可业务化应用的L波段探空系统高空风改进算法  

An Improved Upper-air Wind Measurement Algorithm for L-band Radiosonde Sounding System

作　　者：陈磊[1,2,3] 卞建春[1] 刘毅[1] 石鹏飞 韩燕 唐敬 CHEN Lei;BIAN Jianchun;LIU Yi;SHI Pengfei;HAN Yan;TANG Jing(Key Laboratory of Middle Atmosphere and Global Environment observation,Institute of Atmsopheric Physics,Chinese Academy of Sciences,Beijing 100029,China;University of Chinese Academy of Sciences,Beijing 100049,China;Unit of 63655 of the Chinese People’s Liberation Army,Urumqi 841700,China)

机构地区：[1]中国科学院大气物理研究所中层大气和全球环境探测重点实验室 [2]中国科学院大学 [3]解放军63655部队

出　　处：《沙漠与绿洲气象》2017年第1期22-27,共6页Desert and Oasis Meteorology

基　　金：国家863项目(2015AA7054034)

摘　　要：为进一步挖掘L波段高空气象探测业务系统原始资料潜力、优化改进现行测风业务算法,本文基于新疆博斯腾湖东岸L波段系统机动站累积的2 a探空原始资料,提出了可业务化运行的高空风改进算法。该算法首先对雷达原始秒点坐标进行严格的质量控制,采用低通滤波、加权最小二乘法、线性补缺等方法去除探空仪摆动、雷达测量误差等对秒点坐标造成的扰动;然后采用逐秒点坐标滑动计算矢量平均风,通过与同球施放的GPS探空做比对分析得出,在全程使用50~60 s计算时间窗口或前50 min使用30~40 s时间窗口、50 min以后使用50~60 s时间窗口条件下,雷达矢量平均风廓线与GPS矢量平均风廓线吻合较好;规定高度层风和固定垂直分辨率高度层风采用查找表方法确定,其结果不仅能在风场结构上与现行业务算法一致,同时能呈现出明显的风层中小尺度扰动信息。In order to further mining raw-data potential of L-band radiosonde sounding system andimprove current upper-air wind measurement operational algorithm,based on the two years ofsounding data obtained by the L-band radiosonde sounding system in Xinjiang Bosteng lake area,an improved upper-air wind measurement algorithm could be used in routine operation is presented.Firstly,itrun a strict quality control procedure on original second-ordered coordinate data,usinglow-pass filter,weighted least squares and linear compensation methods to remove coordinate datadisturbance caused by radiosounder swinging,radar measurement error and atmospheric turbulence.Then,it adopt the vector average wind calculation method in certain time-window second by secondto obtain second-ordered wind speed/direction.Through comparative analysis with same-balloonGPS sounding,the radar sounding wind-profile is in better agreement with GPS when using50~60stime-window whole process,or using the30~40s time-window before the50min and50~60stime-window after the50min;fixed vertical resolution altitude wind-profile is obtained from thelookout-table method using second-ordered wind-profile,the result is not only in agreement withcurrent operational algorithm on wind-field structure,but also can provide obvious wind-field fluctuation information.

关 键 词：L波段探空系统 测风算法 业务流程 

分 类 号：P412[天文地球—大气科学及气象学]