This book is dedicated to Dr. Benjamin William Remondi for many reasons.
The project of writing a Global Positioning System (GPS) book was con-
ceived in April 1988 at a GPS meeting in Darmstadt, Germany. Dr. Remondi
discussed with me the need for an additional GPS textbook and suggested
a possible joint effort. In 1989, I was willing to commit myself to such
a project. Unfortunately, the timing was less than ideal for Dr.
Remondi. Therefore, I decided to start the project with other coauthors.
Dr. Remondi agreed and indicated his willingness to be a reviewer. I
selected Dr. Herbert Lichtenegger, my colleague from the Technical
University Graz, Austria, and Dr. James Collins from Rockville,
Maryland, U.S.A. In my opinion, the knowledge ofthe three authors should
cover the wide spectrum of GPS. Dr. Lichtenegger is a geodesist with
broad experience in both theory and practice. He has specialized his
research to geodetic astron- omy including orbital theory and
geodynamical phenomena. Since 1986, Dr. Lichtenegger's main interest is
dedicated to GPS. Dr. Collins retired from the U.S. National Geodetic
Survey in 1980, where he was the Deputy Director. For the past ten
years, he has been deeply involved in using GPS technology with an
emphasis on surveying. Dr. Collins was the founder and president of
GeofHydro Inc. My own background is theoretically oriented. My first
chief, Prof. Dr. Peter Meissl, was an excellent theoretician; and my
former chief, Prof. Dr.mult. Helmut Moritz, fortunately, still is.
