6 Oct
2016
6 Oct
'16
10:30 p.m.
Dear All,
small note here:
pleaaaase, if something is not clear in the Documentation and you think
that, after asking your questions and getting answers from the mailing
list, you have suggestions to be more accurate, precise or else, don't
hesitate to suggest changes (via github issues, pull requests or even
email), it'll be beneficial to all users!
I'm the worst person to write doc about MSNoise, because I know it too well.
Cheers
Thomas
On 06/10/2016 19:17, Esteban Chaves wrote:
Hi Ashton,
As an active user:
I highly recommend you to check the documentation:
http://msnoise.org/doc/workflow.html#module-msnoise.s03compute_cc
<http://msnoise.org/doc/workflow.html#module-msnoise.s03compute_cc>
I think the pre-processing and processing steps are well documented in the web site.
1) Yes. It is more efficient to compute the cross-correlation functions or Green’s
functions using 30-min chunks. Although you can change this feature if you will. Segments
are re-build afterwards.
2) You need to define the filters in order to compute the cross-correlations and extract
the coherent part of the ambient noise for a given frequency range. MWCS is used to
compute the moving window cross spectral analysis after the cross-correlation procedure.
3) dunno. May be Thomas can give you more info.
-Esteban J. Chaves
On Oct 6, 2016, at 5:00 AM,
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Today's Topics:
1. new user (Flinders, Ashton)
----------------------------------------------------------------------
Message: 1
Date: Wed, 5 Oct 2016 13:10:53 -0700
From: "Flinders, Ashton" <aflinders(a)usgs.gov>
To: <msnoise(a)mailman-as.oma.be>
Subject: [MSNoise] new user
Message-ID:
<CAPbWHEO7J_9dyMdKJ3SQkpGy9hG7N1M-COwgzGTpkVmy85ig5g(a)mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Hi all, long-time obspy user new MSnoise user.
I just had a couple quick questions I was hoping to get clarification on;
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MSNoise mailing list
MSNoise(a)mailman-as.oma.be
http://mailman-as.oma.be/mailman/listinfo/msnoise From the SRL article;
"Once all
waveforms are loaded in memory, the computation is done by
iteration of the station pairs, on the different components to compute and
the on the different filters for each defined window (30 minutes slices by
default)."
1) To be clear, the two time-series from a station-station pair are divided
into segments (30 minutes long, no overlap, by default), and the CC is done
on these segments? Are these segments then rebuilt into the daily CCF? Is
this segmentation purely for efficieny reasons, or is there something else
going on?
2) Why does msnoise compute_cc, not work if there is no MCWS filter defined?
3) Is there an intelligent way to search the mailing list archive?
Thanks for the help!
-ashton
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End of MSNoise Digest, Vol 31, Issue 1
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