Fig. 9
From: Statistical analysis of short-wave fadeout for extreme space weather event estimation
Absorption intensity in dB at 6.6 MHz as a function of solar flare X-ray flux and (effective) solar zenith angle obtained using a Eq. (10) from Maeda and Inuki (1972) and b Eq. (2) from Sato (1975) with a common color contour shown by the color bar at the bottom, c absorption intensity for X2-class flare and solar zenith angle of 0° as a function of signal frequency, and d highest affected frequency (HAF) as a function of solar flare X-ray flux. In c, d, the absorption intensity from Maeda and Inuki (1972) and that from Sato (1975) (considering the round trip for the HAF) are shown by green and red lines, respectively, and diamonds in d are the HAFs used in D-RAP