Surface
Active Surface Wave Data Analysis
Efficiently process active surface wave data using MASW and SASW with GA inversion
Data input
- Import all seismic records of a survey line at one time
- Efficiently assign geometry measured with slope or horizontal distance
- Input elevation data
- Optionally load dispersion curves together with seismic data for reprocessing
Dispersion curve picking
- Mute noise and select traces for dispersion analysis
- Test apparent velocity of surface waves on traces
- Set frequency range with amplitude spectrum
- Incorporate elevation data in dispersion analysis
- Extract dispersion curves with MASW or SASW
- Generate dispersion images in F-K, F-V, or F-P domain
- Interactively or semi-automatically pick dispersion curves with a spectrum graph
Inversion
- Automatically or interactively build an initial model
- Specify Poisson's ratio and density for each layer
- Fix any layers in inversion
- Invert dispersion curves with genetic algorithm (GA)
- Allow simultaneous inversion of shear wave velocity and layer thickness
- Optionally constrain the inversion by the trend of initial model
- Support fundamental and higher modes of Rayleigh and Love waves
- Automatically invert dispersion curves of all records at a time
- Interactively pause and resume, or stop the inversion procedure
Plotting
- Plot dispersion curves and velocity models
- Display velocity sections with colours, contours, and editable lithologic symbols
- Trim velocity section based on the depth of bottom layer
- Plot well data
- Simultaneously display dispersion curves and velocity section
Output
- Apparent Vs, Vs30 (or Vs100), depth-weighted velocities, and SPT-N values
- Velocity section with a blanking file
