Fig. 7
The electromagnetic field intensity (5 kHz bandwidth centered on 10 kHz) from Veneras 11–13 (Ksanfomality et al. 1982,1983) averaged over 20 s intervals, plotted on a common scale which shows the dramatically different character of the Venera 11 profile with the 30–15 km altitude range (about 20% of the descent duration) having several times higher intensity than the rest. Previous presentations have tended to rescale each profile, de-emphasizing this difference