Fig. 6
From: Regolith behavior under asteroid-level gravity conditions: low-velocity impact experiments
Combined PRIME-1 and PRIME-3 ejecta velocity measurements as a function of the impact velocity. PRIME-1 data is shown by red symbols. For PRIME-3, black symbols show impacts in the free-floating box (<10−4g), while green symbols show impacts at 0.05g. Impacts into quartz sand are marked by asterisks, and impacts into JSC-1 by triangles. Error bars are not shown for PRIME-1: they were smaller than the symbol size (Colwell 2003). PRIME-3 error bars represent the 1- σ error of the Gaussian fit to the velocity distribution of tracked particles. The dashed black line is a power law fit to the microgravity impacts in sand (index 0.50), and the red dashed line is a power law fit to all the impacts into JSC-1 (index 1.35)