Observations of the ionosphere in the equatorial anomaly region using WISS during the total solar eclipse of 22 July 2009 |
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| Authors: | Xinmiao Zhang Zhengyu Zhao Yuannong Zhang Chen Zhou |
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| Institution: | 1. Department of Geophysics, Arctic and Antarctic Research Institute, 38, Bering str., St. Petersburg 199397, Russia;2. University of Leicester, Department of Physics and Astronomy, Leicester LE1 7RH, UK;3. EISCAT Scientific Association, Kiruna, SE-961 28, Sweden;1. Centre of Studies in Resources Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India;2. Indian Institute of Geomagnetism, Mumbai 400005, India;3. Indian Institute of Geomagnetism, Navi Mumbai 410218, India;1. Institute of Space Sciences, National Central University, Chung-Li 32054, Taiwan;2. Indian Institute of Geomagnetism, Mumbai, India;3. Applied Mathematics, University of Sheffield, Sheffield, UK;1. Center for Space Sciences and Engineering and Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA, 24061, United States;2. Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, United States;3. GATS Inc., Newport News, VA 23606, United States;4. Computational Physics Inc., Boulder, CO 80301, United States;5. Center for Atmospheric Sciences, Hampton University, Hampton, VA 23668, United States |
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| Abstract: | An exceptionally long total solar eclipse occurred over the Yangtze River Basin in the mid-latitudes of China on 22 July 2009. The moon’s umbral shadow crossed through the ionospheric equatorial anomaly region. During the solar eclipse, new ionospheric behaviors were observed using a multi-station sounding approach. These new phenomena include: (1) visible Doppler spreading of F layer echoes at multiple group distances during the solar eclipse period, (2) strong ionospheric response near the peak of the northern equatorial anomaly crest and (3) synchronous oscillations in the Es and F layer during the recovery phase of the solar eclipse. |
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