MEASUREMENT OF SPECTRAL RADIANCE OF THE HORIZON SKY
Abstract
Spectral radiance data were obtained for a rectangular portion of the horizon sky under various weather conditions and at different solar positions. Representative curves were selected from 79 spectral radiance measurements which covered meteorological ranges (at 665 millimicrons) from 10 to 106 km and solar altitudes from -6 to 74 degrees. The north horizon at noon, with a 30 km or greater meteorological range, typically produced a peak spectral radiance of 5 micron w/sq cm-srad-millimicrons. The maximum spectral radiance value obtained in the study was 38 micron w/sq cm-srad-millimicrons for the south horizon in winter. The reciprocal dispersion varied from 1.8 millimicrons/mm at 400 millimicrons to approximately 8 millimicrons/mm at 1000 millimicrons. A mixture of fog and haze produced a spectral radiance curve with two maxima.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 04, 1967
- Accession Number
- AD0663883
Entities
People
- G. L. Knestrick
- J. A. Curcio
Organizations
- United States Naval Research Laboratory