Comparison between parameters optimized and estimated by non-linear least-squares and dense neural network fits. Left: absolute difference between calibrated parameter values and fitting parameters. The first plot is the difference for the z parameter, the center plot is the difference for the θ parameter, and the last plot for ϕ. The fit used was that of Eq. (1) with values in Table 2. The vertical axis of the plots are x values in cm and horizontal axis, y in cm. Right: same analysis, but with a fit computed by a DNN.