内容简介：
The U.S. Global Positioning System (GPS), now the world's preeminent pointing, navigation, and tracking (PNT) system, will in the not too distant future be joined by the European Union's Galileo, a PNT system planned to be similar to GPS in function and performance. Will the two systems cooperate, providing users with the benefits of both, or will they compete? The authors assess the economic impact of competition and how the United States can address that competition, especially as it affects U.S. economic interests.