2 Jun
2020
2 Jun
'20
1:29 p.m.
Hi all,
I am new to msnoise and would appreciate a small enlightment:
According to the documentation, the "overlap" parameter in the config
menu seems to refer to overlapping between the raw seismic signal data
windows (duration 30 min by default).
However, later in the processing (cf paper), during the CCF comparison
with reference, it is said that the ref and current CCFs are sliced in
several overlapping windows.
My question is, what is the parameter controling this last overlap ?
Can it be changed ? (I did not manage to identify it in the doc)
Thanks a lot,
Best,
Thomas
2 Jun
2 Jun
1:31 p.m.
Hi Thomas,
Yes, the "overlap" parameter is for correlation windows of the "raw"
data.
The moving window cross spectrum window length is filter-dependent and
therefore configurable in the Filters tab, using mwcs_wlen & _step.
Thomas
Le 02/06/2020 à 13:29, Thomas KREMER a écrit :
Hi all,
I am new to msnoise and would appreciate a small enlightment:
According to the documentation, the "overlap" parameter in the config
menu seems to refer to overlapping between the raw seismic signal data
windows (duration 30 min by default).
However, later in the processing (cf paper), during the CCF comparison
with reference, it is said that the ref and current CCFs are sliced in
several overlapping windows.
My question is, what is the parameter controling this last overlap ?
Can it be changed ? (I did not manage to identify it in the doc)
Thanks a lot,
Best,
Thomas
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3 Jun
3 Jun
7:29 a.m.
Thanks a lot for this extremely quick answer !
Thomas
---
Thomas Kremer
Dr Applied Geophysics
ATER - UMR-CNRS 6112
+33687399467
thomas.kremer(a)univ-nantes.fr
Bureau 110, Bât 4,
Département STU,
LPG Nantes,
2 rue de la Houssinière
44322 Nantes Cedex 3
Le 2020-06-02 13:31, Thomas Lecocq a écrit :
Hi Thomas,
Yes, the "overlap" parameter is for correlation windows of the "raw"
data.
The moving window cross spectrum window length is filter-dependent and
therefore configurable in the Filters tab, using mwcs_wlen & _step.
Thomas
Le 02/06/2020 à 13:29, Thomas KREMER a écrit :
Hi all,
I am new to msnoise and would appreciate a small enlightment:
According to the documentation, the "overlap" parameter in the config
menu seems to refer to overlapping between the raw seismic signal data
windows (duration 30 min by default).
However, later in the processing (cf paper), during the CCF comparison
with reference, it is said that the ref and current CCFs are sliced in
several overlapping windows.
My question is, what is the parameter controling this last overlap ?
Can it be changed ? (I did not manage to identify it in the doc)
Thanks a lot,
Best,
Thomas
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2 Jun
2 Jun
1:43 p.m.
Salut Thomas!
Nice to see that you're starting to do some ambient seismic noise stuff !
I think that the overlap that you mean is the moving window over which the
current CCF are stacked before comparing to the reference. It's the
mov_stack parameter in the config table.
Or if you're referring to the way the MWCS is measured in small moving
windows along the waveforms, then Tom got your answer...!
Cheers,
Aurel
Le mar. 2 juin 2020 à 13:30, Thomas KREMER <Thomas.Kremer(a)univ-nantes.fr> a
écrit :
Hi all,
I am new to msnoise and would appreciate a small enlightment:
According to the documentation, the "overlap" parameter in the config
menu seems to refer to overlapping between the raw seismic signal data
windows (duration 30 min by default).
However, later in the processing (cf paper), during the CCF comparison
with reference, it is said that the ref and current CCFs are sliced in
several overlapping windows.
My question is, what is the parameter controling this last overlap ?
Can it be changed ? (I did not manage to identify it in the doc)
Thanks a lot,
Best,
Thomas
_______________________________________________
MSNoise mailing list
MSNoise(a)mailman-as.oma.be
http://mailman-as.oma.be/mailman/listinfo/msnoise
--
==========================
Postdoctoral associate
Department of Earth, Atmospheric and Planetary Sciences
Massachusetts Institute of Technology
54-526
Cambridge, MA 02139-4307
phone: 617-253-5051
e-mail: mordret(a)mit.edu
web: http://web.mit.edu/mordret/www
3 Jun
3 Jun
8:10 a.m.
Salut Aurélien!
Yes I am in the process of a little bit of diversification, which is
nice.
Thanks for your very quick answer, if I summarize correctly yours and
Tom's:
_ overlap / corr_duration => sliding window parameters for CCF
computation on "Raw data"
_ mov_stack => defines moving window when stacking together daily CCFs
(before comparison with REF CCF)
_ mwcs_wlen & _step => define overlapping windows for MWCS operations.
Does that sound right?
Thanks again!
Cheers,
Thomas
---
Thomas Kremer
Dr Applied Geophysics
ATER - UMR-CNRS 6112
+33687399467
thomas.kremer(a)univ-nantes.fr
Bureau 110, Bât 4,
Département STU,
LPG Nantes,
2 rue de la Houssinière
44322 Nantes Cedex 3
Le 2020-06-02 13:43, Aurélien Mordret a écrit :
Salut Thomas!
Nice to see that you're starting to do some ambient seismic noise stuff
!
I think that the overlap that you mean is the moving window over which
the
current CCF are stacked before comparing to the reference. It's the
mov_stack parameter in the config table.
Or if you're referring to the way the MWCS is measured in small moving
windows along the waveforms, then Tom got your answer...!
Cheers,
Aurel
Le mar. 2 juin 2020 à 13:30, Thomas KREMER
<Thomas.Kremer(a)univ-nantes.fr> a
écrit :
Hi all,
I am new to msnoise and would appreciate a small enlightment:
According to the documentation, the "overlap" parameter in the config
menu seems to refer to overlapping between the raw seismic signal data
windows (duration 30 min by default).
However, later in the processing (cf paper), during the CCF comparison
with reference, it is said that the ref and current CCFs are sliced in
several overlapping windows.
My question is, what is the parameter controling this last overlap ?
Can it be changed ? (I did not manage to identify it in the doc)
Thanks a lot,
Best,
Thomas
_______________________________________________
MSNoise mailing list
MSNoise(a)mailman-as.oma.be
http://mailman-as.oma.be/mailman/listinfo/msnoise
--
==========================
Postdoctoral associate
Department of Earth, Atmospheric and Planetary Sciences
Massachusetts Institute of Technology
54-526
Cambridge, MA 02139-4307
phone: 617-253-5051
e-mail: mordret(a)mit.edu
web: http://web.mit.edu/mordret/www
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4 comments
3 participants
participants (3)
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Aurélien Mordret -
Thomas KREMER -
Thomas Lecocq