DIFFRACTION OF ELECTROMAGNETIC WAVES ON A HALF-PLANE IN RELATION TO THE AIRCRAFT LANDING SYSTEM ON AIRFIELDS WITH A HIGH LEVEL OF SNOW COVER AND DIFFICULT TERRAIN IN THE APPROACH ZONE

Abstract

The research is aimed at providing the pilot or autopilot of the aircraft with safe information on the trajectory of the landing approach to airfields with difficult terrain. Short-wave asymptotic expansions of the diffraction field of a spherical wave on a wedge, which describe the field both far away and in the vicinity of the light-shadow boundaries,with an arbitrary orientation of the electric dipole relative to the edge of the half-plane, are obtained, uniform in the angular coordinates of the source and the observation point.
The influence of the diffraction of electromagnetic waves on the site of limited dimensions in front of the glide
path on the behavior of the approach trajectory of aircraft for landing is considered. The calculated results are
compared with the experimental results obtained by flight at the coastal airfield