To get the measured data of the diffuse radiant exposure on a horizontal surface, the fitting method suggested by Liu and Jordan, which is used for estimating the diffuse radiant exposure by using the total radiant exposure on a horizontal, is amended. Based on the analysis of 9 years actual measured solar radiant exposure data of Guangzhou, the modified equation is developed for the estimation purpose by the curve fitting. Through the accuracy analysis of the results from different curve fitting methods and parameters, this amended method is verified and extended to be applied to a wide range.%为了获得水平面太阳辐射中散射辐射量的实测数据,以广州地区的多年太阳辐射量实测数据为研究对象,在Liu＆Jordan的辐射量转换计算分析方法基础上,采用实测数据分析和数值拟合方法,拟合完成了适合广州地区的基于水平面太阳总辐射量估算散射辐射量的方法;针对不同拟合结果进行了相应的精度分析,得出较好的拟合方式与参数.
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