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A simulation study of the effects of communication delay on air traffic control
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1990-09-01
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[PDF-7.08 MB]
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Edition:Final Report; Nov. 1989 - Aug. 1990
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Abstract:This study was conducted to examine the impacts of voice communications delays
characteristic of Voice Switching and Control System (VSCS) and satellite
communications systems on air traffic system performance, controller stress
and workload, and communications disruptions. To accomplish this a simulation
was developed and performed at the Federal Aviation Administration (FAA)
Technical Center. The simulation used scenarios constructed from records of
live air traffic at five adjacent Atlanta Air Route Traffic Control Center
(ARTCC) sectors. Nine full performance level air traffic control specialists
from the Atlanta ARTCC sectors simulated participated as subjects. Four delay
levels were employed corresponding to: current equipment with and without
satellite link, and VSCS with and without satellite. Three levels of
communications workload were used based on 70 percent, 90 percent, and 110
percent of reference values for the actual sectors. VSCS delays were not
found to have any statistically significant impact on any measure. Satellite
delays were found to be associated with a statistically significant increase
in one kind of communication disruption (step-ons) at the highest level of
communications workload used in the study.
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