GPS was originally established for the military with precise positioning. It is still controlled by the US military. Military GPS products are mainly used to determine and track the coordinates of soldiers and equipment in the wild. The application of the GPS system will be widely used. We can apply the GPS signal to guide the presence of navigation missiles in sea, air, and land. GPS satellite positioning technology in the field of surveying and mapping has been used to establish high -precision national earth measurement control networks to determine global earth dynamic parameters; for establishing land marine land measurement benchmarks for high -precision island land joint testing and marine surveying and mapping; use Monitor the motion status and crustal changes in the earth's sector; for engineering measurement, it has become the main means to establish a city and engineering control network. The camera location used to determine the instantaneous camera position of aerospace photography realizes the technological revolution that only has a small amount of ground control or no ground control.

　　Many commercial and government agencies also use GPS devices to track their vehicle positions. Generally, wireless communication technology is needed. Some GPS receivers integrate radio, wireless telephone and mobile data terminals to meet the needs of the team management. Due to the emergence of diversified space resources and environment, systems such as GPSGLONASSINMARSAT have a diversified spatial resource environment. This diversified space resources and environment prompting international folk to form a common strategy, on the one hand, the existing system makes full use of the use of the private GNSS system on the one hand to build a GNSS pure civilian system around 2010, /GNSS three -footed trend can fundamentally get rid of the reliance on a single system to form a security resource environment with international common and international sharing. Only the world can enter the highest application state of satellite navigation as a single navigation method. This strategy in the international folk in turn has influence and forcing the United States to make more open adjustments to its GPS usage policy. In short, the establishment of a diversified space resource and environment has created an unprecedented good international environment for the development and application of GPS.

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