 We propose here an extension of these approaches,  using non-linear slope tomography (rather than standard tomographic migration velocity analysis as in previous publications).
<meaning-changed>  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 here an extension of these approaches, sampling an equi-probable contour of the tomography posterior probability density function (pdf) rather than the full pdf, and using non-linear slope tomography (rather than standard tomographic migration velocity analysis as in previous publications).