Fig. 20
From: High-resolution shape models of Phobos and Deimos from stereophotoclinometry
Maplet residuals (a, b), maplet formal uncertainty (c, d), and vertex sigmas (e, f) for our Deimos global SPC model. These metrics indicate a model accuracy of ± 8–22 m. The vertex sigma for Deimos is likely not a good indicator of precision, due to limited satisfaction of the SPC imaging criteria. High vertex sigma values are concentrated at the edges of maplet coverage, where the maps do not agree well with the poorly constrained shape