Ground Penetrating Radar
What is a GPR?
Objective methods allowing for continuous soil analysis, which could show its structure with all inclusions (pipes, cords, concrete elements) did not exist until recent years. Despite the fact that the first GPR was in use in 1929 in Austria, first models appeared on market in 1970s.
How does it work?
Impulse GPR is a precise transceiver involving use of electro-magnetic waves. An antenna sends an intermittent sinusoidal impulse of 1,5 period. Another identical antenna, mounted at a certain distance, receives reflected signal delayed to the one sent by the first antenna. The delay is at a certain value ranged from tens to few thousand nanoseconds.
Procesing
GPR produces unprocessed phalograms, containg hundreds of superimposing images, distortions, noises and interferences. Data processing is the key task for GPR operator. In order to give us interesting information, data needs to be processed in numerous ways.
Interpretation
Data obtained through GPR must be read properly. With the use of the filters and own experience, the operator is able to well interpret GPR data.
3D and GPR
..., a fully three-dimensional model can be obtained through superimposing sequential 2D profiles, taken within constant distance...
