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Comparison of Advanced Radar Polarimetric Techniques for Operational Attenuation Correction at C Band.
- Source :
- Journal of Atmospheric & Oceanic Technology; Jul2008, Vol. 25 Issue 7, p1118-1135, 18p, 1 Diagram, 2 Charts, 11 Graphs
- Publication Year :
- 2008
-
Abstract
- Rain path attenuation correction is a challenging task for quantitative use of weather radar measurements at frequencies higher than S band. The proportionality relationship between specific attenuation α<subscript>hh</subscript> (specific differential attenuation α<subscript>dp</subscript>) and specific differential phase K<subscript>dp</subscript> is the basis for simple path-integrated attenuation correction using differential phase Φ<subscript>dp</subscript>. However, the coefficients of proportionality are known to be dependent upon temperature, on the one hand, and shape and raindrop size distribution, on the other hand. To solve this problem, a Bayesian classification scheme is proposed to empirically find the prevailing rain regime and adapt the Φ<subscript>dp</subscript>-based method. The proposed approach herein is compared with other polarimetric techniques currently available in the literature. Several episodes observed in the Paris, France, area by the C-band dual-polarized weather radar operating in Trappes (France) are analyzed and results are discussed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 07390572
- Volume :
- 25
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Journal of Atmospheric & Oceanic Technology
- Publication Type :
- Academic Journal
- Accession number :
- 35178889
- Full Text :
- https://doi.org/10.1175/2007JTECHA936.1