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In 2012, the Beidou-2 regional satellite navigation system was completed, consisting of 14 satellites (two backup MEOs were launched later), officially providing positioning, navigation and short message services for key regions in the Asia-Pacific region.
In 2018, the Beidou-3 network launch was launched, and the last satellite of the Beidou-3 was successfully launched in June 2020, marking the completion of the Beidou-3 global system, officially providing seven major services such as positioning and navigation, short messages, and satellite-based augmentation.
Compared with the Beidou-2 system, the main differences between the BDS-3 system and the BDS-2 system are as follows.
(1) Systems and services
Beidou-2 is a regional satellite navigation system that only provides basic services for the Asia-Pacific region, while Beidou-3 is a global satellite navigation system that provides a variety of services to the world. The main differences of the system are as follows:
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