ISO 15390:2004规定了一个模型，用于估计银河宇宙射线（GCR）在太空中对硬件以及生物和其他物体的辐射影响。ISO 15390:2004也可用于科学研究，以概括GCR通量的可用实验证据。ISO 15390:2004建立了101兆电子伏至105兆电子伏GCR粒子（地球磁层以外的近地空间中的电子、质子和Z=2至92原子核）变化的模型参数和特征。

ISO 15390:2004 specifies a model for estimating the radiation impact of galactic cosmic rays (GCR) on hardware and on biological and other objects when in space. ISO 15390:2004 can also be used in scientific research to generalize the available experimental evidence for GCR fluxes. ISO 15390:2004 establishes the model parameters and characteristics of variations in the 10¹ MeV to 10⁵ MeV GCR particles (electrons, protons, and Z = 2 to 92 nuclei in the near-Earth space beyond the Earth's magnetosphere).