Solar Intensity and Intensity and Polarization of Sky Radiation for 347.0, 488.0 and 533.5 NM. At Selected Points Along the Sun's Vertical and Other Meridians Measured at 2818 M A.S.L

摘要

Measurements of solar intensity and of the brightness and polarization of sky radiation for 347.0, 488.0 and 533.5 nm have been made at Weissfluhgipfel (2818 m a.s.l., near Davos, Switzerland) for angular elevations of 90 degrees, 60 degrees, 30 degrees, and 15 degrees along the sun's vertical and along the meridians at 45 degrees and 90 degrees azimuth angle to the sun's vertical. The essential parts of the spectrophotometer applied for this investigation are described. The method of measurement and evaluation is discussed. The results are presented in two main tables giving the values of intensity and polarization as well as the time and the values of solar altitude and airmass for each measurement taken. The results on solar intensity are examined in dependence on airmass and the apparent values of extra-terrestrial intensity and of optical thickness are determined for each measuring series. (Author)