Accession Number:

AD0750114

Title:

Measurements of Laser Extinction in Ice Fog for Design of SEV Pilotage System

Descriptive Note:

Research rept.

Corporate Author:

COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH

Personal Author(s):

Report Date:

1972-08-01

Pagination or Media Count:

23.0

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 -43C. 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.

Subject Categories:

  • Lasers and Masers
  • Surface Effect Vehicles and Amphibious Vehicles

Distribution Statement:

APPROVED FOR PUBLIC RELEASE