Please use this identifier to cite or link to this item:
|Scopus||Web of Science®||Altmetric|
|Title:||Tackling the non-linearity problem in GPR waveform inversion|
Van der Kruk, J.
|Citation:||Proceedings of XIII International Conference on Ground penetrating Radar (GPR 2010), held in Leece, Italy, 21-25 June 2010: pp.698-703|
|Conference Name:||International Conference on Ground penetrating Radar (13th : 2010 : Leece, Italy)|
|G. A. Meles, S. A: Greenhalgh, A. G. Green and J. van der Kruk|
|Abstract:||Crosshole radar tomography is a non-invasive tool used in diverse geological, hydrogeological and engineering investigations. Conventional tomograms provided by standard ray-based techniques have limited resolution. Higher resolution radar tomograms can be derived by using full-waveform inversion schemes. However, despite the theoretical improvement in resolution, convergence problems can arise in the application of full-waveform schemes due to the ill-posed nature of the inverse problem and the high non-linearity of the relationship between the model parameters and the scattered fields (i.e. the forward problem). We present here a new inversion scheme that starts with a low-pass filtered version of the radargrams and progressively expands the frequency bandwidth as the iterations proceed, thus reducing the likelihood of the inversion getting trapped in a local minimum. The benefits over standard fullwaveform time- domain inversion are demonstrated by means of three synthetic examples.|
|Appears in Collections:||Physics publications|
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.