Meteor beginning height as a function of initial velocity for our sample. Different classes of meteoroids are shown using different symbols (AC, HT, SA, and JF following the classification of Borovicka et al. 2005). The solid line and two dashed lines mark the mean beginning of average strength meteoroids and their limits. The equation of the empirical mean line is hB = 58 × v0.156 (see Borovicka et al. 2005).
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