Airborne Measurements of Optical Atmospheric Properties in Northern Germany.

摘要

This report presents daytime atomspheric optical data collected chiefly with airborne instruments during a field expedition to northern Germany in the spring of 1973. Results from seven relatively low altitude flights are presented. The data include the natural irradiance upon horizontal plane surfaces, scalar irradiances, total volume scattering coefficients, atmospheric beam transmittances, path radiances, directional path reflectances, and directional sky and terrain reflectance. Data for daytime conditions ranging from scattered clouds to completely overcast were derived for upward- and downward-looking paths of sight inclined at seven zenith angles (0, 75, 80, 85, 95, 100, 180 degrees) from alitudes of 1200m above ground level and lower. Data were measured in four spectral regions, as follows: Three narrow band optical filters with mean wavelengths of 478, 664, and 765 nanometers; and one broad band sensitivity representing a pseudo-photopic response with a mean wavelength of 557 nanometers. (Author)