"... Although developed as a classroom text, the book is also useful as a reference source for professional surveyors and other GPS users. This because it covers both GPS fundamentals and leadingedge developments, thus giving it a wide appeal that will clearliy satisfy a broad range of GPS-philes ... The volume cogently presents the critical aspects and issues for users, along with the theory and details needed by students and developers alike. For those seriously entering the rapidly changing GPS field, this book is a good place to start." GPS WORLD September "This is the fourth edition of the book, and the authors are to be congratulated on their efforts ... This book has now gained wide acceptance as a 'serious' book on GPS ... " Navigation