Development of an acceptability window for a ground proximity avoidance system

An acceptability window for the F/FB/EF-111 aircraft has been developed which is based on pilots' subjective evaluations. As part of an overall evaluation of the F/FB/EF-111 GPWS (ground proximity warning system), subjective data were collected following the completion of each of a multitude of different configurations flown in an FB-111 simulator and analyzed using the multiple regression technique. The window of acceptability was developed using the minimum recovery altitude as a function of vertical velocity. The window was validated using performance data collected during the overall evaluation of the GPWS.<
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