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Measurements of visibility by photographic photometry at Seville (Spain)
Institution:1. The Higher Education Technical School of Professional Studies Kragujevac, Kosovska 8, Kragujevac, Serbia;2. University of Belgrade, The Faculty of Transport and Traffic Engineering, Vojvode Stepe 305, Belgrade, Serbia;1. Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai, China;2. Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen, China;3. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China;4. Guizhou Transportation Planning Survey & Design Co., Ltd, Guiyang, China;5. Department of Statistics and Data Science, Soutern University of Science and Technology, Shenzhen, China;1. School of Civil Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran;2. Department of Psychology, Norwegian University of Science and Technology (NTNU), Trondheim, Norway;1. School of Civil and Construction Engineering, Oregon State University, 211 Kearney Hall, Corvallis, OR 97331, United States;2. School of Civil and Construction Engineering, Oregon State University, 101 Kearney Hall, Corvallis, OR 97331, United States;3. Department of Civil and Environmental Engineering, Portland State University, Engineering Building, 1930 SW 4th Ave, Portland, OR 97201, United States;4. School of Economic Sciences, Washington State University, United States;1. CSIR- Central Road Research Institute, New Delhi 110025, India;2. Department of Civil Engineering, Birla Institute of Technology and Science, Pilani, Rajasthan 333031, India
Abstract:Determinations of meteorological range Vm were carried out at the city of Seville (Spain) during 1 year by photographing black objects—on the typical Giralda tower—against the adjacent sky and measuring on the negative the relative optical densities of the objects and the sky images by means of an automatic recording microdensitometer. The contrast of the film was also determined by density measurements on the negatives. Empirical relationships between Vm and atmospheric particulate contents M were also studied.
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