The brightness of the micrometeorite (the particle) glow increases towards the track’s end.
Page 5, line 168 The authors state: “An increase in the track brightness is apparently determined by an increase in the particle charge and size due to the evaporation of metal from the surface.” The sense of this sentence is not completely clear to me. Where does the evaporation of the metal take place? It it took place on the particle surface, it should produce a reduction of its size, rather than an increase.