Geogiga Surface 9.1 — Surface Wave Data Processing Software

SURFACE is able to process active surface waves with SASW and MASW. The dispersion spectrum can be calculated in F-K, F-V, or F-P domain, where the fundamental and higher-mode dispersion curves are interactively picked. The robust forward modeling and the global genetic algorithm (GA) assure the quick convergence of inversion.

Features

Load all shots simultaneously, browse and select any record for QC

Input and plot the elevation of a survey line

Mute noise in time domain and select traces for dispersion analysis

Test the apparent velocity of surface waves on seismic data

Check frequency range with amplitude spectrum analysis

Process active surface waves with SASW and MASW

Calculate dispersion spectrum in F-K, F-V, or F-P domain

Automatically pick dispersion curves with a predefined frequency interval and decimate the picks if needed

Interactively pick fundamental and higher-mode dispersion curves with a spectrum graph

Handle both Rayleigh and Love waves

Automatically build an initial model based on the curvature of dispersion curve or thickness of layers

Interactively define an initial model with the constraint of apparent Vs

Specify Poisson's ratio and density for each layer of an initial model

Allow fixed layers in inversion

Jointly invert fundamental and higher-mode dispersion curves with genetic algorithm (GA)

Define the search range of velocity or thickness for each layer in the inversion

Allow the inversion of dispersion curve constrained by the trend of initial velocity modelnew

Auto select and invert all the dispersion curves at one time

Interactively pause and resume or stop the inversion procedure

Calculate apparent Vs, Vs30(or Vs100), depth-weighted velocities, and SPT-N values

Plot dispersion and velocity curve at a single location

Compare different dispersion and velocity curves at the same location

Display the dispersion curves and velocity section along a line

Trim the velocity section based on the depth of the deepest layer above the half-spacenew

Plot well data on the velocity section

Output velocity section with contours and editable lithologic symbols

Screenshots

Calculate dispersion spectrumin F-K, F-V, and F-P domain