TAILIEUCHUNG - GPS - đường dẫn quán tính và hội nhập P2

This book is about GPS and INS and their integration. An inertial navigation unit can be used anywhere on the globe, but it must be updated within hours of use by independent navigation sources such as GPS or celestial navigation. Thousands of self-contained INS units are in continuous use on military vehicles, and an increasing number are being used in civilian applications. Systems Other Than GPS | Global Positioning Systems Inertia Navigation and Integration. Mohinder S. Grewal Lawrence R. Weill Angus P. Andrews Copyright 2001 John Wiley Sons Inc. Print ISBN 0-471-35032-X Electronic ISBN 0-471-20071-9 __2 Fundamentals of Satellite and Inertial Navigation NAVIGATION SYSTEMS CONSIDERED This book is about GPS and INS and their integration. An inertial navigation unit can be used anywhere on the globe but it must be updated within hours of use by independent navigation sources such as GPS or celestial navigation. Thousands of self-contained INS units are in continuous use on military vehicles and an increasing number are being used in civilian applications. Systems Other Than GPS GPS signals may be replaced by LORAN-C signals produced by three or more long-range navigation LORAN signal sources positioned at fixed known locations for outside-the-building location determination. A LORAN-C system relies upon a plurality of ground-based signal towers preferably spaced apart 100-300 km that transmit distinguishable electromagnetic signals that are received and processed by a LORAN signal antenna and LORAN signal receiver processor that are analogous to the Satellite Positioning System signal antenna and receiver processor. A representative LORAN-C system is discussed in LORAN-C User Handbook 85 . LORAN-C signals use carrier frequencies of the order of 100 kHz and have maximum reception distances of hundreds of kilometers. The combined use of FM signals for location determination inside a building or similar structure can also provide a satisfactory location determination LD system in most urban and suburban communities. 9 10 FUNDAMENTALS OF SATELLITE AND INERTIAL NAVIGATION There are other ground-based radiowave signal systems suitable for use as part of an LD system. These include Omega Decca Tacan JTIDS Relnav . Air Force Joint Tactical Information Distribution System Relative Navigation and PLRS . Army Position Location and Reporting System .

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