  As a calibrated laser pulse propagates through the atmosphere, the amount of
Rayleigh-scattered light arriving at the VERITAS telescopes can be calculated
precisely. This technique was originally developed for the absolute calibration
of ultra-high-energy cosmic-ray fluorescence telescopes but is also applicable
to imaging atmospheric Cherenkov telescopes (IACTs). In this paper, we present
two nights of laser data taken with the laser at various distances away from
the VERITAS telescopes and compare it to Rayleigh scattering simulations.
