Distribution of SED pixel intensities of storm F with a bin size of 0.4 dB. The gray bars represent all SED pixels, and the black bars show the distribution of pixels from a single SED episode, the closest approach episode of 10 May 2008 before noon. For a better visibility the black bars of the single episode are magnified by a factor of 10 with respect to the scale on the ordinate. The dashed fitted curve is given by the two-term exponential model of Eq. (4).