Correlation Coefficients between Horizontally and Vertically Polarized Returns from Ground Clutter

Abstract Characteristics of the magnitude and phase of correlation coefficients between horizontally and vertically polarized returns from ground clutter echoes are quantified by analyzing histograms obtained with an 11-cm wavelength weather surveillance radar in Norman, Oklahoma. The radar receives simultaneously horizontal and vertical (SHV) electric fields and can transmit either horizontal fields or both vertical and horizontal fields. The differences between correlations obtained in this SHV mode and correlations measured in alternate H, V mode are reviewed; a histogram of differential phase obtained in Florida using alternate H, V mode is also presented. Data indicate that the backscatter differential phase of clutter has a broad histogram that completely overlaps the narrow histogram of precipitation echoes. This is important as it implies that a potent discriminator for separating clutter from meteorological echoes is the texture of the differential phase. Values of the copolar cross-correlation c...

[1]  Alexander V. Ryzhkov,et al.  Considerations for Polarimetric Upgrades to Operational WSR-88D Radars , 2000 .

[2]  V. Bringi,et al.  Studies of the Polarimetric Covariance Matrix. Part II: Modeling and Polarization Errors , 2003 .

[3]  Alexander V. Ryzhkov,et al.  Interpretation of Polarimetric Radar Covariance Matrix for Meteorological Scatterers: Theoretical Analysis , 2001 .

[4]  Alexander V. Ryzhkov,et al.  THE JOINT POLARIZATION EXPERIMENT Polarimetric Rainfall Measurements and Hydrometeor Classification , 2005 .

[5]  K. Sarabandi.  Derivation of phase statistics from the Mueller matrix , 1992 .

[6]  Jerry M. Straka,et al.  Testing a Procedure for Automatic Classification of Hydrometeor Types , 2001 .

[7]  Jerry M. Straka,et al.  Bulk Hydrometeor Classification and Quantification Using Polarimetric Radar Data: Synthesis of Relations , 2000 .

[8]  J. Zyl,et al.  Unsupervised classification of scattering behavior using radar polarimetry data , 1989 .

[9]  A. Zahrai,et al.  The 10 cm wavelength polarimetric weather radar at NOAA's National Severe Storms Laboratory , 1994 .

[10]  Alexander V. Ryzhkov,et al.  Polarimetric Radar Observations and Interpretation of Co-Cross-Polar Correlation Coefficients , 2002 .

[11]  D. W. Tufts,et al.  Statistical Communication Theory , 1958 .

[12]  A. V. Ryzhkov,et al.  Preliminary Results of X-Band Polarization Radar Studies of Clouds and Precipitation , 1994 .

[13]  H. Ward.  Radar reflectivity of land and sea , 1976, Proceedings of the IEEE.

[14]  Anthony J. Illingworth,et al.  Improved Precipitation Rates and Data Quality by Using Polarimetric Measurements , 2004 .

[15]  D. Zrnic,et al.  Doppler Radar and Weather Observations , 1984 .

[16]  Narayanaswamy Balakrishnan,et al.  Polarimetric signatures in the stratiform region of a mesoscale convective system , 1993 .

[17]  Henning Skriver,et al.  Multitemporal C- and L-band polarimetric signatures of crops , 1999, IEEE Trans. Geosci. Remote. Sens..

[18]  Sergey Y. M Atrosov.  Depolarization Estimates from Linear H and V Measurements with Weather Radars Operating in Simultaneous Transmission-Simultaneous Receiving Mode , 2004 .

[19]  N. Balakrishnan,et al.  Use of Polarization to Characterize Precipitation and Discriminate Large Hail , 1990 .

[20]  Kamal Sarabandi,et al.  Polarimetric Radar Measurements Of Bare Soil Surfaces At Microwave Frequencies , 1991, [Proceedings] IGARSS'91 Remote Sensing: Global Monitoring for Earth Management.

[21]  Dusan Zrnic,et al.  Observations of insects and birds with a polarimetric radar , 1998, IEEE Trans. Geosci. Remote. Sens..

[22]  V. Chandrasekar,et al.  Polarimetric Doppler Weather Radar: Principles and Applications , 2001 .