Status and development of satellite navigation system based train positioning technology

Starting with the application advantages of global navigation satellite system technology in railway train positioning, principles and requirements of the satellite navigation system based train positioning were analyzed. Based on the current satellite navigation systems including GPS, GLONASS, GALILEO and Bei Dou Navigation Satellite System, application of satellite navigation based train positioning technology at home and abroad was roundly introduced.From the aspects of specific satellite navigation receiver design, multi-sensor information fusion, track map generation and assistance, and assurance of integrity and safety, main research progress of this field was summarized at the theoretical-methodological level. Finally, prospects of the future development were presented correspondingly.