초록 ▼

A guidance system for landing an aircraft is described which uses a source of signals identifiable with the aircraft and a ground station which is linked to the aircraft. Specifically, the ground station includes a receiver which is connected to one or more pairs of antennas having a fixed, overlapp

A guidance system for landing an aircraft is described which uses a source of signals identifiable with the aircraft and a ground station which is linked to the aircraft. Specifically, the ground station includes a receiver which is connected to one or more pairs of antennas having a fixed, overlapping, directional sensitive pattern symmetically located relative to the center of the landing path, a receiver and a processor for measuring the relative sensitivity of the signals received at the antennas and for using the relative signal intensity to determine the location of the aircraft relative to the center of the landing path.

대표청구항 ▼

A system for providing ground derived approach guidance for an aircraft for guiding the aircraft along an approach path toward a landing site, comprising: ground based means located near the landing site for transmitting signals toward an aircraft approaching the landing site; a plurality of ground

A system for providing ground derived approach guidance for an aircraft for guiding the aircraft along an approach path toward a landing site, comprising: ground based means located near the landing site for transmitting signals toward an aircraft approaching the landing site; a plurality of ground based fixed beam directional antennas disposed near the landing site oriented so that the fixed beams for the antennas overlap along the approach path; means for receiving signals received by said plurality of antennas from an aircraft in response to signals transmitted for the ground based transmitting means and comparing the relative amplitudes of the received signals to determine the position of the aircraft relative to the approach path; a transmitter located on board the aircraft, said transmitter being responsive to signals received from the ground based transmitting means for generating a reply transmission in response thereto for receipt by said fixed beam antennas, wherein said ground based transmitting means includes means for transmitting pulses and wherein said transmitter on board the aircraft is responsive to each pulse received from said ground based transmitting means for transmitting a plurality of pulses in response to each received pulses, wherein said receiving and comparing means is operative to receive a different one of said plurality of pulses on each of said plurality of antennas and to compare the amplitude of said received pulses.