摘要
本文根据变分法和平均校准法原理,使用数字化天气雷达的回波资料和自动雨量计的雨量资料,定量分析了武汉地区1987年5月25日和5月12日两次降水过程,结果表明:平均校准方法能够减小测量误差,但降水峰值被平滑掉了。而变分校准方法,既把雷达观测到的结果造型成雨量计观测到的结果,又保留了雷达探测到的降水变化,相对误差小于10％。
Two precipitation processes, occured on 25 May and 12 May 1987 respectively in Wuhan area, were analysed quantitatively by means of variation and average adjustment technique using digital radar echo and rainfall data collected with auto-raingagues.The results have shown that the average adjustment technique, would reduce errors of radar measurement, but the peak values of precipitation were smoothed out. The variation technique is used to fit the distribution measured by radar into that by .auto-raingagues but keep the precipitation detected by radar in. its original pattern. The relative error is less than 10%.
出处
《气象》
CSCD
北大核心
1991年第10期9-14,共6页
Meteorological Monthly
