Analyse
Cet article dresse le bilan des connaissances actuelles sur le rayonnement électromagnétique à très haute fréquence des éclairs. Après une analyse phénoménologique de nouveaux résultats provenant des campagnes d’études des éclairs déclenchésTRIP82 au Nouveau-Mexique et Saint-Privat-d’Allier 83 en Haute-Loire,les auteurs présentent une caractérisation spectrale et temporelle des rayonnements métriques et décimétriques,exploitable pour la compatibilité électromagnétique des systèmes. A partir d’une synthèse des apports théoriques et expérimentaux, ils proposent ensuite une réflexion sur les processus de formation de réclair et sur les mécanismes générateurs du rayonnement des décharges orageuses.
Abstract
This article presents the result of the current knowledge on the very high frequency electromagnetic radiation of lightning. A phenomenology analysis of the new results obtained from the study of triggered lightning in New Mexico (TRIP82) and at Saint-Privat-d’ Allier in Haute-Loire, France (1983) is first described. The authors then present the spectral and temporal characteristics of theVHF/UHFradiation which can be applied to the electromagnetic compatibility of systems. From a synthesis of the experimental and theoretical contributions, they propose a reflection on the lightning initiation process and on the mechanisms generating lightning radiation.
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le Boulch, M., Hamelin, J. Rayonnement en ondes métriques et décimétriques des orages. Ann. Télécommun. 40, 277–313 (1985). https://doi.org/10.1007/BF03004503
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DOI: https://doi.org/10.1007/BF03004503
Mots clés
- Foudre
- Onde métrique
- Onde décimétrique
- Emission radioélectrique
- Décharge atmosphérique
- Décharge nuage nuage
- Décharge nuage sol
- Etude théorique
- Etude expérimentale
- Caractéristique spectrale
- Caractéristique temporelle
- Source rayonnement