Fig. 3From: Soliton-induced spectrally uniform ion line power enhancements at the ionospheric F region peakDistribution of altitude deviations from the F peak for the first spectra with a power ratio PR > 6 in the 48 events. The y axis shows the number of events for 20 5-km-sized bins. Positive and negative deviations represent spectral enhancements occurring respectively above and below the peak.Back to article page