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Comparison of the Observation Capability of an x-band phased-array radar with an x-band Doppler radar and S-band Operational radar

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Advances in Atmospheric Sciences 2014年第4期31卷 814-824页

作者： WU Chong LIU Liping State Key Laboratory of Severe Weather Chinese Academy of Meteorological Science Chengdu University of Information Technology

An x-band phased-array meteorological radar （xPAR） was developed in China and will be installed in an airplane to observe precipitation systems for research *** order to examine the observational capability of the xPAR and to test the operating mode and calibration before installation in the airplane,a mobile x-band Doppler radar （xDR） and xPAR were installed at the same site to observe convective precipitation *** S-band operational radar （SA） data were also collected to examine the reflectivity bias of *** algorithm for quantitative analysis of reflectivity and velocity differences and radar sensitivity of xPAR is *** reflectivity and velocity biases of xPAR are examined with SA and *** sensitivities,the horizontal and vertical structures of reflectivity by the three radars are compared and *** results indicated that while the xPRA with different operating modes can capture the main characteristic of 3D structures of precipitation,and the averaged reflectivity differences between xPAR and xDR,and xDR and SA,were 0.4 dB and 6.6 dB on 13 July and-4.5 dB and 5.1 dB on 2 August 2012,*** minimum observed reflectivities at a range of 50 km for xPAR,xDR and SA were about 15.4 dBZ,13.5 dBZ and-3.5 dBZ,*** bias of velocity between xPAR and xDR was *** study provides a possible method for the quantitative comparison of the xPAR data,as well as the sensitivity of reflectivity,calibration,gain and bias introduced by pulse compression.

关键词： x-band planar phased-array radar observational capability field experiment quantitative analysis

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