GNSS Fault Detection and Exclusion Algorithm for Single Frequency Receivers

Global Navigation Satellite Systems are widely used in numerous industries for positioning, navigation, and timing applications. Nevertheless, there are multiple factors that affect its positioning and dilute its overall accuracy. GNSS performance is characterized by four parameters which include Availability, Continuity, Accuracy, and Integrity. To ensure the best performance, integrity of the system is one of the most important factors to be monitored. In this paper we’ve proposed an integrity monitoring algorithm for single frequency GNSS receivers that detects and identify faulty measurements. Once the faulty satellite is identified, it is excluded from the measurements to ensure reliable outputs. Finally, the results of before and after the exclusion of faulty satellites are compared to ensure positioning accuracy.