Share Email Print

Proceedings Paper

Improved vertical refractive-index structure parameter model for the maritime atmosphere based on local bulk meteorological measurements
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The refractive index structure parameter C 2/n(z) as a function of vertical height z, is a key parameter describing the turbulent intensity of the atmosphere, and is important for modeling and predicting beam propagation behavior. Over the past several decades many vertical C 2/n models have been developed, many based on empirical data from field test campaigns involving difficult in situ measurements by radiosondes, or remote-sensing using scidar/lidar/radar techniques. Each model has its own set of limitations and caveats. We have developed an improved C 2/n parametric model for the maritime environment, which uses the Navy Surface-Layer Optical Turbulence model for the low-altitude surface boundary layer, and merges with a generalized Hufnagel-Valley model for the middle- and upper-altitudes (up to 24 km elevation). It takes inputs of local bulk meteorological measurements and forms an estimate of C 2/n based on Monin-Obukhov similarity theory. We present phase-screen wave-optics propagation simulations comparing our improved model with previous models, in terms of turbulence metrics such as Fried's atmospheric coherence width r0, the scintillation index, and the Strehl ratio for both the weak and strong turbulence regimes, for vertical and slant paths, and for various characteristic regimes of the ratio w0=r0, where w0 is the Gaussian beam waist radius.

Paper Details

Date Published: 24 October 2012
PDF: 10 pages
Proc. SPIE 8517, Laser Communication and Propagation through the Atmosphere and Oceans, 85170L (24 October 2012); doi: 10.1117/12.973361
Show Author Affiliations
Colin N. Reinhardt, Space and Naval Warfare Systems Ctr. (United States)
Stephen M. Hammel, Space and Naval Warfare Systems Ctr. (United States)
Kevin McBryde, Space and Naval Warfare Systems Ctr. (United States)
Dimitris Tsintikidis, Space and Naval Warfare Systems Ctr. (United States)

Published in SPIE Proceedings Vol. 8517:
Laser Communication and Propagation through the Atmosphere and Oceans
Alexander M. J. van Eijk; Christopher C. Davis; Stephen M. Hammel; Arun K. Majumdar, Editor(s)

© SPIE. Terms of Use
Back to Top