Analysis of Results of Spectrophotometric Measurement of the Crepuscular Halo of Terrestrial Atmosphere from 'Soyuz-5 ' Spaceship

摘要

The analysis permits the estimate of optimum possibilities of using photographic and spectrophotometric measurement of crepuscular atmosphere from space ships to obtain the vertical profile coefficient of aerosol scattering. As was shown at small approach angles of the sun behind the horizon the vertical gradients of brightness of the crepuscular atmosphere are absent. With increase angle of the sun behind the horizon the intensity of scattered light decreases, and saturation of tones of the color picture decreases; on curves of monochromatic brightness there appear characteristic discontinuities and minima. During the solution of inverse problems of space atmospheric optics, colormetric analysis of obtained optical data should be combined with the analysis of the amount of depression on curves of monochromatic brightness of the crepuscular halo, depending upon the volume concentration of aerosol at various heights, conditions of illumination of crepuscular atmosphere by direct solar radiation, geometry of sighting, and orbit height of the spaceship. (Author)