Interaction of roofing materials and Navaids signals

Conceptual Framework

The navaids signals originating from either ground or aircraft transponders are propagated into space. The maneuvering of the aircraft in space brings about variations in physical parameters of the propagation that include angle of incidence, state of polarization and transmission distance. This propagation encounters obstacles such as roofing materials whose effect may be to attenuate, reflect, diffract or vary radiation patterns of the transmitted signal. Such effects that alter the propagation parameters are bound to introduce errors in the signals received by the navaids equipment.