交叉相关算法在哈尔滨机场雷暴临近预报中的应用

The appliance of cross-correlation algorithm in thunderstorm nowcast at Harbin airport

本文主要介绍了哈尔滨机场雷暴预报系统之临近预报方法。该方法利用交叉相关算法,通过分析天气雷达回波在连续时次的空间最优相关,计算雷达回波移动矢量特征,根据移动矢量特征推算未来0~1 h回波状况,发布强对流天气临近预报。试验表明,该方法预测的回波状况与实际接近,这对提高强对流天气临近预报效率,保障飞行安全、提高航班正常率,具有较高的应用价值。

Introduced a nowcast method of the thunderstorm forecast system at harbin airport.The method using the cross-correlation tracking algorithm,calculates motion vectors by analyzing the optimal spatial cross-correlation of radar echo in a continuous time.According the motion vectors,it can extrapolate future 0-1h radar echo states and release the severe convective storm nowcast.It shows that,the extrapolated radar echoes were closed to the actual echoes in many cases,it is helpful to improve severe convective storm nowcast efficiency,ensure flight safety and increase flight normal rate.