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30 April 2003 Diurnal variations in multiple optical ground-site availability
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Proceedings Volume 4976, Atmospheric Propagation; (2003)
Event: High-Power Lasers and Applications, 2003, San Jose, CA, United States
Results are presented for diurnal and seasonal variations in availability for multiple optical ground sites within the Hawaiian Islands. The probability of at least one site available, given one, two and three sites to select from, is modeled. Availability is based on the requirement to simultaneously satisfy constraints on probability of cloud-free line-of-sight and operational thresholds for relative humidity and wind speed. These affect optical coating performance and life, and pointing accuracy, respectively. Modeling techniques are also described for maintaining consistency in the accuracy and fidelity of the atmospheric models in the absence of long-term or site-specific measurements. The results show that availability varies dramatically with time-of-day, and is significantly improved when the number of sites considered increases from only one to two. The analysis also shows that the net effect of wind speed and humidity as a function of time-of-day is not intuitive. The results are applicable to space object imaging, and ground-to-space laser communications and energy projection.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David A. Nahrstedt "Diurnal variations in multiple optical ground-site availability", Proc. SPIE 4976, Atmospheric Propagation, (30 April 2003);

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