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Find our way around, most people have map apps on their phones that can show their location and guide them to where they want to go. But how do these apps know your location(定位) at time or place? They find you by using satellite navigation (satnav) systems(卫星导航系统).
A satnav system uses groups of satellites to find the user's location. This location is then sent to a receiver, such as a smartphone.
For satnav systems, the number of satellites is important improving the systems positioning accuracy(定位精度). The more satellites, the more accurate the positioning is.
The first satnav system was the Global Positioning System (GPS) belongs to the United States first used in 1964, the system is the world's leading satnav system. But China's satnav system, Beidou, has overtaken(超过) GPS in size, Japan's Nikkei Asian Review reported. China sent Beidou's first navigation satellite into in 2000. China also became the country to build a satnav system after the US and Russia, People's Daily reported. As of right now, over 30 countries in Africa and the Middle East are using the Beidou system.
With its world-leading technology, Beidou is leading Chinese people to a life. It is playing roles in different areas, according to Xinhua News Agency. For example, as of March, over 6.2 million vehicles(车辆) in China were using Beidou for navigation, according to a report on the Beidou system's construction and development.
the newly-built Beijing Daxing International Airport, Beidou has been used to keep track of(追踪) loading and unloading vehicles indoors and outdoors. When the airport fully opens, each baggage cart(行李车) will have Beidou navigation equipment to help passengers get luggage faster.
