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Compass satellite navigation system of China Construction


GLONASS system to achieve more cooperation within the system. Users worldwide multi-system receiver to all system data can be collected or a 24, a combination of various systems of data mining to achieve positioning and navigation requirements. Compared with the U.S. GPS system, Galileo system has many advantages. First, the ground can provide 3 types of signals to choose from, including free signal, and the need to pay to use encrypted signals, encryption and can meet the higher requirements of the signal. Second, can send real-time precision location information, which is the existing satellite navigation systems do not have. Third, to ensure the provision of services in many special cases, if the failure can notify customers within a few seconds. Fourth, the system is more advanced, more reliable, the highest positioning accuracy of GPS systems than it is now 10 times to determine the error range of objects within 1 meter. Overview Beidou satellite navigation experimental system to promote national economic development, safeguarding national interests and national security, October 31, 2000, December 21 and May 25, 2003, the Chinese \Xichang Satellite Launch Center successfully launched three developed by the China Academy of Space Technology of the Compass navigation test satellite, built with independent intellectual property rights in China regional satellite navigation system. One Beidou 1 satellite (Beidou1) and Compass 2 satellite (Beidou2) at 140. E and 80. E orbital position on the fixed-point run, Compass 3 satellite (Beidou3) stars as a backup at 110.5. E orbital position on the service. In 2002, the Compass satellite navigation system began trial operation, two years after the opening round of the civilian customers. In recent years, Compass satellite navigation test system working and stable, good condition, can be in China and surrounding areas within the coverage area at any time, any place, for the user to determine their geographic latitude and longitude information, and provide two-way short message communication,[link widoczny dla zalogowanych], and precise timing and other services. Currently, the system has been in surveying, telecommunications, water conservancy, meteorology, coal, road transport, railway transport, fishery production,[link widoczny dla zalogowanych], exploration, agriculture, forest fire prevention and national security and other fields gradually play an important role in civil affairs, tourism, sports, etc. also play a certain effect, and even some industries have been gradually developed to the pilot to promote the industry. Experts point out that Compass satellite navigation test system successfully applied not only generate significant economic and social benefits, but also for our country to be established global satellite navigation system Compass laid a solid foundation. Compass Construction of Global Satellite Navigation System in the Chinese government published \National Development and Reform Commission, National Defense, the National Science and Technology and Ministry of Information Industry has formulated a related policies. Person in charge of Chinese government announced in 2006, the Compass navigation satellite test system, based on the independent intellectual property rights in China began building a global satellite navigation system - Compass satellite navigation system, which is the establishment of the first generation of China's own global satellite navigation system. According to reports, is building the Compass satellite navigation system space segment by the five geostationary satellites and 30 non-geostationary orbit satellites to provide two ways, namely, opening up the service and authorization service. Open service is provided free of charge in the service area positioning, velocity and timing services at inches, positioning accuracy of 10 meters, grant-inch accuracy at 5O nanoseconds, the accuracy is 0.2 m / sec. Authorized service is provided to authorized users a more secure positioning, velocity, grant B, J $ O communication service information. To this end, in the coming years, China will gradually launch series Compass navigation satellite, and plans to meet around 2008 users in China and surrounding areas the demand for satellite navigation systems, network and test the system at the same time, and gradually extended to the global satellite navigation system . Alleged that the construction is being implemented Compass satellite navigation system, will be mainly used for economic construction,[link widoczny dla zalogowanych], China's transportation, meteorology, petroleum prospecting, forest fire prevention, disaster forecast, telecommunications and public security and other special offers efficient navigation and positioning industry services. The system with the U.S. GPS system and Russia's GLONASS system, the biggest difference is that it not only enables users to know their location, you can tell people where their place, especially for the needs of navigation and mobile data communications sites,[link widoczny dla zalogowanych], such as transportation, command and control, search and rescue,[link widoczny dla zalogowanych], geographical information in real time inquiries. In another development, 3 February 2007 and April 14 successfully launched two Compass navigation satellite, has now turned into a normal mode according to plan, opening the navigation signal. O
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