Fig. 4

Coverage maps for Phobos (top) and Deimos (bottom) for the images ≤ 80º incidence angle, and ≤ 70º emission angle used to make the SPC models. Black indicates areas not covered by images used to make the Deimos model (Phobos has global image coverage). Most of Phobos is covered by images ≤ 10 m pixel scale. Much of one hemisphere of Deimos (from approximately −170ºE to 30ºE) is covered by images ≤ 50 m pixel scale. The region between ~ 50ºE and 190ºE is covered primarily by a single image (f507a01). Its limb was used to constrain the model and it was incorporated into a few maplets at higher southern latitudes (> 30º), but it could not support maplets on its own elsewhere