L波段高空气象探测系统测风算法改进探讨

对我国高空气象观测业务中的平均风计算方法及其存在的问题进行了分析和探讨,提出了完全采用矢量平均风算法来求取高空规定层风的业务流程改进方案;用锡林浩特站和阳江站同球施放的RS92GPS探空仪与L波段雷达-GTS1探空仪的对比观测数据集,对20~200s时间窗口下的各种矢量平均风计算方案及其规定风层计算结果进行了分析比对,提出未来改进的L波段高空气象观测系统可以测试使用时间窗口为30~45s的矢量平均风、使得计算风层达到每150~350m高程一个,以便进一步提高与GPS测风结果的一致性、更好地满足预报服务部门对高空风垂直分辨率的应用需求。

Improvement of Wind Measurement Algorithm for L Band Upper Air Meteorological Sounding System

The wind measurement algorithm of the L Band Upper Air Meteorological Sounding System is discussed and the existing problems are analyzed. An improvement scheme for calculating upper air winds, which uses the average wind vector algorithm, is presented. Using the contrast observation data set from a ball launching simultaneously RS92 GPS radiosonde and the L band radar-GTS1 radiosonde at Xilinhaote and Yangjiang stations, comparison and analysis are conducted of the regular wind layer calculation results with a variety of average wind vector calculation schemes in the time window of 2 s to 200 s. Based on this analysis, it is suggested that in the time window of 30 s to 45 s, the average wind vector should be used for the future improvement of upper air winds measured by the operational L band radar and radiosonde sounding system, which can set a measurement wind layer every 150 to 350 m elevation, to further improve the consistency with the results of GPS measuring winds.