作者: Marcos A. Peñaloza-Murillo
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摘要: An investigation of the optical response atmosphere before, during, and afterthe total solar eclipse 26 February 1998 at Caribbean Peninsula Paraguana (Falcon State) in Venezuela, was made by measuring photometrically intensity sky brightness three strategic directions: zenith, horizon anti-parallel or opposite umbra path, perpendicular to this path. From these measurements, applying an inverse way empirical photometric model, very rough estimations theextinction coefficient, also average depth, were obtained one particular directions. However based on meteorological measurements such as those relative humidity temperature, a different better estimation visual global extinction coefficient (except horizon), considering contribution each component: atmospheric aerosol, water vapour, ozone Rayleigh scattering. It is shown that mostly dependent upon aerosol extinction. In spite strong reduction observed during totality, results show not dark. This confirmed for coefficient. Additionally it estimated took place Falcon State, beginning last century 3 1916, ∼30% darker eclipse, played relevant similar role scattering sunlight totality 1998's. Visual observations event, which length only two bright stars could be seen sky, support both eclipses.