Fig. 7From: Discrepant responses of the global electron content to the solar cycle and solar rotation variations of EUV irradianceSeasonal variations of GEC versus EUV fitting slopes. The black line is the fitting slope for 27-day running averaged GEC and EUV, and the grey line is the fitting slope for 27-day average residual GEC and EUV. GEC and EUV are in units of 1032 electrons and 1010 photons/cm2/s, respectivelyBack to article page