平均订正因子法校准天气雷达测定区域降水量的试验

THE TEST OF CALIBRATING THE WEATHER RADAR MEASURED PRECIPITATION BY MEAN EMENDATION FACTOR METHOD

本文在平均校准法的基础上,提出了校准天气雷达测定区域降水量的另一种方法——平均订正因子法,并用该方法校准雷达测定了四次局地雷暴雨天气的区域降水量。经与同时次雨量计网测得的雨量相比较,其相对误差由未校准时的50％～165％下降到30％～44％,比平均校准法减小了2％～15％。这表明,用平均订正因子法校准天气雷达测定降水是有效的,对于上述类型降水,其校准精度高于平均校准法。

On the basis of mean emendation method, this puts forward another method of calibrating regional pricipitation measured by weather radar-mean emendation factor method, and calibrating radar by this method, we have measured the pricipitation of local storm weather four times. Comparing by the pricipitation measured by the raingauge net* the relative errors droped from uncalibrated 50%-165% to 30%-44%', reduced 2%-15%, compared by mean emending method. It shows. that calibrating the radar measured pricipitation using the mean emendation factor method is effective, the caiibrating precision is better than mean remend method for the discussed type of pricipitation.