Measurements of Spectral Radiance of the Horizon Sky
- 1 December 1967
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 6 (12) , 2105-2109
- https://doi.org/10.1364/ao.6.002105
Abstract
Typical spectral radiance data are presented for a rectangular portion of the horizon sky under various weather conditions and at different solar positions. Representative curves were selected from a total of seventy-nine spectral radiance measurements which covered meteorological ranges (at 665 mμ) from 10 km to 106 km and solar altitudes from −6° to 74°. The north horizon at noon with a 30-km or greater meteorological range typically produced a peak spectral radiance of 5 μW cm−2sr−1mμ−1. The maximum spectral radiance value obtained in the study was 38 μW cm−2sr−1mμ−1 for the south horizon in winter. The reciprocal dispersion varied from 1.8 mμ/mm at 400 mμ to approximately 8 mμ/mm at 1000 mμ. A mixture of fog and haze produced a spectral radiance curve with two maxima.Keywords
This publication has 2 references indexed in Scilit:
- Spectral Radiance of Sky and Terrain at Wavelengths between 1 and 20 Microns II Sky Measurements*Journal of the Optical Society of America, 1960
- Continuously Recording Spectroradiometer*Journal of the Optical Society of America, 1958