 We propose here an extension of these approaches,  using non-linear slope tomography (rather than standard tomographic migration velocity analysis as in previous publications).
<clarity>  We propose here an extension of these approaches,  using non-linear slope tomography (rather than standard tomographic migration velocity analysis as in previous publications).
 We propose an extension of these approaches, using non-linear slope tomography (rather than standard tomographic migration velocity analysis as in previous publications).