Assessment of layer thickness and uniformity in railway embankments with ground penetrating radar
ByF.M. Fernandes, M. Pereira, A.G. Correia, P.B. Lourenço & L. Caldeira
Pages 6

The georadar is a non-destructive and non intrusive inspection technique, which principle is based on the radiation of very short electromagnetic impulses (<10 ns) that are reflected at interfaces of materials with different dielectric properties (Figure 1).