Evaluation Model for Protocol Conformance of BDS D1 Navigation Messages

Abstract

Navigation messages are the basic data for navigation and positioning calculations in satellite navigation systems. Nowadays, there is a growing need to evaluate the protocol conformance of navigation messages. In this paper, the evaluation model and the calculation method for protocol conformance of BDS D1 navigation messages are proposed, and the example analysis of actual BDS D1 navigation messages is presented. The evaluation model is described from three aspects, including formatting conformance, verification conformance and quantization unit conformance. Every aspect is considered carefully with calculation and analysis. The results show that the model can evaluate the protocol conformance of BDS D1 navigation messages reasonably.