Assessment of principal planes orientation in a terrestrial link at 18 GHz during intense rainfall

Simultaneous measurements of attenuation and depolarisation at 18 GHz collected during a propagation experiment on a 9.5 km terrestrial link have been employed to extract information about the angle formed by the principal planes with respect to the vertical-horizontal orientations (canting angle). Tilted polarisation planes have been adopted in order to increase the system sensitivity and to detect the sign of the angle according to a new technique recently devised.