Pointing error definitions, metrics, and algorithms

This paper introduces pointing error definitions and metrics that are mathematically well-founded and ate meaningful to image quality and to other types of measurements. The definitions and metrics are accuracy, displacement, jitter, stability, and windowed stability. The metrics are time-domain and equivalent frequency-domain formulas. The frequency-domain formulas are particularly easy to apply. Useful metrics for displacement and jitter were introduced a decade ago but have not been utilized in requirements documents, and so they are reintroduced here. New definitions and metrics for stability and windowed stability are introduced in this paper.