Abstract
The theory is presented for one method of determining the effective polarization parameters of rain from propagation measurements over a line-of-sight link. The method requires the transmission of orthogonal linearlypolarized signals and a set of three amplitude and two relative phase measurements. Approximate equations are given for determining both instantaneous and «statistical parametric» values of the effective parameters in a twoparameter Gaussian model of the raindrop canting angle distribution. The instantaneous values could be useful for comparison with in-situ measurements, while the statistical parametric values are required for prediction of rain depolarization statistics.
Analyse
L’auteur présente une méthode théorique de calcul des paramètres équivalents de la pluie, à partir de mesures de la propagation sur une liaison en visibilité directe. La méthode exige la transmission de signaux orthogonaux en polarisation rectiligne et un jeu de trois mesures d’amplitude et de deux mesures de phase. Des formules approximatives permettent de déterminer la valeur instantanée des paramètres équivalents et leur valeur statistique paramétrique correspondant à un pourcentage donné du temps selon un modèle normal à deux paramètres de la distribution des angles d’inclinaison des gouttes de pluie. Les valeurs instantanées pourraient permettre des comparaisons avec des mesures in situtandis que les valeurs statistiques paramétriques sont nécessaires à la prévision statistique de la dépolarisation due à la pluie.
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References
Nowland (W. L.),Olsen (R. L.),Shkarofsky (I. P.). Theoretical relationship between rain depolarization and attenuation.Electron. Letter, UK (1977),13, n∘ 22, pp. 676–678.
***. Techniques for the prediction of rain depolarization statistics at microwave and millimetre wavelengths. ccir doc. 5/206, Canada (20 May 1977).
Olsen (R. L.),Nowland (W. L.). Semi-empirical relations for the prediction of rain depolarization statistics: their theoretical and experimental basis.Proc. of the International Symposium on Antennas and Propagation, Sendai, Japan (1978), pp. 477–480.
Olsen (R. L.). Cross polarization on terrestrial links. A review,URSI Commission F International Symposium on “Effects of the lower atmosphere on radio propagation at frequencies above 1 GHz ”, Lennoxville, Canada (1980).
Oguchi (T.). Scattering properties of Pruppacher-and-Pitter form raindrops and cross-polarization due to rain: calculations at 11, 13, 19.3, and 34.8 GHz.Radio Sci., USA (1977),12, n∘ 1, pp. 41–51.
***. Propagation data required for line-of-sight telecommunication systems, International Telecommunication Union. ccir report 338-3, Geneva, Switzerland (1978), V, pp. 185–199.
***. Propagation data required for space telecommunication systems, International Telecommunication Union. ccir report 564-1, Geneva, Switzerland (1978), V, pp. 219–239.
Van Cappellen (J.),Mawira (A.),Neesen (J.),Zelders (F). Joint statistics of attenuation and cross-polarization measured with the OTS satellite, NATO/AGARDConference Preprint on “Propagation Effects in Space/Earth Paths ”,North Atlantic Treaty Organization, Paris, France (1980), n∘ 284, pp. 15/1-10.
Delogne (P.),Sobieski (P.), Fine structure of microwave cross-polarization due to precipitation,Ann. Télécommunic., Fr. (1977),32, n∘s 11–12, pp. 377–385.
Cox (D. C.). Some effects of measurement errors on rain depolarization experiments,Bell Syst. tech. J., USA (1975),54, n∘ 2, pp. 435–450.
Beckmann (P.). The depolarization of electromagnetic waves,The Golem Press, Boulder, USA (1968).
Kheirallah (H. N.),Knight (J. P.),Olsen (R. L.),McCormick (K. S.),Segal (B.). Frequency dépendance of effective path length in the prediction of rain attenuation statistics.Electron. Letter, UK (1980),16, n∘ 12, pp. 448–450.
Capsoni (C.),Fedi (F.),Maggiori (D.),Paraboni (A.). A model-oriented approach to measure rain-induced cross-polarization.Ann. Telecommunic., Fr. (1981),36, n∘ 1–2, pp. 154–159.
Watson (P. A.). Crosspolarization measurements at 11 GHz.Proc. IEE, UK (1976),123. n∘ 7, pp. 667–675.
Saunders (M. J.). Cross polarization at 18 and 30 GHz due to rain,IEEE Trans. AP., USA 1 (1971),19, n∘ 2, pp. 273–277.
Brussaard (G.). A meteorological model for rain-induced cross polarization,IEEE Trans. AP., USA (1976),24, n∘ 1, pp. 5–11.
McCormick (G. C.),Hendry (A.). Principles for the radar determination of the polarization properties of precipitation,Radio Sci., USA (1975),10, n∘ 4, pp. 421–434.
McCormick (G. C.),Hendry (A.). Polarization properties of transmission through precipitation over a communication link,J. Rech. Atmosph., Fr. (1974),8, n∘s 1–2, pp. 175–187.
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Communication présentée au Colloque de la Commission F de l’URSI à Lenoxville (Canada) en mai 1980 «Effects of the lower atmospheric on radio propagation at frequencies above 1 GHz».
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Olsen, R.L. Theory for measuring the effective polarization parameters of rain from orthogonal linearly-polarized transmissions. Ann. Télécommun. 36, 471–476 (1981). https://doi.org/10.1007/BF03000027
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DOI: https://doi.org/10.1007/BF03000027