00000nam 2200000zi 4500 9.934507 CaOODSP 20250428151803 m o d f cr |n||||||||| 240226e199008uuqucad ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn--- DR52-9/10-1990E-PDF Dion, D., author. Investigation of the air refractivity effects on IR sensors in the marine boundary layer / by D. Dion and B. Leclerc. Québec, Canada : Defence Research Establishment [Valcartier] = Centre de recherches pour la défense Valcartier : [Research and Development Branch, Department of National Defence Canada = Bureau - Recherche et développement, Ministère de la défense nationale Canada] : [National Defence = Défense nationale], August/août 1990 1 online resource (iii, 46 pages) : illustrations, charts text txt rdacontent computer c rdamedia online resource cr rdacarrier DREV report = CRDV rapport ; 4570/90 Digitized edition from print [produced by Defence Research and Development Canada]. Includes bibliographical references (page 45-46). "Refractivity effects in the marine boundary layer are investigated under representative conditions by using ray tracing. Effects on the variation of the maximum inter-vision range (optical horizon) and the angular error in relation to weather conditions are presented. The mirage formation is also analyzed. A parametric analysis shows that the contribution of water vapour to the total refractivity gradient is an order of magnitude lower than that of the temperature (in the IR spectrum regions free of significant resonances). For the analysis of refractivity phenomena, refractivity profiles are modelled to agree with the radio profiles defined in the NAAWS project. The influence of near-surface perturbations such as those caused by sea state and aerosols is assessed through simple tests"--abstract (page i). Includes abstract in French. Atmospheric radio refractivity Canada. Electrooptical devices Atmospheric effects Canada. Réfraction atmosphérique Canada. Dispositifs électro-optiques Effets de l'atmosphère sur Canada. Technical reports lcgft Rapports techniques rvmgf Defence Research Establishment Valcartier, issuing body. Canada. Department of National Defence. Research and Development Branch, issuing body. Canada. Department of National Defence, issuing body. CRDV rapport. 4570/90. (CaOODSP)9.934167 PDF 1.50 MB https://publications.gc.ca/collections/collection_2024/rddc-drdc/DR52-9-10-1990-eng.pdf DREV R-4570/90 ; CRDV R-4570/90