Dandekar B S
Electrical Engineering Department,Northeastern University, Boston, Massachusetts 02115, USA.
Appl Opt. 1968 Apr 1;7(4):705-10. doi: 10.1364/AO.7.000705.
The brightness and the spectral distribution of the zenith sky in the 5300-6600 A region were measured during the eclipse of 12 November 1966 at Quehua, Bolivia. At totality, the brightness at 5600 A was observed to be 8.4 kR/A, three orders of magnitude lower than the 2.2 x 10(4) kR/A 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 degrees K for normal day sky to 11,100 degrees K during totality.
1966年11月12日在玻利维亚的克瓦亚发生日食期间，对天顶天空在5300 - 6600埃区域的亮度和光谱分布进行了测量。在全食时，观测到5600埃处的亮度为8.4千勒克斯/埃，比正常白天天空的2.2×10⁴千勒克斯/埃低三个数量级。这里根据一个单一参数——有效黑体温度来呈现光谱分布，该参数用于确定全食中期二次散射的优势。观测到有效温度从正常白天天空的9100开尔文在全食期间变为11100开尔文。
