MASW - Multichannel analysis of surface waves

A dedicated module for Multichannel Analysis of Surface Wave (MASW) available in the RadExPro for easy and competent evaluation of S-wave velocities of the subsurface.

      • Compatible with any 2D geometry.
      • FV and FK dispersion images calculated independently – you get the best of both.
      • Joint inversion of fundamental and higher modes, unlimited number of modes allowed.
      • Exceptionally user-friendly design – you will enjoy it!

 

 

  • Input data from one of the many standard formats supported. Those inculde SEG-Y, SEG-2, SEG-D, SEG-B, SEG-1, etc. Besides, any non-standard demultiplexed data format can be easily defined and handled, including customizable trace header structure definition.
  • Read geometry from original trace headers, or easily define it using our intuitive Near-Surface Geometry Input module.
    Intuitive geometry assignement to MASW data
  • Calculate dispersion images for each seismic gather in both FV and FK domains independently. Pick dispersion curves of the fundamental and higher modes in any of the domains. Convenient semi-authomatic picking algorithm will help you making quick and accurate dispersion curve extraction.

 Dispersion image in FV domain

Dispersion image in FK domain

  • You don’t need to save each curve individually – when you are ready with all picks just click Add all curves button to send all of them to the inversion. Then you can always switch any of them on or off through the MASW Manager dialog.

 

  • You can jointly invert dispersion curves extracted for all modes, or specify any combination of the modes for the inversion. For instance, you may wish to invert the fundamental mode only, and then use the result as the initial model for joint inversion. Feel free to experiment and see what works better in your case.
  • You can invert all dispersion curves from all receiver midpoints automatically with just one mouse click, or work thoroughly with each midpoint one by one with your complete control of every step. You can also use the inversion result of one midpoint as the initial model for automatic inversion of the others.

 

  • Check the consistence of theoretical dispersion curve calculated from the final model with the original dispersion image. 

 

  • The resulting Vs model can be displayed on the screen, exported into and ASCII or GRD file.