Rainfall spatial variability observed by X-band weather radar and its implication for the accuracy of rainfall estimates |
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Authors: | E. Moreau J. Testud E. Le Bouar |
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Affiliation: | NOVIMET, 10-12 Avenue de l’Europe, 78140 Velizy, France |
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Abstract: | The main objective of this paper is to estimate the error in the rainfall derived from a polarimetric X-band radar, by comparison with the corresponding estimate of a rain gauge network. However the present analysis also considers the errors inherent to rain gauge, in particular instrumental and representativeness errors. A special emphasis is addressed to the spatial variability of the rainfall in order to appreciate the representativeness error of the rain gauge with respect to the 1 km square average, typical of the radar derived estimate. For this purpose the spatial correlation function of the rainfall is analyzed. |
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Keywords: | Quantitative precipitation estimation (QPE) X-band radar |
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