Accession Number:

AD0870734

Title:

Airborne Measurements of Optical Atmospheric Properties at Night

Descriptive Note:

Final rept. 19 Jan 67-30 Apr 70,

Corporate Author:

SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA VISIBILITY LAB

Report Date:

1970-05-01

Pagination or Media Count:

382.0

Abstract:

This report presents atmospheric optical data collected at night in Thailand chiefly with airborne instruments during two field expeditions, one trip made during the wet monsoon season and one during the dry season. Results from eighteen flights are presented. The data include irradiance, directional reflectance of backgrounds, total scattering coefficients, atmospheric beam transmittance, path radiance, and directional path reflectance. Data for starlight, moonlight, and overcast conditions were derived for downward-looking paths of sight inclined at seven zenith angles 93, 95, 100, 105, 120, 150, and 180 degrees from altitudes of 1524 m and lower in five spectral regions, as follows four narrow band optical filters with maximum transmittances at 475, 515, 660, and 745 nm one broad band sensitivity representing the S-20 multiplier phototubes fitted with UV reflection filter. Simultaneous photoelectric Royco measurements of the distributions of atmosphere particle sizes are reported.

Subject Categories:

  • Atmospheric Physics
  • Military Operations, Strategy and Tactics
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE