激光与光电子学进展, 2020, 57 (3): 033501, 网络出版: 2020-02-17  

区域太阳高度角平均偏差的统计特征规律 下载: 1032次

Statistical Characteristic Law of Average Deviation of Solar Elevation in Different Regions
张行清 1,2,**庞芳 3,*卢伟萍 1,2谭孟祥 1,2
作者单位
1 国家卫星气象中心遥感应用试验基地, 广西 南宁 530022
2 广西壮族自治区气象科学研究所, 广西 南宁 530022
3 广西壮族自治区气象台, 广西 南宁 530022
摘要
为把握好地球系统模拟、遥感地物反演的太阳辐射数据精度,需要探讨尺度效应引起的太阳高度角的区域代表性问题以及确定太阳高度角数据密度的方法。设计区域太阳高度角平均偏差计算方法,建立分布合理的样本数据,根据计算方法选择样本数据,计算区域太阳高度角平均偏差,按制定的统计方法归纳其规律特征。统计得到,区域太阳高度角平均偏差与区域直径为实质性相关,为正相关近线性关系,线性系数随着区域直径的增大而略微减小,当区域直径小于3000 km时,线性系数为(1.8969~1.9084)×10 -3 (°)·km -1,同宽区域的太阳高度角平均偏差的离散程度极小。结果表明:统计规律具有简洁性、高稳定性及高可靠性,为地域性或全球性地球系统模拟、地物反演中太阳高度角数据密度的确定提供科学依据。
Abstract
In order to grasp the accuracy of solar radiation data from earth system simulation and remote sensing ground object inversion, it is necessary to discuss the regional representation of solar elevation caused by scale effect and the method for determining the data density of solar elevation. The calculation method of average deviation of regional solar elevation is designed and the sample data with reasonable distribution is established. The average deviation of regional solar elevation is calculated with the sample data selected according to the calculation method. Its regular characteristics are summarized according to the established statistical method. According to the statistics, the average deviation of regional solar elevation is substantially correlated with the regional diameter, they are nearly linear relation of positive correlation, and the linear coefficient slightly decreases with the increase of the regional diameter. When the regional diameter is less than 3000 km, the deviation has positive linear relation with the regional diameter with the coefficient of (1.8969-1.9084)×10 -3 (°)·km -1. The dispersion degree of the average deviation of solar elevation in the region with the same width is very small. The results show that the statistical law is simple, with high stability and high reliability. The scientific evidence is provided for determining the data density of solar elevation in the regional or global earth system simulation and ground object inversion.

张行清, 庞芳, 卢伟萍, 谭孟祥. 区域太阳高度角平均偏差的统计特征规律[J]. 激光与光电子学进展, 2020, 57(3): 033501. Xingqing Zhang, Fang Pang, Weiping Lu, Mengxiang Tan. Statistical Characteristic Law of Average Deviation of Solar Elevation in Different Regions[J]. Laser & Optoelectronics Progress, 2020, 57(3): 033501.

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