Abstract

Several issues related to areal averaging of radar estimates and their use in gauge-radar and radar bias adjustment are addressed. A precise method for averaging radar estimates is presented. Comparison estimates using this method and estimates by an approximate method reveals that there can be significant differences. The effect of precise averaging was more pronounced for the S-POL 150 m gate spacing radar data relative to 1 km gate spacing WSR-88D data. Data from two field experiments were analyzed and gauge-radar comparisons were performed. The main steps of the WSR-88D Precipitation Processing System (PPS) adjustment are simulated for an extreme event using areally radar estimates and estimated from the collocated radar bin. Given that areally averaged radar estimates are comparably correlated with gauge estimates, they can be used in the PPS adjustment with confidence.

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Published In

Go to World Environmental and Water Resources Congress 2008
World Environmental and Water Resources Congress 2008: Ahupua'A
Pages: 1 - 10

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Published online: Apr 26, 2012

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Hatim Sharif [email protected]
P.E.
M.ASCE
Assistant Professor, Department of Civil and Environmental Engineering, University of Texas at San Antonio,. E-mail: [email protected]
Fred L. Ogden [email protected]
P.E.
M.ASCE
Roy and Caryl Cline Distinguished Chair of Engineering, Environment, and Natural Resources, University of Wyoming, Laramie, Wyoming. E-mail: [email protected]
Edward Brandes [email protected]
National Center for Atmospheric Research, Boulder, Colorado,. E-mail: [email protected]

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