The high-latitude lower ionosphere observed by EISCAT |
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| Institution: | 1. EISCAT, Ramfjordmoen, 9027 Ramfjordbotn, Norway;2. EISCAT, Box 705, S-981 27 Kiruna, Sweden;1. Monash University, Malaysia;2. KN Toosi University of Technology, Tehran, Iran;3. Electrical Engineering Department, Amirkabir University of Technology, Tehran, Iran;1. Department of Physics, Alipurduar University, Alipurduar, West Bengal, India;2. Fundamental Plasma Experiments Division, Institute for Plasma Research, Bhat, Gandhinagar, India;3. Department of Physics, College of William and Mary, Williamsburg, Virginia, USA;4. Department of Physics, Alipurduar College, North Bengal University, Alipurduar, West Bengal, India;1. Department of Physics, University of Kashmir, Srinagar, India;2. National Atmospheric Research Laboratory, Dept. of Space, India |
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| Abstract: | Routine observations of lower ionosphere electron densities are now available from the EISCAT radar facility. High resolution (3km in altitude) power profile measurements are obtained from the altitude interval 55 to 170km for approximately 400 hours per year, collected during a series of continuous periods of operation of 24 or more hours at a time. Variations of D and E-region electron densities are presented, as a function of solar-zenith angle during quiet conditions, and as a function of simulated 30MHz riometer absorption during disturbed conditions. |
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