Hyperbolic reflection
Definition
The bowtie-shaped pattern in a GPR time section produced as the antenna passes over a point-like object. The shape is governed by the wave velocity in the host medium, making it a useful calibration target for depth estimation.
Related terms
- Attenuation
- The reduction in radar signal amplitude with distance traveled. Electrically conductive materials (wet clay, saline soil) convert signal energy to heat, limiting...
- Dielectric permittivity (epsilon)
- A material property that controls how fast electromagnetic waves travel through it and how strongly they reflect at a boundary. Water has...
- Migration
- A processing step that repositions reflections from their apparent location (a spread-out hyperbola) to their true subsurface location (a point or plane),...
- Time window
- The total two-way travel time recorded by the GPR per trace, effectively setting the maximum depth sampled. The time window must be...
- Velocity calibration
- The process of estimating the true electromagnetic wave velocity in the survey soil, usually by fitting a hyperbola to a known reflector...
Explained in
- GPR Signal Physics and Soil Geology EffectsThe bowtie-shaped pattern in a GPR time section produced as the antenna passes over a point-like object. The shape is governed by the wave velocity in the host...