Abstract
Three examples are provided of the use of multiple generalized Morse wavelets for polarization analysis of three–component recordings where phase relationships between components of the signal are transient. The example three–component signals are (i) synthetic, (ii) the radial, transverse and vertical components of an earthquake, and (iii) the radial, transverse and normal components of the solar magnetic field measured by the Ulysses spacecraft upstream of an interplanetary shock. Working in the scale–time plane ( a,b ), the multiple–wavelet approach detects coherent motion with elliptical polarization in all three cases. Our graphical presentations fully take into account restrictions imposed by two factors: the minimum usable scale, and wraparound effects caused by Fourier transform computations, and consequently a maximum usable scale.
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Schedule a callMore From: Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences
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