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Highlights First report of nighttime tweeks atmospherics observed in the Noth African region. Tweeks atmospherics are observed during a geomagnetically quiet period. Estimation of nighttime reflection height and equivalent electron density. Wait’ parameters (h′ and ) have been studied using tweeks atmospherics. Causative lightning distances to Tunis are obtained using a single-site technique.
Abstract Dispersive wave modes called tweek atmospherics produced by lightning strokes were observed using Stanford University designed AWESOME VLF receiver system installed at the University of Tunis El Manar, Tunisia (Geog. lat. 36.50 N; lon. 10.08 E). About 84 tweek atmospherics were analyzed during geomagnetically quiet days to provide important clues for estimating the effective ionospheric reflection height and electron density using the cut-off frequency of first modes. Variations of nighttime Wait ionospheric parameters ( and ) have been studied using tweeks observed for the first time at the low latitude station in the North African region. The distance of the lightning located in a range of 500–5000 km and the accuracy obtained by single-site technique had been estimated by a comparison with independent data from the World-Wide Lightning Location Network (WWLLN).
Estimation of nighttime ionospheric D-region parameters using tweek atmospherics observed for the first time in the North African region
Advances in Space Research ; 66 , 11 ; 2528-2536
2020-08-19
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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