Increase position sampling in FRD analysis

It is clear from previous analysis in PIPE2D-548 that the effect of FRD on the PSF varies depending on the position of the fiber in the camera. While corner, center, and edge cases were considered in that ticket, it would be especially valuable to determine how FRD effects vary on a regular and thorough position basis. This is especially important because it appears that one corner does not accurately represent all corners nor does one edge represent all edges, likely due to wavefront variations.