SHORT COMMUNICATION: Alternative representation of degradation corrections to space-based measurements of total solar irradiance

Abstract

Degradation corrections to solar irradiance measurements in space along with a postulated 'hyperbolic' fitting formula were recently reported (Fröhlich 2003 Metrologia 40 S60-5). A simpler, alternative formula based on broadband synchrotron exposure experiments on polymeric mixtures is presented. The alternative formula is shown to be similar to the hyperbolic function in the high photon dose limit. These results complement and reinforce the physical validity of the previously reported degradation corrections.