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15 June 1995 Forecasting the atmospheric optical turbulence neutral events
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Atmospheric optical turbulence (AOT) degrades seeing conditions over long horizontal paths. Embedded into the typical AOT diurnal cycle are two time periods in which the AOT is at a minimum; these periods are called neutral events (NE). Previously, we stated that the NE generally occurs 60 min after sunrise and 40 min before sunset. We refine this empirical model using a statistical analysis on a March-June 1994 AOT-NE data set sampled over the Tularosa Basin, New Mexico. Reviewing the months successively, a systematic change in the time differential between sunrise (sunset) and NE was observed. This and other March-to-June trends are discussed, as are several factors that cause variations in the NE forecast. We conclude with recommendations for refining the AOT-NE forecasting model.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Gail M. Vaucher and Robert W. Endlich "Forecasting the atmospheric optical turbulence neutral events", Proc. SPIE 2471, Atmospheric Propagation and Remote Sensing IV, (15 June 1995);

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