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Asked by mani619 to Jamie, Mark on 25 Mar 2011 in Categories: General.
Keywords: carbon, composites, conductive, dielectric, electrically, electromagnetic, energy, fibers, incident, materials, metals, radar, reflect, surface, transparent
An excellent question! You are dead right – when conducting GPR surveys, the electro-magnetic waves need to bounce off something in the sub-surface to get reflected back to the surface and be recorded. If these surfaces have a high contrast when compared to background materials, such as metal (which also has a magnetic component) then you should get a strong signal back.
A good example of a more transparent material problem is looking for the bones of murder victims in calcium-rich, coastal sands – there would be little di-electric permittivity contrast between the calcium bones and the calcium sands, so the GPR equipment may not detect where the body is present – very current research.
I really don’t think that I can help you with this one. It is well beyond my field of science. I am sorry.
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