ISO 21348:2007规定了确定太阳辐照度的过程，并适用于测量装置、参考光谱、经验模型、理论模型以及提供代表部分或全部太阳电磁光谱的太阳辐照度产品的太阳辐照度代理或指数。其目的是创建一种标准方法，用于指定空间系统和材料用户使用的所有太阳辐照度。

ISO 21348:2007 specifies the process for determining solar irradiances and is applicable to measurement sets, reference spectra, empirical models, theoretical models, and solar irradiance proxies or indices that provide solar irradiance products representing parts or all of the solar electromagnetic spectrum. Its purpose is to create a standard method for specifying all solar irradiances for use by space systems and materials users.