Accession Number : AD0666936

Title :   MEASUREMENT OF CLOUD REFLECTANCE PROPERTIES AND THE ATMOSPHERIC ATTENUATION OF SOLAR AND INFRARED ENERGY.

Descriptive Note : Final rept. Sep 65-Dec 67,

Corporate Author : GENERAL DYNAMICS/CONVAIR SAN DIEGO CALIF

Personal Author(s) : Griggs,M. ; Marggraf,W. A.

Report Date : DEC 1967

Pagination or Media Count : 165

Abstract : The results of measurements made with an instrumented DC-3 aircraft are presented and discussed. In the infrared 8 to 14 microns 'window' region, both the integrated and spectral radiances of different surfaces were measured as a function of altitude to 18,000 feet, and compared with a theoretical model. Surface temperature measurements were made in order to determine the mean emissivity of stratus clouds, the ocean, the desert, and snow, in the 'window' region. In the visible region, the albedos of the above surfaces, plus forest and grass surfaces, were determined from measurements of the total down and total up fluxes of solar radiation. The total down flux measurements are compared with a theoretical model. The directional reflectivity and polarization of stratus clouds, the ocean, and snow, were determined as a function of wavelength in the visible region. These optical properties of clouds are related to cloud properties such as thickness, liquid water content, and droplet size distribution. Stratus cloud radiances determined with an aerial camera on a U2 at altitudes up to 65,000 feet are analyzed. (Author)

Descriptors :   (*ATMOSPHERES, SOLAR RADIATION), (*CLOUDS, REFLECTIVITY), (*SOLAR RADIATION, ATTENUATION), ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, INFRARED SPECTRA, TRANSPORT AIRCRAFT, VISIBILITY, RADIOMETERS, SURFACE TEMPERATURE, EMISSIVITY, POLARIZATION, TERRAIN, ALBEDO, PARTICLE SIZE, DISTRIBUTION, HIGH ALTITUDE, INTERFEROMETERS, AERIAL CAMERAS, TABLES(DATA)

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE