GEORADAR-EXPERT
software is designed for automated processing of GPR profiling results.
Automation in GEORADAR-EXPERT is used to perform time-consuming tasks that
convert raw field measurements into an interpretable form with minimal operator
involvement.
The
software combines standard GPR data processing methods with specialized
algorithms developed for GEORADAR-EXPERT to increase the informational value of
a GPR survey.
A key
element of the software is the automated analysis method for the BSEF
(Back-Scattering Electromagnetic Field). It provides the transition from an
amplitude-based data representation in the form of a radargram to a subsurface
model in the form of an attribute section. Attributes are characteristics of
the investigated medium and the wave field reflected from its heterogeneities,
as well as values calculated from them.
BSEF
analysis is implemented using neural network algorithms. These algorithms allow
useful signals to be detected in cases where traditional processing methods are
ineffective. Such cases include surveys in low-contrast or heavily noisy media,
as well as media with a smooth change in electrophysical characteristics with
depth. In such conditions, coherent reflection events do not form on the GPR
profile. These events are interpreted as boundaries between layers.
A set of
attribute sections obtained as a result of processing data from an area GPR
survey can be converted into a three-dimensional array. This conversion
provides additional capabilities for analyzing the spatial distribution of the
characteristics of the investigated medium. It also supports determining the
shape and volume of its structural elements.
A
statistical analysis module is implemented to identify relationships between
the physical-mechanical and electrophysical properties of the medium. These
properties are expressed through the attributes of the sections and their
statistical indicators. The identified patterns can be used to study similar
objects.
To work
with the amplitude representation of the survey result, the GPR profile, the
software includes a required set of signal processing functions. These
functions suppress noise and highlight useful reflections. The software also
includes GEORADAR-EXPERT algorithms for software-based improvement of the
resolution of GPR data.
The use of
resolution enhancement algorithms makes it possible to reduce the inverse
relationship between resolution and depth of the GPR survey. This relationship
is determined by the frequency characteristics of the probing pulse.
Low-frequency signals with high penetration capability are transformed into
shorter-duration waveforms. As a result, reflections from closely spaced layer
boundaries are localized more accurately.
The
software supports GPR data file formats from most well-known geophysical
equipment manufacturers. The processing results can be exported to graphic,
text, and tabular files, as well as to gridded formats for further use in GIS
or CAD systems.
GEORADAR-EXPERT
contains all necessary processing options for solving GPR tasks, including
cases with low informational value of field measurements. A more detailed
overview of the key capabilities of the software is provided below.