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Title: Measurements of laser extinction in ice fog for design of SEV pilotage system
Authors: United States. Advanced Research Projects Agency.
Munis, Richard H., 1936-
Delaney, Allan J.
Keywords: Air cushion vehicle
Ground effect vehicle
Helium-neon laser measurements
Optical properties of ice fog
Surface effect vehicle
Terrain avoidance systems
Issue Date: Aug-1972
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Research report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 302.
Description: Research Report
Abstract: Laser extinction measurements in ice fog were made at wavelengths of 0.6328, 1.15 and 3.39 microns. The ice fog was generated in an environmental chamber whose temperature could be lowered to -43°C. Particle sampling was carried out simultaneously with the laser measurements using an impactor. Size distributions were derived from the impactor measurements. These data were used to compute Mie extinction coefficients at the three laser wavelengths. These coefficients were compared with the coefficients derived experimentally. Although some discrepancy exists between theory and experiment, both agree fairly well on the behavior of the extinction coefficient as a function of particle concentration.
Appears in Collections:CRREL Research Report

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