Algorithm for Estimation of the Specific Differential Phase

The specific differential phase Kdp is one of the important parameters measured by dual-polarization radar that is being considered for the upgrade of the current Next Generation Weather Radar (NEXRAD) system. Estimation of the specific differential phase requires computing the derivative of range p...

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Bibliographic Details
Published in:Journal of atmospheric and oceanic technology 2009-12, Vol.26 (12), p.2565-2578
Main Authors: Wang, Yanting, Chandrasekar, V
Format: Article
Language:English
Subjects:
Algorithms
Climatology
Derivatives
Estimates
Estimation bias
Fluctuation
Marine
Meteorology
Radar
Radar systems
Studies
Weather
Wrapping
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Summary:The specific differential phase Kdp is one of the important parameters measured by dual-polarization radar that is being considered for the upgrade of the current Next Generation Weather Radar (NEXRAD) system. Estimation of the specific differential phase requires computing the derivative of range profiles of the differential propagation phase. The existence of possible phase wrapping, noise, and associated fluctuation in the differential propagation phase makes the evaluation of derivatives an unstable numerical process. In this paper, a robust algorithm is presented to estimate the specific differential phase, which is able to work on wrapped phases and keep up with the spatial gradients of rainfall, to provide a high-resolution specific differential phase.
ISSN:0739-0572
1520-0426
DOI:10.1175/2009JTECHA1358.1