Estimation of nighttime ionospheric D-region parameters using tweek atmospherics observed for the first time in the North African region
| Autor: | Ahmed Ammar, Hassen Ghalila |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Atmospheric Science
Low latitude 010504 meteorology & atmospheric sciences Ionospheric reflection Aerospace Engineering Astronomy and Astrophysics D region Geodesy 01 natural sciences Lightning Geophysics Space and Planetary Science 0103 physical sciences General Earth and Planetary Sciences Atmospherics North african Ionosphere Independent data 010303 astronomy & astrophysics Geology 0105 earth and related environmental sciences |
| Zdroj: | Advances in Space Research. 66:2528-2536 |
| ISSN: | 0273-1177 |
| DOI: | 10.1016/j.asr.2020.08.025 |
| Popis: | 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 ( h ′ and β ) 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). |
| Databáze: | OpenAIRE |
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