[MSNoise] source of coherence calculation

[Alexander Yates]

Hi Run,

I am pretty sure that the coherence in MSNoise is computed as described by Clarke et al. (2011) (https://doi.org/10.1111/j.1365-246X.2011.05074.x). It is defined in Appendix A of the paper.

Not sure on the details exactly on how matlab and scipy differ from this, but I've certainly seen the definition given by Clarke et al. elsewhere also.

Perhaps this is helpful to you?

Cheers,
Alec

PhD Student at ISTerre,
France



----- Mail original -----
De: "Kohtaro R. Araragi" <kararagi at eri.u-tokyo.ac.jp>
À: msnoise at mailman-as.oma.be, "Thomas Lecocq" <thomas.lecocq at seismology.be>
Envoyé: Jeudi 21 Juillet 2022 15:27:24
Objet: [MSNoise] source of coherence calculation

Dear Thomas (c.c. MSNoise community),


I'm Run, a former student of ERI who has been working with Florent, 
(Yosuke) Aoki-san, (Takao ) Ohminato-san. I hope you are doing well.


I am recently checking the processing of MWCS method and noticed that 
the algorithm of coherence ( functions of "smooth(x, window='boxcar', 
half_win=3):" and "getCoherence(dcs, ds1, ds2)" at move2obspy.py) is 
different from matlab (mscohere) or python (scipy.signal.coherence) 
though it works very well.

Could you let me know if there were some original papers or documents 
that explain the background about it? I appreciate if someone tell me 
about relevant information how to obtain the coherence in detail.


Thanks in advance,

Run

-- 
____________________________________________________
K. Run Araragi
Research student/M.Sc.
Earthquake Research Institute
University of Tokyo
1-1-1 Yayoi, Bunkyo-ku
Tokyo, Japan 113-0032

Skype name: kalessinlord
Tel: 81-3-5841-5697
Cel: 81-90-1166-3091
____________________________________________________

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