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Cross-polarization measurements at Martlesham Heath (UK) using OTS

Mesures de Transpolarisation Réalisées a L’aide du Satellite OTS a Martlesham Heath (UK)

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Slant-path propagation measurements using transmissions to and from theOtssatellite are being carried out at Martlesham Heath (Uk)at an elevation angle of 29.9°. The measurements allow the determination of the attenuation and cross-polarization for circularly-polarized signals at 14.5 and 11.8 GHz and attenuation and cross-polarization for a linearly-polarized signal at 11.6 GHz. This paper reports the results of cross-polar measurements made during the summer of 1978 together with examples of particularly severe cross-polar effects from 1979. The measurements are compared with both aCcircurve relating cross-polar discrimination to fade depth for rain and theoretical curves supplied by Essex University. The results clearly demonstrate the superior cross-polar performance of linear polarization compared to circular polarization.


Ces mesures de propagation oblique sont actuellement effectuées avec un angle de site de 29.9°. On détermine ainsi l’affaiblissement et le découplage de polarisation pour des signaux à polarisation circulaire de 14,5 GHz et 11,8 GHz ainsi que pour un signal à polarisation rectiligne de 11,6 GHz. On présente des résultats de mesures de la transpolarisation effectuées pendant l’été 1978 ainsi qu’en 1979. Ces résultats sont comparés avec une courbe duCcirreprésentant le découplage en fonction de la profondeur d’évanouissement due à la pluie puis avec des courbes théoriques fournies par l’université d’Essex. Ils montrent que la polarisation rectiligne est plus importante que la polarisation circulaire en ce qui concerne la transpolarisation.

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Correspondence to Robert G. Howell.

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Howell, R.G., Thirlwell, J. Cross-polarization measurements at Martlesham Heath (UK) using OTS. Ann. Télécommun. 36, 117–125 (1981). https://doi.org/10.1007/BF02997014

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Key words

  • Wave propagation
  • Centimetric wave
  • Satellite communication
  • Wave attenuation
  • Cross-polarization
  • Rain
  • Hydrometeor
  • Experimental study

Mots clés

  • Propagation onde
  • Onde centimétrique
  • Télé-communication par satellite
  • Affaiblissement onde
  • Transpolarisation
  • Pluie
  • Hydrométéore
  • Etude expérimentale