Rocket measurements of nitric oxide in the equatorial region |
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| Institution: | 1. Radio Science Division, National Physical Laboratory, New Delhi-110012, India;2. Department of Earth and Planetary Physics, Faculty of Science, University of Tokyo, Bunkyo-ku, Tokyo-113, Japan;1. Department of Endocrinology and Metabolism, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, China;2. Department of Pediatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, China;1. School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, 750021, PR China;2. Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan, 750021, PR China;3. Key Laboratory for Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, 750021, PR China;1. CONSTRUCT-LESE, Department of Civil Engineering, Faculdade de Engenharia da Universidade do Porto, Portugal;2. RISCO – School of Technology and Management, Polytechnic Institute of Leiria, Portugal;1. Graduate Program in Food Science, College of Pharmacy, Federal University of Bahia, Salvador, Brazil;2. Graduate Program in Pharmacy, College of Pharmacy, Federal University of Bahia, Salvador, Brazil;3. Laboratory of Toxicology, College of Pharmacy, Federal University of Bahia, Salvador, Brazil |
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| Abstract: | Measurements of nitric oxide (NO) concentrations were carried out from Thumba, India, using rocket-borne radiometers. The technique of measurement is based on the detection of day-glow emissions of the NO gamma (1,0) band. The results obtained are presented in this paper. The peak NO concentration shows a very good correlation with integrated value of the solar X-ray flux in the 0.1–0.8 nm band, thereby indicating the influence of the X-ray flux on the NO concentration. The observed variability of NO is thought to be mainly due to solar activity and partly due to different X-ray flux values on the days of the flights. Theoretical model calculations for rocket flight conditions were found to be in fairly good agreement with the observed profiles. The differences below 90 km altitude in the NO profiles are thought to be due to eddy turbulence. This model is also used to study changes in the NO concentration with solar activity and latitude. |
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