ABSTRACT
GPS was put in place with amazing speed, considering the technological hurdles and reached its fully operational capability on July 17, 1995. The oldest satellites in the current constellation were launched in the early 1990s. If you imagine using a personal computer of that vintage today, it is not surprising that there are plans in place to alter the system substantially. In 2000, U.S. Congress authorized the GPS III effort. The project involves new ground stations and satellites, additional civilian and military navigation signals, and improved availability. This chapter is about some of the changes in the modernized GPS, its inclusion in the Global Navigation Satellite System, and more.
