Comparison of Raindrop Size Distribution Estimates From X-Band and S-Band Polarimetric Observations

This letter evaluates the consistency of rainfall drop size distribution (DSD) parameters that were estimated from attenuation-corrected X-band dual-polarization (XPOL) radar measurements with estimates from a colocated S-band dual-polarization radar (S-Pol). The DSD retrieval technique uses reflect...

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Bibliographic Details
Published in:IEEE geoscience and remote sensing letters 2007-10, Vol.4 (4), p.601-605
Main Authors: Anagnostou, M.N., Anagnostou, E.N., Vivekanandan, J., Ogden, F.L.
Format: Article
Language:English
Subjects:
Attenuation
Attenuation correction
Clouds
Consistency
drop size distribution (DSD)
dual polarization
Estimates
gamma distribution
Mathematical models
Parameter estimation
Polarization
Radar
Radar measurements
Radar polarimetry
Radar remote sensing
Rain
Rainfall
range effects
Reflectivity
Spaceborne radar
X-band
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Summary:This letter evaluates the consistency of rainfall drop size distribution (DSD) parameters that were estimated from attenuation-corrected X-band dual-polarization (XPOL) radar measurements with estimates from a colocated S-band dual-polarization radar (S-Pol). The DSD retrieval technique uses reflectivity and differential reflectivity, and a constrained relationship to estimate the three parameters of a ldquonormalizedrdquo gamma distribution model. The more definitive S-Pol DSD parameter estimates are used as a reference to assess the performance of the corresponding XPOL estimates for different rain-path attenuation values. Results show that XPOL attenuation-corrected profiles can provide rainfall DSD estimations that are consistent to an S-band dual-polarization radar, even in cases of moderate to high rain-path attenuation.
ISSN:1545-598X
1558-0571
DOI:10.1109/LGRS.2007.903061