Measuring of thickness of the asphalt pavement with Use of GPR
The results of development, tests and application of the GPR for measurement of the road asphalt layers thickness are presented in the paper. Main necessary improvements providing the possibility of use the GPR as a measuring device are described as well as some results of application of the GPR for inspection of the road structure after reparation the road. It was achieved accuracy of layers thickness measurement better than 0.5 cm.
Comparison of different antenna configurations for probing of layered media
The paper presents the results of a comparative analysis of the different configurations of antenna systems (bistatic, monostatic, differential) in terms of the simplicity and accuracy of determining the thickness of the subsurface layers of stratified environment. To this end, corresponding diffraction problems are solved by the finite-difference time-domain forward solver for each measurement setup. The analysis has shown the advantages and prospects of using differential system with vertically spaced antennas in solving of practical problems of the layered medium GPR probing.
Inverse scattering method in electromagnetic sounding theory
The problem of reconstructing the medium characteristics from electromagnetic reflection data under excitation by plane waves is considered. The authors discuss exact methods based on analytical solution of the one-dimensional inverse scattering problem for a horizontally layered medium highlighting the simultaneous inversion of more than one parameter. Inversion methods for the one-dimensional magnetotelluric problems are also examined, including reconstructing the piece-wise continuous parameters.