Knowledge of the atmospheric conditions along an optical path is crucial to many experiments. A technique using differential scintillations was adapted for the Small Mobile Atmospheric Sensing Hartmann (SMASH) system to estimate proles of the refractive-index structure constant, C2n(z), and the wind speed. Estimates of those parameters from data taken along a 1 km horizontal path over level ground at a height of about five feet at Kirtland AFB is presented. Five sonic anemometers, placed along the path, serve as an independent estimate of the turbulence conditions with which to evaluate SMASH's performance.
Sonic anemometers have been used extensively to measure virtual temperature fluctuations associated with turbulence and thereby determine the temperature structure function parameter. While it is common to utilize the temperature power spectrum in such an analysis, it is similarly possible to use a structure function based approach. In this work, we consider the details involved and benefits/disadvantages of processing by each method.
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