Fig. 1. Representation of the numerical implementation of the experiment in which denotes the peak electric field amplitude (the deviation angle is exaggerated).

Fig. 2. Contours of as a function of and where (a) compares and and (b) compares and .

Fig. 3. The approximate posterior after processing observations in line with Algorithm 3, where in the bottom panel the dashed line demarcates the sample mean. All distributions have accepted proposals.