System spectral analysis of the ultra-wideband acoustic signal caused by the Chelyabinsk meteoroid

Abstract

The results of the system spectral analysis, which uses a set of linear and non-linear integral transforms, for the time registrations of the acoustic signal generated by the Chelyabinsk meteoroid fall and registered by the Antarctic infra-sound station were considered. The detailed time-frequency structure of the signal was analyzed. The infra-sound signal analyzed was shown to be an ultra-wideband signal with changing mean frequency.