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A method to estimate statistics of rain depolarization

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Abstract

This paper is concerned with depolarization caused by rain due to nonsphericity of drops and the distribution of their axes orientations. The drops are assumed to be oblate spheroids having canting angles distribution obtained by Saunders. Differential phase shift as well as differential attenuation is important in the calculation of depolarization and the values proposed by Oguchi and Hosoya are utilized. In the first part expression to calculate depolarization amount for a uniform precipitation rate are presented. But communication engineers are usually interested on statistical variations of depolarization amount, so the second part of this paper is concerned with statistical distribution of depolarization. The rain cell proposed by Misme and Fimbel is used to describe the rain model over a path. If the precipitation rate distribution is known in one point of the path, the depolarization distribution is obtained by assuming only one rain cell along the path where, for a long time observation, the precipitation rate distribution for all points is the same.

Analyse

Cet article analyse la dépolarisation par la pluie due à la nonsphéricité des gouttes et à la distribution des orientations de leurs axes. On suppose que les gouttes sont des sphéroïdes aplatis dont les angles d’inclinaison obéissent à la distribution de Saunders. Pour la rotation différentielle de phase et l’affaiblissement différentiel qui sont également importants dans le calcul de la dépolarisation, on utilise les valeurs proposées par Oguchi et Hosoya. Dans la première partie on présente les expressions de la dépolarisation due à une précipitation uniforme. La deuxième partie analyse la distribution statistique de la dépolarisation, d’un plus grand intérêt pour les ingénieurs chargés des télécommunications. La cellule de pluie proposée par Misme et Fimbel est utilisée pour décrire le modèle de pluie sur un trajet. Si la répartition de l’intensité de précipitation est connue en un point, la répartition de la dépolarisation est obtenue en supposant une seule cellule de pluie dans un trajet le long duquel la répartition de la précipitation serait la même qu’en ce point pour un temps d’observation suffisamment long.

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References

  1. Saunders (M. J.). Cross polarization at 18 and 30 GHz due to rain.I.E.E.E. Trans. AP, U. S. A. (1971),19, n∘ 2, pp. 273–277.

    Google Scholar 

  2. Thomas (D. T.). Cross polarization distortion in microwave radio transmission due to rain.Radio Sci., U. S. A. (1971),6, n∘ 10, pp. 833–839.

    Article  Google Scholar 

  3. Evans (B. G.), Troughton (J.). Calculation of cross polarization due to precipitation.I.E.E. Conference Publication n∘98, UK (1973), pp. 162–171.

  4. Watson (P. A.),Arbabi (M.). Rainfall cross polarization at microwave frequencies.Proc. I.E.E., UK, U. S. A. (1973),120, n∘ 4, pp. 413–418.

    Google Scholar 

  5. Chu (T. S.). Rain-induced cross polarization at centimeter and millimeter wavelengths.Bell Syst. tech. J., U. S. A. (1974),53, n∘ 8, pp. 1 557–1 579.

    Google Scholar 

  6. Oguchi (T.),Hosoya (Y.). Differential attenuation and differential phase shift of radio waves due to rain: calculations at microwave and millimeter wave regions.J. Recherch. atmosph., Fr. (1974),8, n∘ 1-2, pp. 121–128.

    Google Scholar 

  7. Attisani (A.),Capsoni (C.),Paraboni (A.). Effects of non-spherical hydrometeors on E. M. propagation through atmospheric precipitation.J. Recherch. atmosph., Fr. (1974),8, n∘ 1-2, pp. 137–145.

    Google Scholar 

  8. Wiley (P. H.),Stutzman (W. L.),Bostian (C. W.). A new model for rain depolarization.J. Recherch. atmosph., Fr. (1974),8, n∘ 1-2, pp. 147–153.

    Google Scholar 

  9. McCormick (G. C.),Hendry (A.). Polarization properties of transmission through precipitation over a communication link.J. Recherch. atmosph., Fr. (1974),8, n∘ 1-2, pp. 175–187.

    Google Scholar 

  10. Watson (P. A.), Arbabi (M.). Rainfall cross polarization comparison of theory and measurements. Preprints of the papers presented at theIUCRM Colloquium. Nice, Fr. (1973).

  11. Evans (B. G.),Thompson (P. T.). Cross polarization due to precipitation at 11.6 GHz.J. Recherch. atmosphér., Fr. (1974),8, n∘ 1-2, pp. 129–136.

    Google Scholar 

  12. Semplak (R. A.). Effect of oblate raindrops on attenuation at 30.9 GHz.Radio Sci., U. S. A. (1970),5, n∘ 3, pp. 559–564.

    Article  Google Scholar 

  13. Assis (M. S.), Einloft (C. M.). A simple method for estimating rain attenuation.Proc. of the Open Symposium of URSI Commission F, Fr. (1977), pp. 301–303.

  14. Misme (P.),Fimbel (J.). Détermination théorique et expérimentale de l’affaiblissement par la pluie sur un trajet radioélectrique.Ann. Télécommunic., Fr. Fr. (1975),30, n∘ 5-6, pp. 149–158.

    Google Scholar 

  15. Shimba (M.),Morita (K.),Akeyama (A.). Radio propagation characteristics due to rain at 20 GHz band.I.E.E.E. Trans. AP, U. S. A. (1974),22, n∘ 3, pp. 507–509.

    Google Scholar 

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Authors and Affiliations

  1. C.E.T.U.C., Catholic University, Rua Marquès de Sao Vicente, 209, Gavea, 20000, Rio de Janeiro, Brazil

    Marlene S. Pontes

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  1. Marlene S. Pontes
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Pontes, M.S. A method to estimate statistics of rain depolarization. Ann. Télécommunic. 32, 372–376 (1977). https://doi.org/10.1007/BF03003481

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  • DOI: https://doi.org/10.1007/BF03003481

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