基于ViewGIS的太阳辐射精度检验与误差分析

通过本研究为农林业相关部门应用ViewGIS3.0计算当地太阳直接辐射强度及其分布规律提供科学依据。采用实地观测山西省平鲁区黄土丘陵沟壑区、丘陵缓坡风沙区、土石山区、冲积平原区4种不同立地类型的太阳直接辐射值与ViewGIS3.0模拟得出的直接辐射值进行对比分析。研究表明，ViewGIS3.0对太阳直接辐射瞬时值模拟精度在90%以上；晴空条件下日累积辐射量的模拟误差在5%以内，少云条件下其误差在10%以内；云层是使误差增大的主要原因。证明该软件对于计算一天及数天以上的太阳直接辐射量，完全可以达到满意结果，具有重要的实用价值。

Precision Inspection and Error Analysis of Solar Radiation Based on ViewGIS

This study provides scientific basis for relevant departments of agriculture and forestry apply ViewGIS3.0 to calculate the local direct solar radiation intensity and regularity of distribution.Through the on-the-spot observation of Shanxi pinglu area loess hilly region,hilly gentle slope aeolian area,soil stone mountain area and alluvial plain of four different site types of direct solar radiation values,which contrasts analysis with simulation obtains direct radiation simulation values by ViewGIS.Research showed：ViewGIS3.0 was over 90% of the simulation accuracy for direct solar radiation instant values;the simulation error of daily cumulative radiation was less than 5% in the condition of clear sky,the error was less than 10% in the condition of partly cloudy;the clouds were the main reasons to make the error increasing.It proved that this software can completely achieved satisfactory results to calculate one day or over several days of direct solar radiation,and that had important practical values.