Panels a, b show AO/GBT observations, like Fig. 19 of Black et al.2 but the y-axis variable is maximum-NRCS. Panels c, d show Cassini altimetry observations. Panels a, c show latitude and panels b, d show date. Black dots are observations and orange-edged, cyan-filled rectangles are weighted means of the bins. Error bars show one standard deviation of the noise. There is an approximately consistent peak of the cyan/orange bins at ≈23°S between AO/GBT and Cassini and the latitude trends are somewhat similar. There is no agreement in the trends with date. Thus, the anomalously specular AO/GBT observations depend on location, not date.