Fig. 4From: Small-scale topographic irregularities on Phobos: image and numerical analyses for MMX missionCumulative size-frequency distributions (SFDs) of positive relief features (boulders) in Regions A (left) and B (right) plotted using CraterStats2 software (Michael and Neukum 2010). Results of previous studies are also shown for comparison (Karachevtseva et al. 2014; Murdoch et al. 2015; Rodgers et al. 2016)Back to article page