Why is bounding GNSS errors under rare or anomalous conditions important, and what makes it difficult?
Estimating and quantifying errors in GNSS and other navigation user equipment is a common task and is important for understanding what roles or missions a given device is suitable for. Most users are familiar with the concept of accuracy, which is usually expressed as a bound on navigation error (relative to unknown truth) at a probability level between 0.5 and 0.95. This article expands on the concept of accuracy to estimate error bounds that are only violated with far smaller probabilities.
