GPS is the United States, GPS is the English abbreviation for Global Positioning System (Global Positioning System), GPS began in 1958 as a project of the United States military, and was put into use in 1964. It provides real-time, all-weather and global navigation services for the three major areas of land, sea and air, and is used for military purposes such as intelligence gathering and emergency communications.
The enhancement of people's quality of life by GPS is quite large, and GPS free is a benefit to people's livelihood all over the world, but it is a challenge in the military. In fact, GPS is open only to civilian code, and the accuracy is several times worse than the military code used by the US military. The armament of other countries must not use the U.S. GPS, once the formation of dependence will be like drug addicts can not be extricated, must develop their own positioning and navigation system.
Expanded Information
China's "GPS" Beidou Satellite Navigation System
China's Beidou Satellite Navigation System (BDS) is China's self-developed satellite navigation system. BDS is China's self-developed global satellite navigation system. It is the fourth mature satellite navigation system after the U.S. Global Positioning System (GPS), Russia's GLONASS satellite navigation system (GLONASS), and Europe's Galileo satellite navigation system.
BeiDou satellite navigation system consists of three parts: space segment, ground segment and user segment, which can provide high-precision and highly reliable positioning, navigation and timing services for all kinds of users on a global scale in all-weather, round-the-clock basis, and has the capability of short message communication, and has the preliminary capability of regional navigation, positioning and timing, with the accuracy of positioning of 10 meters, speed measurement of 0.2 meters/second, and timing accuracy of 10 nanoseconds.
On Nov. 5, 2017, China's third-generation navigation satellites successfully lifted off, marking the official start of China's construction of the "Beidou" global satellite navigation system.
At 7:52 p.m. on August 25, 2018, China successfully launched the 35th and 36th Beidou navigation satellites in a "one-arrow-two-stars" launch with the Long March 3B carrier rocket (and the Expedition 1 upper stage) at the Xichang Satellite Launch Center, the two satellites belonging to medium-circle Earth orbit satellites, which are also the 11th and 12th group satellites of the country's Beidou 3 global system. The two satellites belong to medium-circle Earth orbit satellites, and are the eleventh and twelfth satellites of China's Beidou-3 global system.
At 22:07 p.m. Beijing time on the evening of the 19th, China successfully launched the 37th and 38th Beidou navigation satellites in a "one-rocket, two-star" launch with a Long March 3B carrier rocket and an Expedition 1 upper stage at the Xichang Satellite Launch Center. These two satellites belong to medium-circle Earth orbit satellites and are the 13th and 14th satellites of China's Beidou-3 global system.
On these two Beidou navigation satellites, standard equipment of the International Search and Rescue Organization (ISAR) was also loaded for the first time, which will provide distress alert and positioning services for global users.
On December 27, 2018, the service scope of the Beidou system was expanded from regional to global, and the Beidou system officially entered the global era.
Baidu Encyclopedia-GPS
People's Daily Online - U.S. Provides GPS Services to the World for Free, Why China Still Needs to Engage in Beidou
Baidu Encyclopedia-BeiDou Satellite navigation system