GPR Geophysical Software

---

The program Reflex 2D-Quick allows an easy import, display, processing and interpretation of 2-dimensional Ground Penetrating Radar zero offset and seismic single shot data The program offers the following possibilities: 

• direct import from different formats like SEGY, SEG2, DZT, RD3, DZT, DT1,HDR, DT, JPRB, Reflexw
• easy change of distance scaling and geometry
• standard processing with the following possibilities
  • subtract DC-shift and subtract mean (dewow)
  • static correction and correct topography
  • time cut and compress
    
  • gain function
    
  • bandpass butterworth
  • background removal
  • running and subtracting average
  • fk migration
  • XFlipProfile
    
  • extract datapart
• different display possibilites like point or wiggle mode, saling and zooming functions
• The data may be exported to the clipboard or saved as ASCII- or bitmap-data and to other formats like SEGY, SEG2
• Printing is possible with freely choosable scale either in cm or scale like 1:1000 with a print preview menu which allows to preview the size and shape of the print output and to define an individiual print header.
• interactive velocity adaptation for zero-offset, single shot (reflection and refraction) or VSP data
  • It is possible to adapt diffractions, reflections and straight lines. You may change the velocity, the radius of the target, the angle between the line and the target and the width of the calculated diffraction or reflection hyperbola. There is also the possibility of fitting  linear features either by changing interactively a line or by setting two points. The option core allows to vary interactively the velocities of the single layers of the individual cores stored within an ASCII-file. In addition an interactive use of the  intercept time method for seismic refraction data is included (see picture on the right). The option enables to get a first 1D-model very quickly.
• picking the onsets and combine the picked phases to layer model
  • You have the choice between manual picking, continuous picking and a semi-automatic picking using a  phase follower (manual editing is always possible). It is possible to export the picks into an ASCII-format together with the 3 space coordinates for a subsequent interpretation.
  • The so called layer-show offers the possibility to combine individual pick files, to plot them together with the wiggle-files and to output them in report form on printer or file containing the depths, velocities and amplitudes of the individual layers. The time-depth conversion of the picks is either based on mean or layer velocities

The program Reflex 3D-Scan allows to import and to analyse automatically rectangular 3-dimensional GPR- or seismic data which have been acquired along 2D-parallel lines in one or two perpendicular directions.  

Precondition is that the data have been acquired along equidistant parallel 2D-lines on a regular rectangular grid. This means that the traceincrement in one direction (x or y), the startposition of the 2D-lines and the scan increment between the 2D-lines must be equal. The data may have been stored on individual 2D-files or within a 3D-file. If stored within a 3D-file the end-positions of the internal 2D-lines must be identical in addition as well as the number of traces into profile direction. The traceincrement must be given within the original data.

In addition if the data have been acquired in two perpendicular directions (crossing lines) the trace increment must be equal for all 2D-lines but the scan increment between the parallel lines does not need to equal the traceincrement if the option interpolate scan to trace increment is active. In this case an automatic interpolation will be done.

If these preconditions are satisfied the 3D-scan program allows a very fast interpretation of your 3D-data.

Different dataformats are supported. The original data may be stored on individual 2D-files or on one 3D-file with the 2D-lines sequentially stored. With 2D-files acquired an automatic interpolation filter allows a resampling of the data in the direction of each line if the number of traces slightly differ in each 2D-line. A meandering data acquisition of the 2D-lines is supported.

Optionally some filter steps are automatically performed. They are: flip every 2. scan, compress, subtract DC-shift, dewow, static correction, time cut, background removal, bandpassbutterworth, subtracting average, migration (2D and 3D) and gain in timedirection.
The processing of the x- and y-scans may be done independently and the c-scans also may be built independently chosing the envelope of the original data.

Within the 3D-GPR ScanView menu which opens after all sorting and processing steps have been finished all display options of the 3D-datainterpretation are available (option windows, option scroll and option 3D-cube - see also Reflexw 3D-data interpretation).

A MPEG moviefile for the later use with a MPEG-player may be easily constructed for the scroll and the 3DCube mode.

Optionally the actual timeslice depending on the mouse position is shown in a second window. The actual cursor position is marked by a cross within the timeslice.