DST3-RAV™ 2026

DST3-RAV™ is a Windows® program, which facilitates comprehensive Downhole Seismic Testing (DST) data reduction, analysis, and display. The user is provided with an extensive set of mathematical tools and patented algorithms to derive DST interval velocities and to quantify vertical seismic profiles. In addition, DST3-RAV™ allows the review of frequency spectra, the comparison of both unfiltered and digitally filtered traces, and the plotting of interval velocity profiles. DST3-RAV™ also provides extensive chart editing, plotting, and exporting functionality.
DST3-RAV™ includes the following features:
  • Configurable for either geophones or accelerometers.
  • Extensive frequency spectrum analysis.
  • Bandpass, high pass, low pass, and notch digital filters.
  • Polarization analysis.
  • Ability to rotate the X, Y, and Z source wave responses onto a single full waveform axis.
  • Ability to rotate the X, Y, and Z responses onto the P-SV-SH raypath coordinates.
  • Three independent velocity estimates for the X, Y, and Z components.
  • Velocity estimate for the full waveform (i.e. ρ = √x2 + y2 + z2).
  • Patented P-Wave and S-wave velocity estimation algorithm.
  • Batch job processing.
  • Source wave arrival time estimation.
  • Linear least squares regression interval velocity estimation.
  • Reverse Polarity Technique.
  • Forward Modeling Downhill Simplex Method (FMDSM) in estimating interval velocities.
  • Analytically modelling poor DST arrival time measurements with high order polynomials
  • Display of Vertical Seismic Profiles (VSPs) with trend line specification.
  • Display of peak particle accelerations, velocities, and displacements.
  • 3D Displays of VSPs.
  • Calculation of interval Gmax values.
  • The ability to carry out data interpolation to increase the time series resolution.
  • Post data stacking.
  • Application of Source Feature Isolation (SFI) to minimize the effect of near field waves, refractions, "dirty" sources, and source wave multiples.
  • Display of calculated interval velocities.
  • Option to display site information data entered during data acquisition.
  • Option to convert SEG2 files, Excel files and Geotech AB data acquisition files so they can be analyzed.
  • Option to process seismic data with polarization analysis in batch mode.
  • Option to process seismic data with signal decay in batch mode.
  • Option to export FMDSM interval velocity estimates to a text file.
  • Option display pre-trigger data.
  • Optimized correlator (when calculating initial interval velocities) to ensure an equivalent sampling rate of 100 KHz by utilizing linear interpolation between digitally sampled points.
  • Enhanced display options when viewing seismic data and displaying standard VSPs or full waveform VSPs.
  • Option to save or export user specified arrival times when displaying standard VSPs and to display previously saved arrival times when displaying standard VSPs.
  • Powerful Seismic Trace Characterization (STC) algorithm. 
  • 64 bit environment and parallel processing.
  • InterBase 64 bit databases.
  • Ability to calculate and save Relative Arrival Times (RATs) from true interval DST where top and bottom sensors are present.