Cumulative crosspolarisation and canting angle distributions

Using measured crosspolarisation against attenuation measurements at 11.6 GHz in three polarisation states over a three-year period and a theoretical rain model, long-term canting-angle statistics are derived. A Gaussian distribution in the normal propagation plane with mean 8.5° and standard deviation 43°, together with a rotation of this plane by an angle determined by the prevailing wind condition, is found to fit the data. This may be used to predict long-term cross-polarisation statistics.