GPS(Global Positioning System),
GPS during the 1970s by the U.S. armed forces jointly developed the new generation space satellite navigation and positioning system. Its main purpose is for land, sea and air three areas to provide real-time, all-weather and global navigation services, and used for information collection and 232th monitoring and emergency communication and some other military purpose, is the dominating the global strategy important component. After more than 20 years of research experiment, $30 billion dollars, to March 1994, global coverage up to 98% of 24 star GPS satellite constellation f investigated.several completed.
GPS and relativity relationship
We should thank Einstein, his theory makes the astonishing new device to become a reality! Design GPS satellite scientists must consider relativity brings time dilation effect and relativity the passage of time rate and the relationship between dimensions.
