Observed (December 2019) and computed power patterns. The upper row corresponds to the 3C84 observed beam using the 7 mm receiver at a mean elevation of 48 deg (azimuth scans). The lower row shows the best fit for an n = 5. The observed focused beam (top centered panel) has a S/N of 610. We note that in the observing case, the S/N of the ±d_z maps may be noisier than the simulated case in Fig. 5. Observing with a defocused telescope degrades the imaging further, increasing the observed noise level.