GPS 和 DGPS操作及原理.pdf

GPS DGPS NOTE Made Easy This booklet is intended to provide mariners with a basic understanding of the Global Positioning System (GPS) and the Differential Global Positioning System (DGPS), and to assist them in choosing the most appropriate receiver for their needs. The Coast Guard encourages mariners to learn about these systems and to take advantage of them. They will help make your voyage safer, especially when long distances and poor visibility levels make navigation difficult. 2000 EDITION NOTE This booklet is intended to provide mariners with a basic understanding of the Global Positioning System (GPS) and the Differential Global Positioning System (DGPS), and to assist them in choosing the most appropriate receiver for their needs. The Coast Guard encourages mariners to learn about these systems and to take advantage of them. They will help make your voyage safer, especially when long distances and poor visibility levels make navigation difficult. ACKNOWLEDGEMENTS For their time, their expertise and their technical guidance, I must thank Dave Ireland, Ian Gillis, Val Smith and Monique Hupé. My indebtedness extends to a host of other people as well, so many in fact that space will not allow me to mention all of you by name. I hope you will accept this acknowledgement of my deep appreciation. I would also like to thank the Garmin Corporation for allowing the Canadian Coast Guard to reprint some of their material. Lynn Denis Standards Officer Navigation Systems Branch Canadian Coast Guard GPS / DGPS MADE EASY WHAT IS GPS? The Global Positioning System is a sa