GPS can provide navigation and positioning services for road, rail, air and sea transportation vehicles. It can be used for both military and civilian purposes, with strategic roles and commercial interests at the same time.

　　The Global Positioning System consists of multiple satellites orbiting the earth that continuously emit radio signals of a certain frequency. As long as you have a portable signal receiver, you can receive specific signals from satellites whether you are on land, at sea or in the air. The computer in the receiver selects and analyzes the signals from several satellites to determine the position of the receiver's holder.

　　GPS has many other uses. Scientists can use it to monitor tiny movements in the earth's crust to help predict earthquakes; surveyors use it to determine the boundaries of the ground; car drivers use it to find their way when they get lost; military forces rely on it to ensure the correct path forward, etc.

　　The GPS global satellite positioning system currently owned by the United States is far ahead in technology. GPS in the United States consists of 24 satellites orbiting the earth, which are evenly distributed in 6 orbits. Each satellite is about 17,000 kilometers from the ground.

　　At present, the United States' global satellite positioning system generates sales of up to 8 billion euros per year for its distribution companies. The FAA expects the industry's sales to double again in the next two to three years as satellite positioning and navigation applications become more widespread.

　　The "Galileo" satellite positioning system will enhance the EU's strength in this field and bring huge economic benefits. A study by the European Union estimates that the development of "Galileo" satellite positioning and navigation technology can create about 140,000 jobs in Europe alone, and the annual economic benefits will be as high as 9 billion euros. The sale of aviation and marine terminal equipment alone could generate 15 billion euros in revenue between 2008 and 2020. The economic benefits of the Galileo program are expected to reach 74 billion euros by 2020.

　　The "Galileo" plan will also bring huge social benefits to Europe. The "Galileo" satellite positioning system, as the core part of the future traffic management and measurement system, will be the key to reducing related costs and generating macroeconomic benefits. In the application of road navigation systems, a 1% reduction in travel time, traffic jams, air pollution and traffic accidents can save 200 billion euros; in civil aviation, the corresponding figure is about 500 million euros.

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