基于多普勒雷达探测技术的沿海地区暴雨预警方法

Rainstorm Early Warning Method in Coastal Areas Based on Doppler Radar Detection Technology

依靠单一的波束反射率特征信息,其预警结果的虚假警报比例较高,对此,提出基于多普勒雷达探测技术的沿海地区暴雨预警方法。运用多普勒雷达探测技术捕捉雷达波束反射因子后,提取隐藏的径向辐合参量,得到全面的天气雷达数据,并通过退速度模糊方法进行数据修正。以梯度下降算法为核心,对目标气象数据进行反演分析。通过TITAN算法识别暴雨云团,建立雷达回波特征匹配方法明确暴雨云团状态。最后,通过WSR-88D探测算法计算暴雨指数,实现沿海地区暴雨预警。结果表明,所提方法的虚假警报比降低了17%与24%,准确完成了沿海地区的暴雨预警。

Relying on a single beam reflectance characteristic information,the proportion of false alarm in early warning results is relatively high.Therefore,a rainstorm early warning method in coastal areas based on Doppler radar detection technology is proposed.The Doppler radar detection technology is used to capture the reflection factor of the radar beam,extract the hidden radial convergence parameters,obtain the comprehensive weather radar data,and correct the data through the regression velocity ambiguity method.Taking the gradient descent algorithm as the core,the target meteorological data are inversed and analyzed.The rainstorm cloud cluster is identified by TITAN algorithm,and the radar echo feature matching method is established to clarify the rainstorm cloud cluster state.Finally,the rainstorm index is calculated by WSR-88D detection algorithm to realize rainstorm early warning in coastal areas.The results show that the false alarm ratio of the proposed method is reduced by 17% and 24%,and the rainstorm early warning in coastal areas is completed accurately.