Measurements of the Zenith Sky Brightness and Color During the Total Solar Eclipse of 12 November 1966 at Quehua, Bolivia
Applied Optics, Vol. 7, Issue 4, pp. 705-710 (1968)
http://dx.doi.org/10.1364/AO.7.000705
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Abstract
The brightness and the spectral distribution of the zenith sky in the 5300–6600 Å region were measured during the eclipse of 12 November 1966 at Quehua, Bolivia. At totality, the brightness at 5600 Å was observed to be 8.4 kR/Å, three orders of magnitude lower than the 2.2 × 104 kR/Å for the normal day sky. The spectral distribution is presented here in terms of a single parameter, the effective blackbody temperature for determining the predominance of secondary scattering during midtotality. The effective temperature was observed to change from 9100 °K for normal day sky to 11,100°K during totality.
Citation
B. S. Dandekar, "Measurements of the Zenith Sky Brightness and Color During the Total Solar Eclipse of 12 November 1966 at Quehua, Bolivia," Appl. Opt. 7, 705-710 (1968)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-7-4-705
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