THE L(W)WKD MARINE BOUNDARY LAYER MODEL

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Authors
  1. Forand, J.L.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
The report describes, in detail, several models and algorithms that are currently used at DREV to predict the effect of atmospheric refraction in a marine environment on image distortion, target detection range and mirage formation. The first model predicts the variation of the air temperature and water-vapour pressure as a function of height using a simple set of meteorological parameters. The second model produces refractive index height profiles for any wavelength band from the visible to the far infrared. The first part of the report discusses the basic scaling equations that are used in the LWKD and LWWKD models, possible techniques for their solution and the iterative method used at DREV. The two models are variations of the Walmsley-KEL-DREV (WKD) model and the Wavy WKD (WWKD) model, respectively. It also discusses the equations that relate the parameters produced by the basic scaling equations to other meteorological parameters of interest. The model used to calculate the refractive index profiles from the visible to the far infrared is also developed. The second part describes the program, LWWKD, which incorporates these two models and which can produce vertical profiles of refractivity, air temperature, relative humidity, and various structure parameters. The third part of the report presents some typical examples of the results obtainable using the program. TRUNCATED
Keywords
Ducting;Mirage;Similarity theory;Marine boundary layer
Report Number
DREV-9618 —
Date of publication
01 Mar 1997
Number of Pages
87
DSTKIM No
97-02049
CANDIS No
502215
Format(s):
Hardcopy;Document Image stored on Optical Disk

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