26 Nov
2020
26 Nov
'20
5:39 p.m.
Hi Jannik,
The bmin and bmax parameters are the bandwidth min and max of the gaussian
filters used in the FTAN algorithm.
The FTAN applies a set a gaussian filters to the seismograms with different
central frequencies. The width of the filter (in Hz) for the minimum
central frequency is bmin and vice versa for bmax. The width for the
intermediate filters increases linearly between bmin and bmax.
These parameters are equivalent to the "alpha" parameters in this paper
defining the FTAN:
Herrmann, R. B. (1973). Some aspects of band-pass filtering of surface
waves. *Bulletin of the Seismological Society of America*, *63*(2), 663-671.
Hope it helps!
Aurelien
Le jeu. 26 nov. 2020 à 17:30, Jannik Kühn <jfkuehn(a)gfz-potsdam.de> a écrit :
Hey everyone,
I'm trying to use the MSNoise-Tomo plugin to compute dispersion curves
that I can then use for a simple inversion, but I'm having a hard time
to find "good" parameters. Could someone write me what the Bmin, Bmax
parameters do and what they're called? Or refer me to a paper/article,
where I can read a bit more about the subject.
In the papers referenced I could find something regarding beamforming,
is that maybe the B parameter?
I appreciate gladly any help and references :)
Best regards,
Jannik
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