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The effect of the 21 August 2017 total solar eclipse on the phase of VLF/LF signals
journal contribution
posted on 2020-02-01, 00:00 authored by A Rozhnoi, M Solovieva, S Shalimov, D Ouzounov, P Gallagher, G Verth, J McCauley, Sergiy ShelyagSergiy Shelyag, V FedunAn experimental study of the phase and amplitude observations of sub‐ionospheric very low and low frequency signals is performed to analyse the response of the lower ionosphere during the August 21, 2017 total solar eclipse in the United States of America. Three different sub‐ionospheric wave paths are investigated. The length of the paths varies from 2200 to 6400 km and the signal frequencies are 21.4 kHz, 25.2 kHz and 40.75 kHz. The two paths cross the region of the total eclipse and the third path is in the region of 40‐60% of obscuration. None of the signals reveal any noticeable amplitude changes during the eclipse while negative phase anomalies (from ‐33° to ‐95°) are detected for all three paths. It is shown that the effective reflection height of the ionosphere in low and middle latitudes is increased by about 3‐5 km during the eclipse. Estimation of the electron density change in the lower ionosphere caused by the eclipse, using linear recombination law, shows that the average decrease is by 2.1 to 4.5 times.
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Journal
Earth and space scienceVolume
7Issue
2Article number
e2019EA000839Pagination
1 - 7Publisher
American Geophysical UnionLocation
Washington, D.C.Publisher DOI
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2333-5084eISSN
2333-5084Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2019, The AuthorsUsage metrics
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