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Proceedings Paper

Horizontal nonhomogeneous effects in the marine boundary layer
Author(s): J. Luc Forand
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Paper Abstract

The most recent version (Ver. 6.22) of the marine boundary layer (MBL) profile program, LWWKD, now allows the creation of a single file containing refractivity profiles for a multiple number of horizontal ranges. This file can then be used in the most recent version (Ver. 5.3) ofthe ray-tracing program, REFRACT, so as to simulate the effects of a horizontally non-homogeneous refractivity profile on predictions of maximum intervision range (MIVR) and minimum mirage range (MMR). Using range dependent meteorological measurements obtained from the Hr.Ms. Tydeman during the Marine Aerosol Properties and Thermal Imager Performance (MAPTIP) campaign, this model shows that under certain conditions, a single horizontally homogeneous profile can produce similar MIVR and MMR predictions to those resulting from using the range dependent profile. In general, a single homogeneous profile can give excellent results if it corresponds to the profile at the range for which the light rays are closest to the surface of the water (the observed horizon) and the refractivity gradient is strongest.

Paper Details

Date Published: 23 September 1997
PDF: 12 pages
Proc. SPIE 3125, Propagation and Imaging through the Atmosphere, (23 September 1997); doi: 10.1117/12.279022
Show Author Affiliations
J. Luc Forand, Defence Research Establishment Valcartier (Canada)

Published in SPIE Proceedings Vol. 3125:
Propagation and Imaging through the Atmosphere
Luc R. Bissonnette; Christopher Dainty, Editor(s)

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