Fig. 25
From: High-resolution shape models of Phobos and Deimos from stereophotoclinometry
Distribution of surface slopes on the new Phobos (top) and Deimos (bottom) SPC models. The calculations account for the presence of Mars at a distance equal to the mean semi-major axis of each moon’s orbit. High slopes on Phobos are located primarily within the walls of craters. High slopes on Deimos are primarily located in the saddle (90ºS view), which accounts for the tail of histogram at slopes > 20º. The higher-resolution topography reveals more locations with steep slopes relative to previous studies