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Detailed Reference Information |
Lathuillere, C., Hubert, D., La Hoz, C. and Kofman, W. (1991). Evidence of anisotropic temperatures of molecular ions in the auroral ionsphere. Geophysical Research Letters 18: doi: 10.1029/90GL02584. issn: 0094-8276. |
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Using incoherent scatter measurements obtained from Kiruna and Sodankyl¿ EISCAT remote stations, and corresponding to different aspect angles, we show, for the first time, anisotropic temperatures of molecular ions. The electric field obtained for the 5 hours period of the 2nd February 1990 experiment presented here range from 20 to 50 mV/m. We show that the line of sight ion temperature deduced from Kiruna incoherent scatter spectra is larger than the one deduced from Sodankyl¿ spectra which correspond to a smaller aspect angle. A statistical approach has been chosen to evaluate a &bgr;s parameter for Sodankyl¿ measurements which describes the anisotropy. We found a value of 0.60¿0.02 which compares very well with values inferred from theoretical studies. ¿ American Geophysical Union 1991 |
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BACKGROUND DATA FILES |
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Abstract |
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Keywords
Ionosphere, Auroral ionosphere, Ionosphere, Ionosphere-magnetosphere interactions, Ionosphere, Plasma temperature and density |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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