1) The satellite timing system uses the time sent by the satellite as the clock source of the first-level server, and uses the serial communication interface to obtain the satellite time. The error is in the millisecond level, which is accurate and reliable;
2) The cost of the entire network is low, and only the GPS hardware device as a clock source needs to be added;
3) The timing system has greater flexibility. The network level can be adjusted according to the actual traceability system structure and existing network conditions, and the devices connected to the network can be added or reduced at any time without any impact on the host;
4) The system runs in a many-to-many mode, one server corresponds to multiple clients, and one client can also correspond to multiple servers;
