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<p>The prediction of mirage conditions by the IRTOOL engagement simulation program has been evaluated by comparison with experimental visible and IR observations extracted from the MAPTIP experiment data base. IRTOOL predictions have also been compared with the LWKD and PIRAM Boundary Layer programs for identical input conditions. For sensors located above about 20 meters the values of Minimum Mirage Range and Maximum Inter-Vision Range become inconsistent and all models show similar mirage threshold performance offset internally and from the measurements by approximately 1-3 km (5-20%). This may be related to uncertainties in the temperature profiles generated from Boundary Layer models. Variations of 2-4 deg C in Air Sea Temperature are insufficient to account for the observed deviations.
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<br>Subjects: NA</div>
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Georgopoulos, Antonios</div>
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