Theoretical study on full-waveform inversion of transmittive ground penetrating radar data

摘要

The full-waveform inversion method of EM wavefield data of transmittive ground penetrating radar data like cross borehole radar for imaging the permittivity structure is presented. The EM full-waveform inversion method uses the conjugate gradient method to minimize an objective function. Frechet derivatives can be calculated by the cross-correlation at zero lag between the forward propagated wavefield and the backward propagated wavefiled represented by the adjoint Maxwell's equations. Both the forward and backward propagations are calculated by a same stable finite difference time domain method. The inversion algorithm is validated using a synthetic model having non-uniform permittivity distribution.