Table 1 Statistics on the 48 spectral enhancement events showing event duration, enhancement above the thermal level, altitude of occurrence and deviation from the F region peak (positive above the peak). The four plasma parameters, based on 10 min averaged profiles preceding the events, are given at the F peak. * Value has been rounded from 1.4.

From: Soliton-induced spectrally uniform ion line power enhancements at the ionospheric F region peak