Sharp W E, Silverman S M, Lloyd J W
Appl Opt. 1971 Jun 1;10(6):1207-10. doi: 10.1364/AO.10.001207.
A selected group of measurements of the sky brightness during total solar eclipses is used to determine a standard light curve during the period from no obscuration to totality. It is found that the sky light may be considered as attenuated sunlight up to at least 99.8% obscuration. During totality, the sky light consists of multiply scattered light from outside the umbral region. The effects of solar elevation angle, cloud cover, and albedo and the variability of the light curve during totality are discussed.
一组从日全食期间天空亮度测量值中挑选出的数据，用于确定从无遮挡到全食阶段的标准光变曲线。研究发现，在遮挡至少达到99.8%之前，天空光可被视为衰减的太阳光。在全食期间，天空光由本影区外多次散射的光组成。文中讨论了太阳仰角、云量、反照率的影响以及全食期间光变曲线的变化情况。
