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Detection and estimation of reflectivity gradients in the radar resolution volume using multiparameter radar measurements

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3 Author(s)
Scarchilli, G. ; Ist. di Fisica dell''Atmos., CNR, Rome, Italy ; Gorgucci, E. ; Chandrasekar, V.

Multiparameter radar measurements of rainfall, namely, reflectivity factor ZH, differential reflectivity ZDR , and specific differential phase KDP lie in a constrained three-dimensional (3D) space and therefore measurement of Z H, ZDR, or, KDP should be consistent with the other two. This self-consistency relationship between ZH , ZDR, and KDP is valid when the radar resolution volume is homogeneous. When there are reflectivity gradients within the radar resolution cell, the self-consistency relation is perturbed. This perturbation can be utilized to detect the presence of gradients in the radar resolution volume. This paper presents a technique to detect and estimate reflectivity gradients in the resolution cell. The technique is evaluated using theoretical analysis as well as experimental data collected by the NCAR CP-2 radar. It is demonstrated that the presence of reflectivity gradients larger than a few decibels can be detected using the algorithm developed in this paper

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Geoscience and Remote Sensing, IEEE Transactions on  (Volume:37 ,  Issue: 2 )