Plateau Meteorology

Plateau Meteorology >

2016 , Vol. 35 >Issue 1: 231 - 243

DOI: https://doi.org/10.7522/j.issn.1000-0534.2014.00131

C-Band Polarization Radar Data Preprocessing and Its Application to Rainfall Estimation

  • WEI Qing ,
  • HU Zhiqun ,
  • LIU Liping ,
  • WU Linlin
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  • State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China;2. Chengdu University of Information Technology, Chengdu 610225, China;3. Anhui Weather Modification Office, Hefei 230031, China

Received date: 2014-05-05

  Online published: 2016-02-28

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Abstract

Radar data processing method and qualitative precipitation estimation are tested based on the data observed at Dingyuan,Anhui Province in June and July 2013 with a C-band polarization radar(PCDJ) which is one of the instrument of Anhui Weather Modification Office.After filtered by median filter and wavelet analysis method respectively,the differential propagation phase shift ΦDP data filtered by wavelet analysis can significantly improve ΦDP data quality.The specific differential propagation phase shift KDP is estimated from ΦDP by least-square fitting approaches in 1.5~4.0 km resolution.ΦDP data filtered by wavelet analysis is more continuous and smooth.And the result of ΦDP data filtered by wavelet analysis applied to precipitation estimation is better.The attenuation of ZH in rain area is corrected by KDP which is estimated from ΦDP data filtered by wavelet analysis,and the corrected ZH values of PCDJ radar are smaller than SA's.Combining with hourly rainfall gauge,the comparison analysis were made between the rain rates estimated from PCDJ and SA.The results suggest that the rain rates estimated from i>R(ZH,KDP) are more accurate than those from i>R(ZH) when the rain rates are greater than 5 mm·h-1,but less accurate when the rain rates are smaller than 5 mm·h-1.In addition,SA radar rain rates estimated from i>R(ZH) is more accurate than PCDJ radar's.Also,PCDJ radar rain rates estimated from i>R(ZH,KDP) can further improve the accuracy than SA radar when the rain rates are greater than 5 mm·h-1.

Key words： C-band polarization; Data optimization; Specific differentia; Rainfall estimation

Cite this article

WEI Qing , HU Zhiqun , LIU Liping , WU Linlin . C-Band Polarization Radar Data Preprocessing and Its Application to Rainfall Estimation[J]. Plateau Meteorology, 2016 , 35(1) : 231 -243 . DOI: 10.7522/j.issn.1000-0534.2014.00131

References

[1]Atlas D,Ulbrich C W.1974.The physical basis for attenuation-rainfall relationships and the measurement of rainfall parameters by combined attenuation and radar methods[J].J Rech Atmos,8:275-298.
[2]Bent A E.1943.Radar Echoes from Atmospheric Phenomena[M].Cambridge:Massachusetts Institute of Technology,Radiation Laboratory,173:10.
[3]Bringi V N,Chandrasekar V,Balakrishnan N,et al.1990.An examination of propagation effects in rainfall on radar measurements at microwave frequencies[J].J Atmos Oceanic Technol,7:829-840.
[4]Golestani Y,Chandrasekar V,Bringi V N.1989.Intercomparison of Multiparameter Radar Measurements[C].Preprints,24th Conf on Radar Meteorology,Tallahassee FL:Amer Meteor Soc,309-314.
[5]Gorgucci E,Scarchilli G,Chandrasekar V.1999.Specific differential phase estimation in the presence of nonuniform rainfall medium along the path[J].J Atmos Oceanic Technol,16(11):1690-1697.
[6]Hubbert J,Bringi V N.1995.An iterative filtering technique for the analysis of copolar differential phase and dual-frequency radar measurements[J].J Atmos Ocean Technol,12(3):643-648.
[7]Hubbert J,Chandrasekar V,Bringi V N,et al.1993.Processing and interpretation of coherent dual-polarized radar measurements[J].J Atmos Ocean Technol,10(2):155-164.
[8]Marshall J S,Palmer W M.1948.The distribution of raindrops with size[J].J Meteor,5(4):165-166.
[9]Ryzhkov A V,Zrnic D S.1996.Assessment of rainfall measurement that uses specific differential phase[J].J Appl Meteor,35(11):2080-2090.
[10]Seliga T A,Bringi V N.1976.Potential use of radar differential reflectivity measurements at orthogonal polarizations for measuring precipitation[J].J Appl Meteor,15(1):69-76.
[11]Wang Y,Chandrasekar V.2009.Algorithm for estimation of the specific differential phase[J].J Atmos Oceanic Technol,26(12):2565-2578.
[12]Zrnic D S,Ryzhkov A V.1996.Advantages of rain measurements using specific differential phase[J].J Atmos Oceanic Technol,13(2):454-464.
[13]曹俊武,胡志群,陈晓辉,等.2011.影响双线偏振雷达相位探测精度的分析[J].高原气象,30(3):817-822.Cao Junwu,Hu Zhiqun,Chen Xiaohui,et al.2011.Accuracy analysis of dual-linear polarization signal-process measurement[J].Plateau Meteor,30(3):817-822.
[14]楚荣忠,贾伟.1999.双线偏振雷达的降水估测Ⅰ:排序配对逼近法[J].高原气象,18(1):97-108.Chu Rongzhong,Jia Wei.1999.Precipitation estimate using dual linear polarization radar Ⅰ:ASP method[J].Plateau Meteor,18(1):97-108.
[15]楚荣忠,李小平.1999.双线偏振雷达降水估测Ⅱ:误差分类分析[J].高原气象,18(1):109-117.Chu Rongzhong,Li Xiaoping.1999.Precipitation estimate using dual linear polarization radar Ⅱ:Classified Analysis of error[J].Plateau Meteor,18(1):109-117.
[16]杜牧云,刘黎平,胡志群.2013.双线偏振雷达差分反射率因子系统误差订正[J].高原气象,32(4):1174-1185.Du Muyun,Liu Liping,Hu Zhiqun.2013.System bias calibration of differential reflectivity for dual linear polarization radar[J].Plateau Meteor,32(4):1174-1185.DOI:10.7522/j.issn.1000-0534.2012.00084.
[17]何宇翔,吕达仁,肖辉,等.2009.X波段双线极化雷达反射率的衰减订正[J].大气科学,33(5):1027-1037.He Yuxiang,Lü Daren,Xiao hui,et al.2009.Attenuation correction of radar differential reflectivity for X-band dual polarization radar[J].Chinese J Atmos Sci,33(5):1027-1037.
[18]胡方超,张培昌,王振会.2013.天线仰角对双线偏振雷达探测ZDR值的影响[J].高原气象,32(6):1658-1664.Hu Fangchao,Zhang Peichang,Wang Zhenhui.2013.Effects of elevation angles on the ZDR detected by dual linear polarization dadar[J].Plateau Meteor,32(6):1658-1664.DOI:10.7522/j.issn.1000-0534.2012.00148.
[19]胡志群,刘黎平,楚荣忠,等.2008.X波段双线偏振雷达不同衰减订正方法对比及其对降水估测影响研究[J].气象学报,66(2):251-261.Hu Zhiqun,Liu Liping,Chu Rongzhong,et al.2008.Comparison of different attenuation correction methods and their affects on estimated rainfall using X-band dual linear polarimetric radar[J].Acta Meteor Sinica,66(2):251-261.
[20]胡志群,刘黎平,吴林林.2014.C波段偏振雷达几种系统误差标定方法对比分析[J].高原气象,33(1):221-231.Hu Zhiqun,Liu Liping,Wu Linlin.2014.Comparison among several system biases calibration methods on C-band polarimetric radar[J].Plateau Meteor,33(1):221-231.DOI:10.7522/j.issn.1000-0534.2013.00134.
[21]刘黎平,葛润生,张沛源.2002.双线偏振多普勒天气雷达遥测降水强度和液态含水量的方法和精度研究[J].大气科学,26(5):709-719.Liu Liping,Ge Runsheng,Zhang Peiyuan.2002.A study of method and accuracy of rainfall rate and liquid water content measurements by dual linear polarization Doppler radar[J].Chinese J Atmos Sci,26(5):709-719.
[22]刘黎平,徐宝祥.1992.双线偏振雷达雨区衰减订正问题的模拟计算与讨论[J].高原气象,11(3):235-240.Liu Liping,Xu Baoxiang.1992.Simulation and discussion of correcting microwave attenuation within rain area for dual linear polarization radar[J].Plateau Meteor,11(3):235-240.
[23]马建立,苏德斌,金永利,等.2012.X波段双线性偏振雷达电磁波衰减对冰雹识别的影响[J].高原气象,31(3):825-835.Ma Jianli,Su Debin,Jin Yongli,et al.2012.The impact of attenuation of X-band dual linear polarimetric radar on hail recognition[J].Plateau Meteor,31(3):825-835.
[24]史朝,何建新,李学华,等.2013.X波段天气雷达地物回波的双偏振参量特征分析及应用[J].高原气象,32(5):1478-1484.Shi Zhao,He Jianxin,Li Xuehua,et al.2013.Analysis and application of dual-polarization parameters about ground clutter from X-band weather radar[J].Plateau Meteor,32(5):1478-1484.DOI:10.7522/j.issn.1000-0534.2012.00137.
[25]王建林,刘黎平,曹俊武.2005.双线偏振多普勒雷达估算降水方法的比较研究[J].气象,31(8):25-41.Wang Jianlin,Liu Liping,Cao Junwu.2005.A comparison of methods of rainfall rate measurements by dual linear polarization doppler radar[J].Meteor Mon,31(8):25-41.
[26]吴林林,刘黎平,袁野,等.2015.C波段车载双偏振雷达 ZDR资料处理方法研究[J].高原气象,34(1):279-287.Wu Linlin,Liu Liping,Yuan Ye,et al.2015.Study on ZDR processing algorithm of C-Band mobile dual polarization radar[J].Plateau Meteor,34(1):279-287.DOI:10.7522/j.issn.1000-0534.2013.00102.
[27]肖艳娇,王斌,陈晓辉,等.2012.移动X波段双线偏振多普勒天气雷达差分相位数据质量控制[J].高原气象,31(1):223-230.Xiao Yanjiao,Wang Bin,Chen Xiaohui,et al.2012.Differential phase data quality control of mobile X-band dual-polarimetric Doppler weather radar[J].Plateau Meteor,31(1):223-230.
[28]张培昌,杜秉玉,戴铁丕.2001.雷达气象学[M].北京:气象出版社,178.Zhang Peichang,Du Bingyu,Dai Tiepei.2001.Radar Meteorology[M].Beijing:China Meteorological Press,178.
[29]赵果,楚荣忠,张彤,等.2011.偏振多普勒雷达定量测量降雨精度的改进[J].高原气象,30(2):498-507.Zhao Guo,Chu Rongzhong,Zhang Tong,et al.2011.An improvement of polarimetric radar rainfall estimates[J].Plateau Meteor,30(2):498-507.
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