改进气象雷达TITAN算法在灾害性天气预警中的应用研究

Application research on disaster weather warning based on improved TITAN algorithm of Doppler weather radar

提出一种适用于我国不同季节、经纬度和下垫面的改进气象雷达TITAN算法。建立天气雷达数据格式转换系统,将我国不同型号新一代天气雷达基数据转换成MDV格式雷达数据;按我国不同气候类型、经纬度和海陆下垫面特征,统计获取不同区域强风暴天气雷达特征指标参数阈值。利用云贵高原和海南地区不同下垫面的两次典型超级单体强风暴天气雷达实况数据与改进的TITAN算法进行实验对比分析。分析结果指出,采用改进TITAN算法识别、跟踪和预测0.5~1 h后的强风暴天气误差较小,可信度较高,有助于识别预警灾害性天气和人影指挥作业。

This research proposed a kind of improved weather radar TITAN algorithm for different seasons,latitude and longitude and underlying surface in China.The weather radar data format conversion system is established in order to convert various Doppler weather radar base data in China to the MDV radar data format.The parameters thresh- old of radar characteristics of strong storm weather in different areas are counted based on different climate types, latitude and longitude and characteristics of land and sea. We make comparative experimental analysis between two typical weather radar base data of super-cell storm in Yunnan and Hainan regions and the improved weather radar TITAN algorithm. The results indicate that the error of using the improved TITAN algorithm to identify, track and predict strong storm weather after 30 minutes to 1 hour is relatively small,which has a higher credibility and could be conducive to identify disaster weather and commanding operation of weather modification.