Fig. 2From: Discrepant responses of the global electron content to the solar cycle and solar rotation variations of EUV irradianceCross correlation coefficient versus the number of lag days of GEC27R to EUV27R. The vertical dashed line denotes the peak value of the correlation coefficient. The cross correlation analysis is for the GEC27R and EUV27R within the 81-day bin from day number 200 to 280, year 2002Back to article page