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《Meteorological Science and Technology》 2018-05
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Evaluation of a L-Band Wind Speed Calculation Algorithm Based on ERA-Interim

Li Qinglei;Yuan Fang;Liao Jie;Hu Kaixi;Yang Gui;National Meteorological Information Center;Erenhot Meteorological Service,Inner Mongolia;  
Based on the high vertical-resolution position data of L-band and radiosondes,three schemes for calculating second-level wind speed are designed by selecting different time windows at different sounding heights.The calculated second-level wind speed and ERA-Interim reanalysis data are compared on different indexes:the amount of data,the average deviation(Bias),and the root mean square error(RMSE),which indicate the optimal algorithm to calculate the second wind speed.The results show that the appropriate length of time window is necessary to accurately calculate the second wind speed.Given the radar positioning system deviation,the second wind speed error will be larger if the time window is chosen too large or too small.Based on the ERA-Interim reanalysis data with good spatial and temporal consistency,this paper presents a new scheme to evaluate the L-band second-level wind speed calculation.
【Fund】: 国家气象科技创新工程“气象资料质量控制及多源数据融合与再分析”(CMAGGTD003-5);; 中国气象局观测司自动化专项“基于高频采样(秒级)观测数据质量控制试验”;; 国家气象信息中心青年科技基金课题(NMICQJ201703)资助
【CateGory Index】: P412.2
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