United States Department of Transportation
i
Controller-reported performance defects in the air traffic control radar beacon system (1971 survey)
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1973-03-01
[PDF-10.01 MB]
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Edition:Final report; November 1971-December 1971
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Abstract:This report analyzes the returns from a recent ATC performance survey initiated by the Beacon System Interference Problem Subgroup. The survey began on the 27 November 1971 and lasted for two weeks. Participatione was limited to 37 facilities with problems considered representative of the entire system; included were enroute centers, civilian towers and military air traffic installations. Examination of the deficiency data revealed that the most common nationwide problem was the loss cf beacon ccverage for a short period of time. This is followed by broken target slash, ring around, loss of coverage for long time, and false targets. The returns are sorted to identify the type of aircraft involved in the reported discrepancies. For each aircraft the data is further refined on the basis of error category, and the performance summnarized by an error matrix. Attention is focused on the air carriers and the beacon discrepancies associated with this group are cartalogued. Air traffic statistics are derived and employed to normalize the discrepancy information. The resulting data reveals significant performance variation among the different air carriers, as well as between different aircraft. Finally, the manner in which the survey was conducted is discussed, and recommnendations made for automating future performance tests.
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