Designing a GPR Survey
Their is often a myth in the construction industry that ground penetrating radar (GPR) can find any buried object, at any depth and in any environment. This statement could not be further from the truth.
GPR surveys need to be carefully considered and designed with a specific target in mind. Antenna frequency and survey environment are the two key components.
Antennas with a high frequency will give high resolution data allowing small targets such as rebar to be imaged, however they are only capable of penetrating short distances into the subsurface. Low frequency antenna sit at the other end of the spectrum, they will penetrate much deeper into the ground but have a much lower resolution and can therefore only image much larger targets.