The GPS global positioning system was originally established by the US Department of Defense with an investment of over $10 billion for its Star Wars program. Its role is to guide and command the US military's ships and aircraft around the world. During the Gulf War, a large number of high-tech equipment emerged, and the GPS global satellite positioning system was the most widely used one. During the Gulf War, the GPS system had not yet been fully built and its initial use had shown great power. It is widely believed that GPS technology fully demonstrated its power and played a crucial role in the entire Gulf War, thus winning the war. Quoting the original words of a US military general: In military operations, or in dangerous or threatening environments, GPS is required to provide better support for the combat effectiveness of combat members, provide safer protection for their lives, and help various weapons play a more effective role.

　　After investigation, the United States believes that there are generally four main aspects of military users' demand for GPS.

　　Global Positioning System 1 In the context of future "information warfare" and "electronic warfare", GPS must have better resistance to electronic interference;

　　2. There should be a safe range of GPS usage, which includes two meanings: firstly, GPS users can use it safely, and secondly, different types of GPS users should have different usage ranges and be treated differently;

　　3. GPS users should have a shorter initial initialization time;

　　4. It should be compatible with other military navigation systems and various weapons and equipment.

　　Except for the US military, there are currently 27 countries and regions authorized by the US military to use the US GPS precision code P (Y). It is mainly the military of NATO countries, and the countries and regions authorized for military use in the Asia Pacific region are: South Korea, Taiwan, China, Japan, Singapore, Saudi Arabia, Kuwait, Thailand, etc.

　　GPS not only plays a significant role in the navigation and positioning of various types of vehicles (including manned and firearms), but also plays a crucial role in supporting and assisting combatants, hence its high evaluation.

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