7 October 2014 Simultaneous atmospheric extinction and scintillation estimation using a modulated beacon
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Abstract
The authors have recently developed an optical transmissometer device used for estimation of the visibility and atmospheric extinction coefficient along a horizontal or slant terrestrial path of ranges from 500m out to 6 km. This is a bistatic device using a modulated LED beacon transmitter and an 8” (200mm) primary receiver lens with a silicon (Si) photodetector. We discuss how this device can be used to simultaneously obtain an estimate of the atmospheric turbulence characteristics along the same propagation path, using the optical intensity scintillation effect, without requiring any hardware modifications to the existing device. Device principles of operation are presented, followed by the results of a preliminary proof-of-concept field test which yielded encouraging results showing validity of the basic system design but indicating that additional engineering work is required to resolve some implementation details, and further field testing needed to verify and validate the system.
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Colin N. Reinhardt, Colin N. Reinhardt, David T. Wayne, David T. Wayne, Stephen M. Hammel, Stephen M. Hammel, } "Simultaneous atmospheric extinction and scintillation estimation using a modulated beacon", Proc. SPIE 9224, Laser Communication and Propagation through the Atmosphere and Oceans III, 92240R (7 October 2014); doi: 10.1117/12.2063682; https://doi.org/10.1117/12.2063682
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