FIGURE 2.14 The extremely accurate timing made possible by atomic clocks has made the Global Positioning System a reality. An affordable receiver gets timing signals from satellites, and a built-in computer triangulates from the satellite locations to give locations on (or above) Earth within about one meter. Already these systems are coming into popular use for cars, trucks, boats, and planes.

networks, and so on (Figure 2.14). Such systems are being tested, for example, in rental cars in Florida.

AMO science is making a significant contribution to improvements in transportation systems and safety. The many new ideas currently under development suggest that this contribution will increase in the future



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