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OTS propagation measurements during thunderstorms

Mesures des propagations pendant des orages a l’aide du satellite OTS

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Abstract

Otspropagation measurements are described which comprise a complete determination of the incoming polarizations for both linearly and circularly polarized beacons. Auxiliary equipment includes radars, E-field sensors and a microphone array. General trends in the propagation data are discussed and two basic models are proposed for the observed correlations between electrostatic field and cross-polarization. A detailed analysis, with radar data, is now given for one thunderstorm. A method for the prediction of the linear cross-polarization from the circular is shown to work well for this ice-dominated event. Fast lightning-induced, cross-polar jumps are described, and by relating them to acoustic thunder location data, the physical models for particle alignment are discussed.

Analyse

On décrit des mesures de propagation avec le satelliteOtscomprenant la détermination complète des polarisations reçues, pour les balises à polarisation rectiligne ou circulaire. L’équipement auxiliaire comprend deux radars, deux capteurs de champ électrique et un réseau de microphones. On analyse les caractéristiques générales de la propagation, en présentant deux modèles pour des corrélations entre le champ électrostatique et la transpolarisation. Un orage est analysé en détail à partir des données des radars. Une méthode de prévision de la transpolarisation en polarisation rectiligne à partir de celle observée en polarisation circulaire convient bien à ce phénomène dominé par des particules de glace. Des sauts rapides entre polarisations croisées sont provoqués par les éclairs. En les identifiant parmi les données de localisation acoustique, on discute des modèles physiques d’alignement des particules.

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References

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Author information

Correspondence to Neil J. McEwan.

Additional information

On leave from Faculdade de Engenharia, Universidade do Porto (Portugal).

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McEwan, N.J., Alves, A.P., Poon, H.W. et al. OTS propagation measurements during thunderstorms. Ann. Télécommun. 36, 102–110 (1981). https://doi.org/10.1007/BF02997012

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Key words

  • Wave propagation
  • Centimetric wave
  • Satellite communication
  • Cross-polarization
  • Correlation
  • Electric field
  • Thunderstorm
  • Experimental study

Mots clés

  • Propagation onde
  • Onde centimétrique
  • Télécommunication par satellite
  • Transpolarisation
  • Corrélation
  • Champ électrostatique
  • Orage
  • Etude expérimentale