Accession Number : AD0650840

Title :   EXPERIMENTAL TESTING OF THE IMPROVED 3-PULSE INTERROGATION SIDE LOBE SUPPRESSION SYSTEM.

Descriptive Note : Final rept.,

Corporate Author : NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J

Personal Author(s) : Spingler,George F.

Report Date : NOV 1965

Pagination or Media Count : 49

Abstract : Experimental testing of an Improved 3-Pulse Interrogation Side Lobe Suppression (SLS) System was conducted to determine system performance characteristics and suitability for operational use. The Improved 3-Pulse SLS System was designed to increase the signal level of the first interrogation pulse (P sub 1) received by an aircraft transponder and thereby minimize transponder replies to interrogations from reflections. A method of transmitting the interrogation pulse from the Radar Beacon System omni-directional and directional antenna was developed. The proper interrogation pulse level required to be radiated from the omni-directional antenna to obtain proper suppression of reflected replies was determined by tests. In addition, the adaptability of the modified Air Traffic Control Beacon Interrogation Transmitter (ATCBI-3) to the Improved 3-Pulse SLS System was also analyzed and a field trial of the system was accomplished. It was concluded that the Improved 3-Pulse SLS System is effective in reducing the quantity of transponder replies to interrogations resulting from reflections and is suitable for application in the Air Traffic Control Radar Beacon System. (Author)

Descriptors :   (*SUPPRESSORS, AIRPORT RADAR SYSTEMS), ANTENNA LOBES, RADAR EQUIPMENT, RADAR BEACONS, AIR TRAFFIC CONTROL SYSTEMS, RADAR REFLECTIONS

Subject Categories : Electrical and Electronic Equipment
      Air Navigation and Guidance
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE