A New Minimal Detectable Bias in Fault Detection for Positioning

Abstract

The Minimal Detectable Bias method of Fault Detection is frequently employed to determine if a position has integrity. However, to provide integrity the Type I error probability of the statistical tests is required to be preset. Normally, this probability is set to avoid the unnecessary rejection of measurements or to satisfy the continuity requirements. In this paper, the Type I error probability is set based on the integrity requirements by initially setting the Protection Levels equal to the Alert Limit. This new procedure of setting the Type I error probability is compared with the more conventional approach when there are different continuity requirements and when multiple biases are considered. From the results of this comparison, it is concluded that the new procedure increases the availability rates regardless of the continuity requirements and the number of biases considered.