Wavenumber Filtering
Wavenumber Filtering : A technique for processing recordings from an array of seismometers to enhance signals with a given range of angular frequency ? and of the radial component kR of the wavenumber vector k in the horizontal (azimuthal) direction of wave propagation. The wave field is then assumed to be composed of plane harmonic waves with frequency ? propagating along the surface with horizontal slowness vector kR/?. The reciprocal of the absolute value of kR/? is the apparent velocity vapp. See Chapter 9 of this Manual, and Douglas (2002)
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