Autonomous Operation Technology of Global Navigation Satellite System Test technology of navigation satellite system Autonomous navigation principles and methods for Beidou navigation satellite system 并列题名：Autonomous navigation principles and methods for Beidou navigation satellite system Antennas for global navigation satellite systems 并列题名：Antennas for global navigation satellite systems Maritime application of BeiDou navigation satellite system Theory and applications of Beidou navigation satellite system Stiffness optimization technology of robotic machining system