CE-3 ROI phase curves and normalized B4 decomposition. (a) Retrieved phase curves for the CE-3 ROI in the four GF-4 bands, with the B4 mare-terrain solution shown for comparison. (b) B4 SHOE/CBOE decomposition for the CE-3 ROI, normalized to unity at g = 30°, together with the CE-3 in situ model curve from W. Jin et al. (2015). The normalized decomposition in panel (b) uses finite-solar-disk-corrected zero-phase and sub-3﹩\mathop{.}\limits^{{\unicode{x000b0}}}﹩7 quantities.