a) Flux comparison between data in row 14 and row 20, both at ~12° phase and ~170° longitude but different latitudes (~0° and ~+18°, respectively) and b) comparison between row 8 and row 14, data at ~70° phase observing similar positive latitudes (~25°), but different longitudes (~232° and ~186°, respectively). Both comparisons show very little difference (well within the uncertainties of the data) between the spectra at similar phase angles; but a statistically significant difference, up to a factor of ~10, between the different phase angles sampled in the two panels.