Morphological Methods for Estimating the Relative Delay of Infrasound Signals in the Form of N- and U-Waves

Abstract

The present paper investigates the accuracy of estimating the relative time delay for model infrasound signals of complex shape, represented as a combination of N- and U-waves typical of recordings of natural events (explosions, eruptions, meteors). To solve this problem, it is proposed to apply morphological methods of signal analysis developed at the Department of Mathematical Modelling and Computer Science of the Faculty of Physics of Lomonosov Moscow State University. These methods make it possible to work effectively with the waveform, which is crucial for the correct determination of the time parameters of non-stationary waves. Brief descriptions of the morphological approach and the features of N-/U-waves are given, as well as the results of a computer experiment on estimating the relative delay of model signals using morphological methods. The experiment demonstrates the operability and potential advantages of the proposed methods in the presence of interference and distortions of the waveform. The obtained results can be used to improve the accuracy and reliability of systems for locating infrasound sources in the field of geophysics and atmospheric physics.