Ionospheric total electron content response to the Great American Solar Eclipse of 21 August 2017

Using a comprehensive database of similar to 4,000 ground-based Global Navigation Satellite Systems stations, we investigate the ionosphere's response to the 21 August 2017 solar eclipse. The high-resolution, two-dimensional maps of the ionospheric total electron content (TEC) were constructed using combined GPS and GLONASS measurements. Solar eclipse resulted in a continent-size TEC decrease with stronger effects up to 50% over the U.S. eastern coast. Along the totality path within an area of 75% obscuration TEC decreased by similar to 30-40%. We reveal a latitudinal dependence of the TEC response with equatorward expansion of TEC depletion. Recovery signature in the form of large-scale TEC enhancement up to 20-30% occurred in posteclipse period. Swarm and DMSP satellites encountered the eclipse-induced plasma density depletion and posteclipse increase at 450 km height and above. These effects were associated with downward plasma fluxes from topside ionosphere/plasmasphere and thermospheric changes.

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Author Cherniak, Iurii
Zakharenkova, Irina
Publisher UCAR/NCAR - Library
Publication Date 2018-02-05T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2023-04-14T21:05:05.021843
Metadata Record Identifier edu.ucar.opensky::articles:21486
Metadata Language eng; USA
Suggested Citation Cherniak, Iurii, Zakharenkova, Irina. (2018). Ionospheric total electron content response to the Great American Solar Eclipse of 21 August 2017. UCAR/NCAR - Library. Accessed 03 June 2023.

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