Accession Number : AD0754898

Title :   Airborne Measurements of Optical Atmospheric Properties, Summary and Review.

Descriptive Note : Final rept. 1 Nov 69-31 Aug 72,

Corporate Author : SCRIPPS INSTITUTION OF OCEANOGRAPHY SAN DIEGO CALIF VISIBILITY LAB

Personal Author(s) : Duntley,Seibert Q. ; Johnson,Richard W. ; Gordon,Jacqueline I.

Report Date : NOV 1972

Pagination or Media Count : 82

Abstract : The report summarizes a 3-year period of collecting optical atmospheric data in the daytime chiefly with airborne instruments. Nine field expeditions were made between November 1969 and August 1972 in various places in the United States and Europe, primarily during the spring and fall. Measurements were made in five spectral regions, as follows: three narrow band optical filters with mean wavelengths of 478, 664, and 765 nanometers, and two broad band sensitivities, one representing the S-20 multiplier phototube incorporating an ultraviolet rejection filter with a mean wavelength of 532 nanometers, the other represnting the photopic response with a mean wavelength of 557 nanometers. Optical measurements included total scattering coefficient and sky and terrain radiance. These data were used to calculate natural irradiance on a horizontal plane surface, directional reflectance of terrain, atmospheric beam transmittance, path radiance, and directional path reflectance. The methods of data collection and data processing are reviewed, the resultant data bank described, and initial comparisons made between several of the field expeditions. (Author)

Descriptors :   (*ATMOSPHERES, OPTICAL PROPERTIES), VISIBILITY, METEOROLOGICAL PHENOMENA, ATMOSPHERIC REFRACTION, SCATTERING, REFLECTIVITY, OPTICAL INSTRUMENTS, AIRBORNE

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE