The Error Wind Data Processing Based on Radial Power Spectrum of Wind Profiler Radar

Chen Haojun; Huang Xingyou; Sun Jing; Sun Juan; Yin Chunguang; Zheng Jie; Wang Qindian; Xue Hao

doi:10.11898/1001-7313.20150408

Vol.26, NO.4, 2015

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Article Navigation > Journal of Applied Meteorological Science > 2015 > 26(4): 460-471

Chen Haojun, Huang Xingyou, Sun Jing, et al. The error wind data processing based on radial power spectrum of wind profiler radar. J Appl Meteor Sci, 2015, 26(4): 460-471. DOI: 10.11898/1001-7313.20150408.

Citation:

Chen Haojun, Huang Xingyou, Sun Jing, et al. The error wind data processing based on radial power spectrum of wind profiler radar. J Appl Meteor Sci, 2015, 26(4): 460-471. DOI: 10.11898/1001-7313.20150408.

Citation:

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The Error Wind Data Processing Based on Radial Power Spectrum of Wind Profiler Radar

DOI: 10.11898/1001-7313.20150408

1.
Nanjing University of Information Science & Technology, Nanjing 210044)
2.
Shanghai Meteorological Information and Technical Support Center, Shanghai 200030)
3.
Shanghai Typhoon Institute of CMA, Shanghai 200030)

Received Date: 2014-11-14
Rev Recd Date: 2015-04-01
Publish Date: 2015-07-31

Abstract

Abstract

Wind profiler radar is a new generation of radio sounding wind detecting system, which takes atmospheric turbulence backscattered signal as its main detecting object. It is the most direct source to obtain high-altitude wind data in addition to the sounding data. In recent years, researches on the wind profiler radar detection are widely carried out during precipitation periods. It shows that the signal to noise ratio (SNR), the refractive index structure constant (CN2), horizontal speed, vertical wind speed and other information provided by the wind profiler could help to know the precipitation process, and clearly reflect the start time and the intensity of precipitation. The real-time high resolution radial power spectrum data provided by wind profiler radar, can not only be used to extract the wind data, but also estimate the height range of freezing layer and verify quality control performance of the wind profiler radar software. The application of wind profiler radar data is no longer limit to only study the clear air atmosphere.However, during a precipitation process, especially at the beginning of the precipitation, uneven rainfall leads to inconsistent beams in the space, and the quality control (QC) algorithm of the software used in radar cannot identify and eliminate all interference made by precipitation, leading to horizontal wind data errors.In order to improve data quality, the radial wind power spectrum data of wind profiler radar is analyzed to find out QC problems and identify and remove erroneous data. First, under the premise of fully knowing the principle of software QC method, the location and cause of software QC judgment errors are identified by progressively comparing the radial power spectrum data of the high and low mode. And then, the radial power spectrum data in problem period is reprocessed. Finally, the wind data is recalculated. Case analysis shows that the error wind data processing based on radial power spectrum of wind profiler radar could improve software QC methods and improve the quality of wind profiler radar data.
- radial power spectrum;
- high and low mode scan;
- horizontal wind data;
- quality control

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References(20)

Figures and Tables

图 1 2012年3月7日00:00—00:45上海世博园区风廓线雷达站点风羽产品图

Fig. 1 The wind product plot of Shanghai Expo wind profiler site during 0000-0045 BT on 7 Mar 2012

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图 2 2012年3月7日00:20—00:38上海天气雷达反射率因子图

Fig. 2 The Shanghai weather radar reflectivity echoes during 0020-0038 BT on 7 Mar 2012

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图 3 2012年3月7日00:15—00:40上海世博园区风廓线雷达站高模式径向功率谱

Fig. 3 The high mode radial wind power spectra plots of Shanghai Expo wind profiler site during 0015-0040 BT on 7 Mar 2012

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图 4 2012年3月7日00:15—00:40上海世博园区风廓线雷达站三波束低模式径向功率谱

Fig. 4 The low mode radial wind power spectra plots of Shanghai Expo wind profiler site during 0015-0040 BT on 7 Mar 2012

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图 5 2012年3月7日00:15—00:40上海世博园区风廓线雷达站经过质量控制后的风羽产品

Fig. 5 The wind product plot after reprocessing and inversion of Shanghai Expo wind profiler site during 0000-0045 BT on 7 Mar 2012

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图 6 上海金山站和F1赛车场站2012年3月7日00:00—00:35风廓线雷达风羽产品对比

(a) 金山站质量控制前风羽产品，(b) 金山站质量控制后风羽产品， (c) 嘉定F1赛车场站质量控制前风羽产品，(d) 嘉定F1赛车场站质量控制后风羽产品

Fig. 6 The wind product comparison chart of Jinshan and Jiading F1 racing sites wind profilers in Shanghai during 0000-0035 BT on 7 Mar 2012

(a) Jinshan site wind product before quality control, (b) Jinshan site wind product after quality control, (c) Jiading F1 racing site wind product before quality control, (d) Jiading F1 racing site wind product after quality control

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