Automated BSEF Analysis

The following shows the result of processing this GPR profile using BSEF automated analysis in the form of a section of the attribute "The real part of the complex relative permittivity" This is the most commonly used attribute. Undoubtedly, the information content of the result is significantly higher than that of the radarogram. The section can be easily divided into two layers. The top layer is bulk soil. On a section, this layer has colors ranging from light blue to dark red. The bedrock is represented by shades of blue.

Obviously, the transition from the presentation of data on the subsurface environment in the form of a set of amplitudes of the reflected signals (in the form of a radarogram) to the characteristics of this subsurface obtained as a result of applying the BSEF automated analysis method (in the form of an attribute section) significantly increases the informativeness of the GPR study and makes the result of this study more understandable as geoscientist and the customer of the GPR study. Exporting the processing results to graphic formats, spreadsheet formats and a grid data format allows you to work with these results in computer programs to visualize numerical arrays and create drawings, such as Surfer, AutoCAD or similar.

The full list of section attributes in GEORADAR-EXPERT is quite wide - the entire list can be found in the GEORADAR-EXPERT user manual, which is available on Download page. As an example, the figures below show sections along the GPR profile of the attributes of humidity and the Q-factor (the ratio of the center frequency of the signal spectrum to its width). Q-factor is often used to identify loose areas in the ground or areas of reduced strength in building structures.

The indisputable advantage of BSEF automated analysis is the ability to study subsurface environment, the electrophysical characteristics of which change smoothly, without sudden jumps that form reflective boundaries. On the radarogram obtained in the study of such a subsurface, the boundaries of the layers are not visible - as in the figure below to the left. The figure on the right shows a permittivity section along this GPR profile, created in the GEORADAR-EXPERT software:

  • The depth of GPR research is increasing - the data processing algorithm by the BSEF automated analysis method has high noise immunity and works well in areas of strong noise of signals located in the lower zone of the GPR profile;
  • The information content of GPR studies increases - a attribute section according to the results of an automated BSEF analysis allows obtaining information on the structure of the investigated subsurface environment even in the conditions of a smooth change in the electrophysical characteristics of this environment, i.e. in the absence of layer boundaries on the radarogram. If these boundaries are present, then a change in the electrophysical characteristics inside each layer also represents undoubted benefit;
  • Significantly increases the speed of processing GPR data, which is important for constantly increasing volumes of georadar works, especially in the road and railway industries;
  • The areas of application of the GPR method are expanding and the list of tasks to be solved with the help of this method is increasing;
  • The influence of the human factor on the processing and interpretation of GPR data is reduced;
  • Provides greater opportunities for the study of complexly constructed subsurface environments.