用变分方法校准数字化天气雷达测定区域降水量基本原理和精度  

Principle and Accuracy of Adjusting the Area Precipitation from Digital Weather Radar through Variational Method

作　　者：张培昌[1] 戴铁丕[1] 傅德胜[1] 伍志芳 

机构地区：[1]南京气象学院,南京210044 [2]新疆气象科学研究所

出　　处：《大气科学》1992年第2期248-256,共9页Chinese Journal of Atmospheric Sciences

基　　金：75-09-02-28-03 75国家重点攻关课题资助

摘　　要：本文用变分方法校准雷达估算的降水强度和区域降水量,结果表明:经变分校准后,不但能使雷达探测到的结果与雨量计观测到的结果比较接近,而且还能保留没有雨量计站的地方雷达探测到的降水强度变化,其平均相对误差约为20％.This article deals with a variational method through which the rainfall intensity and the area precipitation detected by a weather radar are adjusted. The result shows that not only the radar measurement agrees with the measurement of rain gauges but also the radar-detected rainfall distribution pattern between the rainfall stations can be retained after the adjustment. The absolute value of the relative errors is on average about 20%.

关 键 词：降水量 降水强度 雷达 数字化 校准 

分 类 号：P458.121[天文地球—大气科学及气象学]