Validation of the Rain Profiling Algorithm 'ZPHI' from the C-Band Polarimetric Weather Radar in Darwin
| Autor: | J. Testud, Erwan Le Bouar, Thomas D. Keenan |
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| Rok vydání: | 2001 |
| Předmět: | |
| Zdroj: | Journal of Atmospheric and Oceanic Technology. 18:1819-1837 |
| ISSN: | 1520-0426 0739-0572 |
| Popis: | An extensive application of a rain profiling algorithm (ZPHI) employing a C-band polarimetric radar (the C-POL radar of the Australian Bureau of Meteorology Research Centre in Darwin) is presented. ZPHI belongs to the class of rain profiling algorithms that have been developed for spaceborne or airborne radars operating at attenuating frequencies. By nature, these algorithms are nonlocal: the full profile of the measured radar reflectivity is inverted to derive a retrieved profile of the rainfall rate. The retrieval accuracy lays in the imposition of an “external constraint” in the inversion procedure. In this case, that is supplied by the differential phase shift ΦDP. The primary products of ZPHI are the profile along the beam of the specific attenuation A, and the “normalized” intercept parameter N*0. The rainfall rate is further estimated through an R–A relation adjusted for N*0. ZPHI solves automatically two problems met when operating at C band: the along-path attenuation and the variability... |
| Databáze: | OpenAIRE |
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