Accession Number : AD0915626

Title :   Feasibility Study of the Wavefront Sampling Technique for GCA Application.

Descriptive Note : Final rept. May 72-May 73,

Corporate Author : TELEDYNE/MICRONETICS SAN DIEGO CA

Personal Author(s) : Weisbrod, Steven ; Hicks, Philip A. ; Morgan, Lee A.

Report Date : OCT 1973

Pagination or Media Count : 106

Abstract : The study reported here was an experimental effort to establish the feasibility of utilizing the Wavefront Analysis through Spatial Sampling (WASS) to upgrade the Ground Control Approach capabilities to handle incoming aircraft under conditions of near zero visibility. The WASS operates on the principle of measuring spatial variation of the amplitude and phase of the incident wavefront and using this information to resolve and identify the amplitudes, relative phases, and angles of arrival of the direct and the ground-reflected components of the incident signal. The WASS technique can be used passively by making use of transmissions from the aircraft, or actively, by making use of skin reflection from a radar. The experiments described in this report were performed at 3,000 MHz over water. Both pulsed and CW signals were utilized and the experimental results were most encouraging.

Descriptors :   *DIRECTION FINDING), (*GROUND CONTROLLED APPROACH RADAR, PHASED ARRAYS), (*AIRCRAFT LANDINGS, INFORMATION THEORY, SAMPLING, WAVEFORMS, ANGLE OF ARRIVAL, RADAR TRACKING, ANTENNA RADIATION PATTERNS, L BAND, X BAND, LOW ALTITUDE, INTERFEROMETERS, RADAR ANTENNAS, MULTIPATH TRANSMISSION, COMPUTERIZED SIMULATION, HORN ANTENNAS, FEASIBILITY STUDIES.

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE