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GPS Quick Course Book
Global Positioning System - GPS Book
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GPS Errors GPS Errors
GPS errors are unwanted variations in position measurements that come from a variety of error sources. Without corrections to the errors, the accuracy of the GPS system is approximately 50 to 100 meters.
GPS Errors GPS Error Sources
GPS Error Sources Diagram

This figure shows some of the causes of position errors in the GPS system. Atmospheric conditions in the ionosphere and troposphere slows down and redirects (refracts) GPS radio signals. The orbital position information (ephemeris) may be slightly off and the timing of the GPS clock (drift) may be off. The satellite information may be intentionally offset by the department of defense for security reasons. The GPS radio signals may be reflected off of nearby terrain (e.g. mountains) or tall buildings.
alt GPS Quick Course, 2nd Edition Books
Global Positioning System - GPS Book
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 GPS Quick Course Book
This book covers satellite position location technology and the GPS system has evolved. You will learn the functional parts of GPS systems, how they work and work together to provide position measurements that are accurate to within centimeters.

$19.99 Printed, $16.99 eBook
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