Satellite observations of new particle and field signatures associated with SAR arc field lines at magnetospheric heights |
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| Institution: | 1. Hydrological Sciences (Code 617), ESSIC/NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA;2. Water and Environment Management Research Centre, Department of Civil Engineering, University of Bristol, Bristol BS8 1TR, United Kingdom;3. CIRA/National Oceanic and Atmospheric Administration (NOAA), College Park, MD, USA;4. Water Resources, Department of Civil Engineering, Indian Institute of Technology, Delhi, India;1. Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China;2. Faculty of Geo-Information Science and Earth Observation, University of Twente, Enschede, The Netherlands;3. Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China;4. Dipartimento di Ingegneria Civile e Ingegneria Informatica, Tor Vergata University, Rome, Italy;5. College of Atmospheric Sciences, Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information Technology, Chengdu, China;6. Swiss Federal Research Institute WSL, Birmensdorf, Switzerland;7. Gamma Remote Sensing AG, Gümligen, Switzerland;8. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, USA;9. Hydrological Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, USA;1. Department of Plant Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, P. R. China;2. Key Laboratory of Genetics and Fruit development, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu Province, P. R. China;1. Department of Civil and Environmental Engineering, Duke University, Durham, NC, USA;2. Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA |
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| Abstract: | Enhancements in thermal ion densities, an oxygen dominated ring current at energies below 17 kev, and invariant latitude-limited bands of intense ELF hiss have been discovered on Stable Auroral Red (SAR) arc field lines at magnetospheric heights. These new signatures were revealed by an examination of 31 coordinated data sets taken simultaneously at magnetospheric and ionospheric heights by the DE-1 and -2 satellites during SAR arc traversals within the period September 1981 through April 1982. Data sets from DE-2, for the first time, provide information on the location of a SAR arc (determined by the F region electron temperature enhancement) during the nearly simultaneous passage of these field lines by DE-1 in the magnetosphere. These new high altitude signatures are examined in the context of possible magnetospheric SAR arc energy source mechanisms. |
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