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Open AccessArticle

Comparison of Radar-Based Hail Detection Using Single- and Dual-Polarization

Institute of Atmospheric Physics, Czech Academy of Sciences, 141 00 Prague, Czech Republic
Author to whom correspondence should be addressed.
Remote Sens. 2019, 11(12), 1436;
Received: 15 May 2019 / Revised: 12 June 2019 / Accepted: 12 June 2019 / Published: 17 June 2019
(This article belongs to the Special Issue Radar Polarimetry—Applications in Remote Sensing of the Atmosphere)
PDF [2267 KB, uploaded 21 June 2019]


The comparative analysis of radar-based hail detection methods presented here, uses C-band polarimetric radar data from Czech territory for 5 stormy days in May and June 2016. The 27 hail events were selected from hail reports of the European Severe Weather Database (ESWD) along with 21 heavy rain events. The hail detection results compared in this study were obtained using a criterion, which is based on single-polarization radar data and a technique, which uses dual-polarization radar data. Both techniques successfully detected large hail events in a similar way and showed a strong agreement. The hail detection, as applied to heavy rain events, indicated a weak enhancement of the number of false detected hail pixels via the dual-polarization hydrometeor classification. We also examined the performance of hail size detection from radar data using both single- and dual-polarization methods. Both the methods recognized events with large hail but could not select the reported events with maximum hail size (diameter above 4 cm). View Full-Text
Keywords: hail detection; hailstone size; weather radar; single-polarization radar; dual-polarization radar hail detection; hailstone size; weather radar; single-polarization radar; dual-polarization radar

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Skripniková, K.; Řezáčová, D. Comparison of Radar-Based Hail Detection Using Single- and Dual-Polarization. Remote Sens. 2019, 11, 1436.

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