Performance assessment of GNSS in train control system

Global Navigation Satellite Systems (GNSS) have been widely used in safety-related applications, for example, railway train control systems. Starting from the application of GNSS technology in railway train location, this paper analyzes the necessity of GNSS performance assessment based on the actual needs of train positioning. First, the application status of GNSS in train positioning at home and abroad is introduced. Second, the status quo of GNSS performance assessment is analyzed from four aspects: content of performance assessment, establishment of assessment benchmark, development of performance requirements standards and status of performance assessment. Finally, the development trend of GNSS performance assessment in China is analyzed, on basis of the integration of BDS emerging industry and the railway transportation system.