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Daniel Bigman of Learn GPR | Episode 012
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Episode 012 Shownotes
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Here is a list of topics covered in my interview with Daniel Bigman of Learn GPR.
Background- PhD from the University of Georgia and is an expert in non-invasive subsurface mapping and 3D imaging
- Started with archaeological project using NDT (Non-Destructive Testing) to map ancient site. Transitioned to civil engineers and using GPR for concrete scanning, utility locating.
- Daniel is on the board for Engineering Environmental Geophysical Society & Associate Editor for Fast Times a leading magazine for subsurface geophysical.
- GPR = Ground Penetrating Radar
- Current project in Yucatan Peninsula investigating how ancient people interacted with environment.
- How GPR Works
- High frequency (1000-2600 Megahertz) yields better resolution
- Need to layer several techniques to find most to all buried infrastructure to create a ArcGIS or AutoCAD plaform.
- Start with electromagnetic locator (EM) because it's faster
- Then, use GPR to clean up data acquisition.
- GPR & EM can be used on same unit.
- GPR is not as effective in salt water environments
- Antenna frequency and geophysical properties of material can affect GPR results.
- Need to use multiple GPR antenna's to access different depths and in different soil conditions.
- No instrument is 100% effective.
- How to integrate GPR and drones.
- Adoption of GPR on autonomous cars will be slower due to noise issues with additional electronic sources surronding GPR unit. However, technology is currently employed for landmine detection.
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