'Some measurements of the short term variability of r0
We present measurements of r0 collected with the Visible Imager: the science camera for the AEOS telescope's adaptive optics system. Sequences of long exposure images (0.5 sec -- 2.0 sec) give r0 on a timescale of a few minutes. Significant variability of measured r0 is found. The implications of this for modeling and simulation are discussed.