摘要:Peformance analysis of GNSS signal properties and components is well defined in the technical literature. Terms such as code tracking noise, multipath error envelopes, and S-curve bias, to name a few, are commonly accepted and widely used by scientists. However, the performance of GNSS data messages has yet to be fully assessed and compared. This article proposes well-defined “figures of merit” that can be used to better evaluate current and future GNSS system performance and presents sample analyses to demonstrate the authors’ methodology.