Radiation damage effects to spectra as measured from laboratory testing using a spectral mask approximating a G2V star for flux levels corresponding to magnitude V = 10 (left) and V = 15.7 (right). Spectra shown in black are the reference with no radiation damage, and those shown in red are the spectra after a radiation fluence of 10⁹ p⁺ cm⁻² (10 MeV equivalent energy), the calculated fluence at end-of-mission for a launch date of 2012 December (Fusero & Chassat 2011). Noise levels are not equivalent in these plots, as a different number of individual spectra are combined inthe two cases.