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Variation of attenuation and space diversity with elevation angle on 12 GHz satellite-to-ground radio paths

Variation of attenuation and space diversity with elevation angle on 12 GHz satellite-to-ground radio paths

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The results of a 6°-elevation-angle space-diversity experiment at a frequency of 11.6 GHz are reported, and is a comparison made with earlier results obtained by using the same sites at an elevation angle of 29.5°. For a given percentage time, more than double the path attenuation was measured at the lower elevation angle. Methods of predicting the attenuation and diversity gain at the lower elevation angle are discussed.

References

    1. 1)
      • I.M. Greenan , J.E. Allnutt , I.M. Richmond . The RSRS ground stations for receiving 11.6 GHz transmissions from the SIRIO satellite Propagation of radio waves at frequencies above 10 GHz. IEE Conf. Publ , 108 - 115
    2. 2)
      • D. Turner . Variation of tropospheric slant-path attenuation in the UK at 11.75 17GHz4. Electron. Lett. , 453 - 454
    3. 3)
      • Harrold, T.W.: `The structure of precipitation systems—a review', Paper R.4.1, IUCRM colloquium on the fine scale structure of precipitation EM propagation, October 1973, 1, Nice.
    4. 4)
      • D.B Hodge . The characteristics of millimetre wavelength satellite-to-ground space-diversity links ‘Propagation of radiowaves at frequencies above 10 GHz’. IEE Conf. Publ. , 28 - 32
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      • E.E. Altshuler , V.J. Falcone , K.N. Wulfsberg . Atmospheric effects on propagation at millimetre wavelengths. IEEE Spectrum , 83 - 90
    6. 6)
      • Bartholome, P.: `Model of atmospheric attenuation for Earth/satellite links at 11 14GHz', EC/3444/PB, ESRO Document, 1973.
    7. 7)
      • Evans, H.W.: `Attenuation on Earth-space paths at frequencies up to 30 GHz', ICC-71, Montreal, Canada, p. 27-1–27-5.
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