Accession Number : ADD015924

Title :   All-Weather Precision Landing System for Aircraft in Remote Areas.

Descriptive Note : Patent, Filed 24 Jul 90, Patented 4 May 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Hart, Gerald E

Report Date : 04 May 1993

Pagination or Media Count : 16

Abstract : An all-weather aircraft landing system includes a plurality of ground based passive 90 deg dihedral reflectors for producing two-bounce reflected signals without ground reflections, and an airborne radar system which may transmit and receive same sense circularly polarized radiation, while completely rejecting opposite sense polarization returns or else utilizing them to indicate weather conditions. Radar clutter from objects such as rain, buildings and trees which produce opposite sense reflections are rejected by the same sense receiver or switched to an opposite sense receiver to provide weather/obstacle condition information. By properly orienting a plurality of 90 deg dihedral angle reflectors of a particular size in a predetermined array pattern and tilt-angle adjacent a runway, the reflections from airborne radar signals are processed and displayed to provide a visual means for determining glide slope deviation and approach vector of the landing aircraft.

Descriptors :   *AIRCRAFT LANDINGS, *ALL WEATHER, *PATENTS, AIRBORNE, BUILDINGS, GROUND BASED, LANDING, POLARIZATION, RADAR CLUTTER, REFLECTION, TREES, RADAR LANDING CONTROL, REMOTE AREAS

Subject Categories : Military Aircraft Operations

Distribution Statement : APPROVED FOR PUBLIC RELEASE