1.1该表提供了标准的紫外光谱辐照度分布，该分布可作为在应用于室内暴露试验时判断人造紫外光源的指南。该表为与自然阳光紫外线光谱数据进行比较提供了参考。提供波长范围为280至400 nm的紫外线参考光谱辐照度。所选波长区域由320至400 nm的UV-A光谱区域和280至320 nm的UV-B区域组成。 1.2该表定义了单个紫外线太阳光谱辐照度分布: 1.2.1对于气团1，在280至400 nm的波长范围内，入射到面向太阳的37个倾斜表面上的半球形紫外线太阳光谱辐照度（由直接和漫反射组件组成）。 05，在1976年美国标准大气廓线（USSA 1976）海拔2 km（2000 m）处，臭氧含量除外，其规定为0.30大气厘米（atm-cm）等效厚度。 1.3这些表中包含的数据是使用Gueymard开发的SMARTS2 2.9.2版大气传输模型生成的 (1,2) . 1.4选择的气候、大气和几何参数反映了在典型晴空条件下提供真实最大紫外线照射的条件。 1.5用于生成标准光谱的SMARTS2模型（作为本标准的附件）的可用性允许用户评估相对于此处指定光谱的光谱差异。

1.1 The table provides a standard ultraviolet spectral irradiance distribution that maybe employed as a guide against which manufactured ultraviolet light sources may be judged when applied to indoor exposure testing. The table provides a reference for comparison with natural sunlight ultraviolet spectral data. The ultraviolet reference spectral irradiance is providded for the wavelength range from 280 to 400 nm. The wavelength region selected is comprised of the UV-A spectral region from 320 to 400 nm and the UV-B region from 280 to 320 nm. 1.2 The table defines a single ultraviolet solar spectral irradiance distribution: 1.2.1 Total hemispherical ultraviolet solar spectral irradiance (consisting of combined direct and diffuse components) incident on a sun-facing, 37 tilted surface in the wavelength region from 280 to 400 nm for air mass 1.05, at an elevation of 2 km (2000 m) above sea level for the United States Standard Atmosphere profile for 1976 (USSA 1976), excepting for the ozone content which is specified as 0.30 atmosphere-centimeters (atm-cm) equivalent thichkness. 1.3 The data contained in these tables were generated using the SMARTS2 Version 2.9.2 atmospheric transmission model developed by Gueymard (1,2) . 1.4 The climatic, atmospheric and geometric parameters selected reflect the conditions to provide a realistic maximum ultraviolet exposure under representative clear sky conditions. 1.5 The availability of the SMARTS2 model (as an adjunct to this standard) used to generate the standard spectra allows users to evaluate spectral differences relative to the spectra specified here.