DISCLAIMER: This article is being kept online for historical purposes. Though accurate at last review, it is no longer being updated. The page may contain broken links or outdated information.
Global Positioning System (GPS)
McDonald, Keith D. Formerly, Navtech Consulting, Alexandria, Virginia.
- Modernization activities
- Related Primary Literature
- Additional Reading
The Global Positioning System is a satellite-based system providing worldwide continuous position, velocity, time, and related data to civil and military users. It has a growing number of applications in the fields of marine, land, and aerospace navigation and precise time and time transfer, as in surveying, geodesy, and mapping; precision farming; air-traffic control; asset location and tracking; and timing of communication systems and power grids. Since the 1960s, GPS has grown from a navigation concept to an operational system of about 24 spacecraft (Fig. 1) serving millions of users. Over a million GPS receivers a year were produced during 1997–1999.
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 10,000 highly qualified scientists and 45 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information