Appearance frequency distributions of meteoroids around Earth up to an altitude of 2000 km (upper panel) and up to 36 000 km (lower panel). Black and red lines denote the sporadic and the stream meteoroids, respectively. Solid lines correspond to the frequencies based on only the validated flashes, while dashed lines are those that are based on the validated and suspected flashes. Vertical solid lines indicate the boundaries of the mesosphere, LEO, MEO, and GEO zones. Vertical dashed lines in the lower panel indicate satellite crowed orbit zones.