Difference between revisions of "Ambient vibration array"
| Line 43: | Line 43: | ||
== Modified Spatial Autocorrelation (MSPAC) Toolbox == | == Modified Spatial Autocorrelation (MSPAC) Toolbox == | ||
| − | The Modified Spatial Autocorrelation (MSPAC) was introduced by <ref name="Bettig et al. (2001)">Bettig B., P.-Y. Bard, F. Sherbaum, J. Riepl, F. Cotton, C. Cornou, D. Hatzfeld, 2001. Analysis of dense array measurements using the modified spatial auto-correlation method (SPAC). Application to Grenoble area., Boletin de Geofisica Teoria e Applicata, 42, 3-4, 281-304. </ref> | + | The Modified Spatial Autocorrelation (MSPAC) was introduced by <ref name="Bettig et al. (2001)"> Bettig B., P.-Y. Bard, F. Sherbaum, J. Riepl, F. Cotton, C. Cornou, D. Hatzfeld, 2001. Analysis of dense array measurements using the modified spatial auto-correlation method (SPAC). Application to Grenoble area., Boletin de Geofisica Teoria e Applicata, 42, 3-4, 281-304. </ref> after pioneer paper of <ref Aki (1957)."> Aki, K., 1957. Space and Time Spectra of Stationary Stochastic Waves, with Special Reference to Microtremors, Bull. Earthq. Res. Inst. Tokyo, 35, 415-457. </ref> This method allows computing spatial autocorrelation coefficients for any arbitary array layouts. |
| − | + | ||
| + | === Defining rings === | ||
| Line 50: | Line 51: | ||
=== Saving results / contents of output file === | === Saving results / contents of output file === | ||
| − | === Graphical display of f-k results using | + | === Graphical display of f-k results using spac2disp === |
spac2disp | spac2disp | ||
Revision as of 10:33, 8 March 2010
Contents
Common pre-requisites for array processing - getting ready
Loading signals
View time series
Group signals
Insert / edit station coordinates
F-K Toolbox (conventional f-k)
If you have followed all steps above you should have now a set of simultaneously recorded waveforms building a group and containing coordinates for each waveform. You can view this group of waveforms in the data viewer and should get a picture like the one shown to the right.
Now you can open the conventional frequency wavenumber toolbox by pushing the plugin icon 
.
The f-k toolbox should open and is now attached to the signal viewer. No other toolbox will now open with the signals you have loaded to the signal viewer. In order to process the same data set by another tool, you have to open them in a different signal viewer window. Note also, that once you close either the f-k toolbox window or the signal viewer, there is no way to undo this action - you will have to start again by opening a new signal viewer and attaching the f-k toolbox to it. Alternatively you can drag your group directly into the f-k toolbox icon. Geopsy will automatically open a new exclusively attached signal viewer for you.
Saving results / contents of output file
Graphical display of f-k results using max2curve
High resolution frequency wavenumber Toolbox (Capon's method)
Saving results / contents of output file
Graphical display of f-k results using max2curve
Modified Spatial Autocorrelation (MSPAC) Toolbox
The Modified Spatial Autocorrelation (MSPAC) was introduced by [1] after pioneer paper of Cite error: Invalid <ref> tag;
invalid names, e.g. too many This method allows computing spatial autocorrelation coefficients for any arbitary array layouts.
Defining rings
Saving results / contents of output file
Graphical display of f-k results using spac2disp
spac2disp
References
- ↑ Bettig B., P.-Y. Bard, F. Sherbaum, J. Riepl, F. Cotton, C. Cornou, D. Hatzfeld, 2001. Analysis of dense array measurements using the modified spatial auto-correlation method (SPAC). Application to Grenoble area., Boletin de Geofisica Teoria e Applicata, 42, 3-4, 281-304.
