A major issue in the application of waveform inversion methods to
crosshole georadar data is the accurate estimation of the source
wavelet. Here, we explore the viability and robustness of incorporating
this step into a time-domain waveform inversion procedure through
an iterative deconvolution approach. Our results indicate that, at
least in non-dispersive electrical environments, such an approach
provides remarkably accurate and robust estimates of the source wavelet
even in the presence of strong heterogeneity in both the dielectric
permittivity and electrical conductivity. Our results also indicate
that the proposed source wavelet estimation approach is relatively
insensitive to ambient noise and to the phase characteristics of
the starting wavelet. Finally, there appears to be little-to-no trade-off
between the wavelet estimation and the tomographic imaging procedures.