A sample of Fresnel Peak spectra taken from the three JWST NIRSpec observations of Callisto. Each spectrum represents data from one representative spaxel for each of the locations listed. The spectra are shown prior to continuum subtraction. The Fresnel peak is smaller and more muted across most of Callisto’s trailing hemisphere. On the leading hemisphere, spaxels that overlap with Callisto’s major multi-ring basins, Asgard and Valhalla, show more defined structure. A spaxel from the Lofn/Heimdall region shows a particularly large Fresnel peak for Callisto. A comparison of a Fresnel peak from a JWST spaxel with that same data sampled every ∼0.026 µm to simulate the resolution of NIMS near 3 µm (G. B. Hansen & T. B. McCord 2004). This basic comparison only serves to showcase the excellent resolution of JWST compared to NIMS, not the sensitivity difference.