This thoroughly revised edition of the Artech House bestseller, Introduction to GPS: The Global Position System offers professionals and students an up-to-date, easy-to-understand treatment of this tremendously important technology. The second edition includes a wealth of brand new material, including a chapter on GPS satellite orbit and new coverage of today's hottest issues, such as precise point positioning and location based services. Without bogging readers down with advanced mathematics, the book addresses all aspects of the GPS, emphasizes GPS applications, examines the GPS signal structure, and covers the key types of measurement being utilized in the field today.