Rain fade slope predicted from rain rate data
Article first published online: 19 MAY 2007
Copyright 2007 by the American Geophysical Union.
Volume 42, Issue 3, June 2007
How to Cite
2007), Rain fade slope predicted from rain rate data, Radio Sci., 42, RS3006, doi:10.1029/2006RS003480.(
- Issue published online: 19 MAY 2007
- Article first published online: 19 MAY 2007
- Manuscript Accepted: 17 JAN 2007
- Manuscript Revised: 22 NOV 2006
- Manuscript Received: 15 FEB 2006
- fade mitigation techniques;
- fade slope;
- fade dynamics
 A key parameter of the statistics of the rate of change of rain attenuation (“fade slope”) on satellite links is the variance of relative fade slope. This paper shows how this parameter can be derived from rain rate measurements without the use of satellite beacon measurements. Relating rain rate directly to attenuation would give unrealistic results. A theoretical model to estimate the variance of relative fade slope is derived, using the integrating effect of rain rate variations along the propagation path and using as inputs several meteorological parameters only. The theoretical values are compared to measured results from a link in the United Kingdom at 50 GHz. The agreement is good on average and also in their correlation with the type of rain and with the rain height. With the wind speed, the theoretical values increase more strongly than the measured results, which may be due to the limited spatial resolution of the meteorological data.