The Beidou Ground Based Augmentation System has now provided basic services. In order to better serve users, the China Satellite Navigation System Management Office has released the "Beidou Ground Based Augmentation System Service Performance Specification (Version 1.0)", which includes documents such as the "Beidou Ground Based Augmentation System National Data Comprehensive Processing System Data Processing Interface Specification", "Beidou Ground Based Augmentation System Based on China Mobile Communication Data Broadcast Interface Specification", and "Beidou Ground Based Augmentation System Based on China Mobile Multimedia Broadcasting (CMMB) Broadcast Interface Specification". Please refer to the Beidou Special Standard List officially published on the Beidou website.

The Beidou ground-based augmentation system is a major national information infrastructure used to provide enhanced positioning accuracy and integrity services for the Beidou satellite navigation system. The Beidou ground-based augmentation system consists of ground Beidou reference station system, communication network system, data comprehensive processing system, data broadcasting system, etc. The Beidou ground-based enhancement system receives the navigation signals sent by the Beidou navigation satellite through several fixed Beidou reference stations established at a certain distance on the ground, and transmits them to the data integrated processing system through the communication network. After processing, it generates the precise orbit and clock offset of the Beidou navigation satellite, the ionosphere correction number, post-processing data products and other information, which is broadcast in real time through satellite, digital broadcasting, mobile communication, etc., and provides the download service of post-processing data products through the Internet to meet the real-time positioning and navigation needs of the wide area meter level, decimeter level, and regional centimeter level within the service scope of the Beidou navigation satellite navigation system, as well as the post-processing millimeter level positioning service needs.

This specification specifies the characteristics and related performance indicators of reliable and stable service products that the Beidou ground-based augmentation system (basic service) can provide to the public and industry users. With the improvement of the construction of the Beidou ground-based augmentation system, the Beidou ground-based augmentation system will provide users with more reliable and stable services, which will be specified in the subsequent versions of the Beidou ground-based augmentation system service performance specifications.