Accession Number : AD0715335

Title :   An Extension of Nonsynchronous Interrogation Repetition Frequency Selection Methods,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Gardner,W. K.

Report Date : NOV 1970

Pagination or Media Count : 38

Abstract : Consideration of the timewise occupancy within the overall period band due to initial choices of nonsynchronous Interrogation Repetition Frequencies (IRF's) for application to radar beacon systems results in the ability to determine as well the open time slots remaining for succeeding choices. Thus all possible succeeding choices that could become members of a particular nonsynchronous IRF set can be located. A simple method has been found for progressively locating by computer all open slots (integer period values) for each next choice of a given nonsynchronous IRF set. The blocked/open slot concept further results in a detailed understanding of the effects upon the selection process of changes in the parameter n, the number of interrogations, and the parameter delta, the dead time of a transponder, and explains the great dependency upon n and delta of the total number of available nonsynchronous IRF's. (Author)

Descriptors :   (*RADAR BEACON, FREQUENCY), AIR TRAFFIC CONTROL SYSTEMS, IDENTIFICATION SYSTEMS, SELECTION

Subject Categories : Air Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE