The benchmark station subsystem is the data source of the network RTK system, and the stability and reliability of this subsystem will directly affect the performance of the system. The functions and characteristics of the reference station subsystem include:

　　① The benchmark station is unmanned, with few equipment, reliable connection, uniform distribution, and stability;

　　② The reference station has the ability to save data, and the GNSS receiver memory can retain the original observation data of the past 7 days;

　　③ In case of power outage, the reference station can rely on its own UPS to support operation for more than 72 hours and alarm the center;

　　④ Automatically transmit GNSS observation data and other information to the management center through the network according to the set time interval;

　　⑤ Equipped with equipment integrity detection function, it automatically conducts periodic rounds of equipment inspection and reports any problems to the management center;

　　⑥ Equipped with automatic protection against lightning and surge;

　　⑦ The management center sets, controls, and detects the operation of the reference station through remote means.

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