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4 Dossier(s) trouvé(s) pour le chercheur principal "Lehn, W.H." (les projets pluriannuels sont regroupés):
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Polar Atmospheric Refraction
chercheur principal: Lehn, W.H.
Année(s) de permis: 1994
Résumé: Mirages occur fairly frequently in the arctic. They distort image and landform shapes as well as our perception of distance. This study will examine the underlying causes of mirages by collecting data using time lapse and video photography. This data will be used to examine a theoretical model which attempts to explain the distortion properties of mirages....
Année(s) de permis: 1994
Résumé: Mirages occur fairly frequently in the arctic. They distort image and landform shapes as well as our perception of distance. This study will examine the underlying causes of mirages by collecting data using time lapse and video photography. This data will be used to examine a theoretical model which attempts to explain the distortion properties of mirages....
Atmospheric Refraction Phenomena
chercheur principal: Lehn, W.H.
Année(s) de permis: 1987
Résumé: To study the optical refraction and image transmission in the lower layer of the atmosphere, in particular under conditions of temperature inversion. To improve the understanding of these processes, and to continue to search for remote sensing techniques that provide temperature profiles through optical measurements....
Année(s) de permis: 1987
Résumé: To study the optical refraction and image transmission in the lower layer of the atmosphere, in particular under conditions of temperature inversion. To improve the understanding of these processes, and to continue to search for remote sensing techniques that provide temperature profiles through optical measurements....
Licence #5020
chercheur principal: Lehn, W.H.
Année(s) de permis: 1985
Résumé: To further study meteorological optics by photographic recording of land forms and their refracted images over horizontal lines of sight; measurement of refraction and horizon shift by theodolite; local surveys of the photographed land forms and observation sites....
Année(s) de permis: 1985
Résumé: To further study meteorological optics by photographic recording of land forms and their refracted images over horizontal lines of sight; measurement of refraction and horizon shift by theodolite; local surveys of the photographed land forms and observation sites....
Licence #4015
chercheur principal: Lehn, W.H.
Année(s) de permis: 1984
Résumé: To investigate optical refraction in the lower layers of the atmosphere (anomalous refraction, such as the superior mirage and optical ducting). Photographic recording of land forms and their refracted images: measurement of refraction and horizon shift; some measurement of atmospheric temperatures in the lowest layers (10-15 meters); local surveys of the photographed land forms....
Année(s) de permis: 1984
Résumé: To investigate optical refraction in the lower layers of the atmosphere (anomalous refraction, such as the superior mirage and optical ducting). Photographic recording of land forms and their refracted images: measurement of refraction and horizon shift; some measurement of atmospheric temperatures in the lowest layers (10-15 meters); local surveys of the photographed land forms....
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