Difference between revisions of "Active source experiment (MASW)"
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=== Getting ready === | === Getting ready === | ||
| − | * Load | + | * Download the [[Media:signal_masw.dat| SEG2 signal file]]. This file contains 24 seismic traces. |
| − | * | + | * Launch [[Geopsy|Geopsy]] and set ''Rxxx'' as name in the [[Geopsy:_Preferences| Geopsy Loading Preferences]]. |
| + | * [[Loading and viewing signals|Load and view]] this signal. | ||
| + | * Select in menu [[Geopsy: Tools|''Tools'']] ([[Geopsy: Tools|alternative ways]] to start a tool) | ||
=== Checking sources and receivers location === | === Checking sources and receivers location === | ||
Revision as of 14:32, 11 March 2010
Contents
General overview
First introduced by Al-Husseini et al. (1981), Mari (1984), Gabrielset al. (1987), the Multichannel analysis of surface waves was popularized by Park et al. (1999). This technique relies on the recording along a 1D linear profile of seismic signals produced by a controlled source (hammer, vibrator, explosion, etc.) and analysis of surface wave dispersion properties after applying slant-stack or FK transform to the recorded seismic section. In the following tutorial, only the FK transform is used.
Getting ready
- Download the SEG2 signal file. This file contains 24 seismic traces.
- Launch Geopsy and set Rxxx as name in the Geopsy Loading Preferences.
- Load and view this signal.
- Select in menu Tools (alternative ways to start a tool)
Checking sources and receivers location
- Edit headers if needed
- cross-link avec table, set headers
Description of the MASW toolbox
- difference entre taper et processing window
- HRFK (cross-link avec HRFK de Mathias)
- normalize energy
FK Computing
- computation for one single file and picking of the curve
- alternatives : 1) create a stack file and then compute the FK; 2)compute FK for all shots and then stack the FK maps
