How many satellite navigation systems are there worldwide? Where are the satellite navigation systems located?
How many satellite navigation systems are there in the world? There are four major satellite positioning systems in the world: China's BeiDou Satellite Navigation System (BDS), the U.S. Global Positioning System (GPS), Russia's GLONASS Satellite Navigation (GLONASS) and Galileo Satellite Navigation System (GALILEO). Which are the respective satellite navigation systems?
1. China Beidou Satellite Navigation System (BDS)
Beidou Satellite Navigation System (BDS) is a global satellite navigation system independently built and operated by China, and is compatible with other satellite navigation systems in the world. The BeiDou satellite navigation system can provide high-precision and reliable positioning, navigation and timing services for all kinds of users around the world, and at the same time has the capability of short message communication. How to navigate with Beidou is not difficult.
In addition to playing an important role in China's national security field, it will also serve the country's economic construction by providing services such as monitoring and rescue, information collection, precise timing and navigation and communication. It can be widely used in many industries, such as transportation on ships, transportation on roads, transportation on railroads, operations at sea, production in fisheries, forecasting in hydrology, fire prevention in forests, and monitoring in the environment.
2. American Global Positioning System (GPS)
The Global Positioning System (GPS) was established for military purposes in the U.S. GPS utilizes navigation satellites to measure time and distance, and has the capability of all-round real-time three-dimensional navigation and positioning on the sea, on land and in the air. It is the third largest space project of the United States, second only to the Apollo moon landing program and the space shuttle. Nowadays, GPS has become the most practical and widely used global precise navigation, command and dispatching system in the world.
3. Russian GLONASS satellite navigation system (GLONAXX)
“GLONASS is a satellite positioning system, similar to the United States, the Global Positioning System, built by the former Soviet Union in the early 1980s. It covers the entire surface of the Earth and near-Earth space and consists of three parts: a satellite constellation, ground monitoring stations and user equipment. Russia claims that the versatile GLONASS system has a positioning accuracy of up to 1 meter and a speed error of only 15 cm/sec.
4. Galileo Satellite Navigation System (GALILEO)
The Galileo project, with a total investment of 3.5 billion euros, is an independent civilian global satellite navigation system in Europe, providing high-precision, highly reliable positioning services, realizing full non-military control, and allowing for global coverage of navigation and positioning functions. As a global satellite navigation and positioning system, JALEO has a wide range of applications in geodesy and geodynamics services, as well as in transportation, railroads, aviation, agriculture, maritime affairs, engineering and construction, energy and other fields.
The construction, development and application of the BeiDou satellite navigation system will be open to the world, providing high-quality and free services to users worldwide, actively engaging in extensive and in-depth exchanges and cooperation with countries around the world, and promoting the compatibility and interoperability of various satellite navigation systems.
