Propagation Deconvolution

It is well known that at radio frequencies the electrical properties of rocks are frequency dependent (e.g. Cook 1975, Davis & Annan 1989). As a result, the propagation properties of radiowaves, namely velocity and attenuation, are also frequency dependent. In particular, attenuation increases rapidly with increasing frequency. Ground penetrating radar (GPR) operators trade this property with resolution, which also increases with frequency, to determine the optimum antenna centre frequency to use for a particular application. However, it is often ignored or forgotten that pulsed GPR systems transmit broadband signals+H47 covering two octaves of frequencies or more and so the propagation properties vary significantly over the actual transmission bandwith.