The invention discloses a Beidou user
machine high-precision time service and positioning method based on a low-
orbit high-stability reference, and relates to the field of vehicle-mounted
electronic communication. The method comprises the following steps: firstly, receiving a low-
orbit satellite time service
signal through an SBOX, generating a high-stability time service reference
signal through anti-interference enhancement and
delay compensation, and transmitting the high-stability time service reference
signal to a Beidou user
machine; the Beidou user
machine calibrates drifting and fluctuation of an original time service signal of the Beidou user machine according to a low-
orbit high-stability time service reference, Beidou high-precision and low-orbit high-stability time service output is achieved through double-source fusion, and finally high-precision positioning calculation is completed and packaged into CAN data; and finally, the information is transmitted to a vehicle-mounted information unit through a vehicle-mounted
CAN bus, so that navigation and position reporting are realized. According to the invention, the high stability of the
low earth orbit satellite and the high precision of the Beidou are complemented and cooperated, the time service precision and continuity are considered through Kalman filtering fusion and extended Kalman positioning solution, the problems of insufficient stability and poor equipment
collaboration of a traditional Beidou user machine are solved, and the high stability and precision requirements of military and commercial use are met.