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A Quality Control Concept for Radar Reflectivity, Polarimetric Parameters, and Doppler Velocity

Friedrich, Katja and Hagen, Martin and Einfalt, Thomas (2006) A Quality Control Concept for Radar Reflectivity, Polarimetric Parameters, and Doppler Velocity. Journal of Atmospheric and Oceanic Technology, 23, pp. 865-887. DOI: 10.1175/JTECH1920.1.

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Abstract

Over the last few years the use of weather radar data has become a fundamental part of various applications like rain-rate estimation, nowcasting of severe weather events, and assimilation into numerical weather prediction models. The increasing demand for radar data necessitates an automated, flexible, and modular quality control. In this paper a quality control procedure is developed for radar reflectivity factors, polarimetric parameters, and Doppler velocity. It consists of several modules that can be extended, modified, and omitted depending on the user requirement, weather situation, and radar characteristics. Data quality is quantified on a pixel-by-pixel basis and encoded into a quality-index field that can be easily interpreted by a nontrained end user or an automated scheme that generates radar products. The quality-index algorithms detect and quantify the influence of beam broadening, the height of the first radar echo, ground clutter contamination, return from non-weather-related objects, and attenuation of electromagnetic energy by hydrometeors on the quality of the radar measurement. The quality-index field is transferred together with the radar data to the end user who chooses the amount of data and the level of quality used for further processing. The calculation of quality-index fields is based on data measured by the polarimetric C-band Doppler radar (POLDIRAD) located in the Alpine foreland in southern Germany.

Document Type:Article
Title:A Quality Control Concept for Radar Reflectivity, Polarimetric Parameters, and Doppler Velocity
Authors:
AuthorsInstitution or Email of Authors
Friedrich, KatjaUNSPECIFIED
Hagen, MartinUNSPECIFIED
Einfalt, Thomaseinfalt&hydrotec GbR, Lübeck
Date:2006
Journal or Publication Title:Journal of Atmospheric and Oceanic Technology
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:23
DOI:10.1175/JTECH1920.1
Page Range:pp. 865-887
Status:Published
Keywords:C-band Doppler radar, Doppler velocity, the Alps
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Cloud Physics and Traffic Meteorology
Deposited By: Jana Freund
Deposited On:06 Oct 2006
Last Modified:11 Nov 2014 21:56

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