Optimized Interpretation Of Sageep 2011 Blind Refraction Data With Fresnel Volume Tomography And Plus-Minus Refraction

We improve the resolution of subsurface P-wave velocity tomograms with Fresnel Volume Tomography and Wavepath Eikonal Traveltime inversion, by iteratively decreasing the wavepath width. We use the SAGEEP 2011 blind refraction synthetic traveltime data to compare our tomograms with the known true model. We compare weighting of the wavepath velocity update with a Ricker wavelet vs. weighting with a Gaussian bell function. Plotting Plus-Minus refractors obtained with layer-based interpretation on the 2D velocity tomogram better visualizes both methods. Tomograms from an iterative approach of wavepath adjustment show improvement over the standard ray-based method.