提供适当的标准光谱辐照度分布，用于确定太阳热能、光伏和其他系统组件和材料的相对性能，其中需要直射和半球形辐照度组件。给出的表格定义了直接正常辐射（5.8°视场角）的气团1.5太阳光谱辐照度，以及反照率为0.2的朝向赤道的37°倾斜平面上的半球辐射。这些表格旨在代表理想的晴空条件。

Provides an appropriate standard spectral irradiance distribution to be used in determining relative performance of solar thermal, photovoltaic, and other system components and materials where the direct and hemispherical irradiance component is desired. The tables presented define an air mass 1,5 solar spectral irradiance for the direct normal radiation - 5,8° field-of-view angle - and hemispherical radiation on an equator-facing, 37° tilted plane for an albedo of 0,2. These tables are intended to represent ideal clear sky conditions.