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Title: Estimation of Depolarization Ratio Using Weather Radars with Simultaneous Transmission/Reception

Abstract

A new methodology for estimating the depolarization ratio (DR) by dual-polarization radars with simultaneous transmission/reception of orthogonally polarized waves together with traditionally measured differential reflectivity ZDR, correlation coefficient ρhυ, and differential phase ΦDP in a single mode of operation is suggested. This depolarization ratio can serve as a proxy for circular depolarization ratio measured by radars with circular polarization. The suggested methodology implies the use of a high-power phase shifter to control the system differential phase on transmission and a special signal processing to eliminate the detrimental impact of differential phase on the estimate of DR. The feasibility of the suggested approach has been demonstrated by retrieving DR from the standard polarimetric variables and the raw in-phase I and quadrature Q components of radar signals and by implementing the scheme on a C-band radar with simultaneous transmission/reception of horizontally and vertically polarized waves. Possible practical implications of using DR include the detection of hail and the determination of its size above the melting layer, the discrimination between various habits of ice aloft, and the possible identification and quantification of riming, which is associated with the presence of supercooled cloud water. Some examples of these applications are presented.

Authors:
 [1];  [2];  [1];  [3];  [1];  [4];  [4];  [5];  [5]
  1. Cooperative Institute for Mesoscale Meteorological Studies, University of Oklahoma, Norman, Oklahoma, NOAA/National Severe Storms Laboratory, Norman, Oklahoma
  2. Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado, NOAA/Earth System Research Laboratory, Boulder, Colorado
  3. NOAA/National Severe Storms Laboratory, Norman, Oklahoma
  4. Enterprise Electronics Corporation, Enterprise, Alabama
  5. Meteorological Institute, University of Bonn, Bonn, Germany
Publication Date:
Research Org.:
Univ. of Colorado, Boulder, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1363726
Alternate Identifier(s):
OSTI ID: 1536980
Grant/Contract Number:  
SC0013306
Resource Type:
Published Article
Journal Name:
Journal of Applied Meteorology and Climatology
Additional Journal Information:
Journal Name: Journal of Applied Meteorology and Climatology Journal Volume: 56 Journal Issue: 7; Journal ID: ISSN 1558-8424
Publisher:
American Meteorological Society
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Meteorology & Atmospheric Sciences

Citation Formats

Ryzhkov, Alexander, Matrosov, Sergey Y., Melnikov, Valery, Zrnic, Dusan, Zhang, Pengfei, Cao, Qing, Knight, Michael, Simmer, Clemens, and Troemel, Silke. Estimation of Depolarization Ratio Using Weather Radars with Simultaneous Transmission/Reception. United States: N. p., 2017. Web. doi:10.1175/JAMC-D-16-0098.1.
Ryzhkov, Alexander, Matrosov, Sergey Y., Melnikov, Valery, Zrnic, Dusan, Zhang, Pengfei, Cao, Qing, Knight, Michael, Simmer, Clemens, & Troemel, Silke. Estimation of Depolarization Ratio Using Weather Radars with Simultaneous Transmission/Reception. United States. doi:10.1175/JAMC-D-16-0098.1.
Ryzhkov, Alexander, Matrosov, Sergey Y., Melnikov, Valery, Zrnic, Dusan, Zhang, Pengfei, Cao, Qing, Knight, Michael, Simmer, Clemens, and Troemel, Silke. Sat . "Estimation of Depolarization Ratio Using Weather Radars with Simultaneous Transmission/Reception". United States. doi:10.1175/JAMC-D-16-0098.1.
@article{osti_1363726,
title = {Estimation of Depolarization Ratio Using Weather Radars with Simultaneous Transmission/Reception},
author = {Ryzhkov, Alexander and Matrosov, Sergey Y. and Melnikov, Valery and Zrnic, Dusan and Zhang, Pengfei and Cao, Qing and Knight, Michael and Simmer, Clemens and Troemel, Silke},
abstractNote = {A new methodology for estimating the depolarization ratio (DR) by dual-polarization radars with simultaneous transmission/reception of orthogonally polarized waves together with traditionally measured differential reflectivity ZDR, correlation coefficient ρhυ, and differential phase ΦDP in a single mode of operation is suggested. This depolarization ratio can serve as a proxy for circular depolarization ratio measured by radars with circular polarization. The suggested methodology implies the use of a high-power phase shifter to control the system differential phase on transmission and a special signal processing to eliminate the detrimental impact of differential phase on the estimate of DR. The feasibility of the suggested approach has been demonstrated by retrieving DR from the standard polarimetric variables and the raw in-phase I and quadrature Q components of radar signals and by implementing the scheme on a C-band radar with simultaneous transmission/reception of horizontally and vertically polarized waves. Possible practical implications of using DR include the detection of hail and the determination of its size above the melting layer, the discrimination between various habits of ice aloft, and the possible identification and quantification of riming, which is associated with the presence of supercooled cloud water. Some examples of these applications are presented.},
doi = {10.1175/JAMC-D-16-0098.1},
journal = {Journal of Applied Meteorology and Climatology},
number = 7,
volume = 56,
place = {United States},
year = {2017},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1175/JAMC-D-16-0098.1

Citation Metrics:
Cited by: 4 works
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