Traveltime sensitivity kernels : Banana - doughnuts or just plain bananas ? a

Estimating an accurate velocity function is one of the most critical steps in building an accurate seismic depth image of the subsurface. In areas with significant structural complexity, one-dimensional updating schemes become unstable, and more robust algorithms are needed. Reflection tomography both in the premigrated (Bishop et al., 1985) and postmigrated domains (Stork, 1992; Kosloff et al., 1996) bring the powerful technologies of geophysical inversion theory to bear on the problem.