reflex 2D Quick - low cost GPR processing software

The program Reflex 2D-Quick allows an easy import, display, processing and interpretation of 2-dimensional GroundPenetratingRadar zero offset and seismic single shot data (click on the datatype for a video guide) . The program is free for Reflexw 2D-dataanalysis users but it can also be ordered as a lowcost standalone processing tool (see order button at the end of this page). The program offers the following possibilities:

direct import from different formats
easy change of the distance scaling and the geometry
standard processing with predefined default parameters which can be manually changed
different display possibilities like point or wiggle mode, scaling and zooming functions
printing the profiles with free scaling
interactive velocity adaptation for zero-offset, single shot (reflection and refraction) or VSP data
picking the onsets and combine the picked phases to a layer model
export the data to other formats like SEGY, SEG2
It is possible to start the program twice for a comparison of two different datasets. Consequently, you are also able to compare a processed dataset with the original dataset.

The program is useful for the following applications:

GPR or seismic reflection constant (zero) offset data
GPR or seismic single shot data (e.g. refraction seismics or single CMP’s)

processing and display

The following processing options are available:

subtract DC-shift
static correction
subtract mean (dewow)
compress
gain function
bandpass butterworth
background removal
running average
subtracting average
fk migration

The picture on the right shows a GPR example

The are many different display possibilities like point or wiggle mode, scaling and zooming functions available.

The data may be exported to the clipboard or saved as ASCII- or bitmap-data.

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.

velocity analysis

An interactive hyperbola-adaption for a simple determination of the average velocity from a zero-offset or CMP profile (see figure on the left) is integrated (see picute on the left). 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/first arrivals

The picking option allows to pick the traveltime and the amplitude of different onsets like reflectors or hyperbola or the first arrivals. 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 (see picture on the right) 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 a constant velocity for each layer or on a 2-dimensional velocity distribution allowing to take into account vertical and lateral velocity changes.

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