The global positioning system (GPS) uses geosynchronous satellites that pinpoint locations on earth using comparatively inexpensive equipment. Discuss how the system operates and then discuss the implications of having this information freely available.
What will be an ideal response?
A geosynchronous orbit means that the satellite stays in a fixed position relative to the earth; it rotates around the earth at the earth’s rotational velocity. Sufficient satellites, actually a redundant number, assume constant communication around the earth. Using triangulation, signals from three or more satellites to one position allow that position to be determined through geometry. The free use of this information, e.g., GPS systems in cars, allows travelers to know where they are and can provide directions from one place to another. They can also track where a person or vehicle is, so the whereabouts are known.
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