Published online by Cambridge University Press: 05 March 2012
“It is impossible to achieve theoretical understanding of the universe without instruction”
Claudius Ptolemy, Almagest.In this book we consider Global Navigation Satellite Systems (GNSS) and their applications in navigation and geophysics. First established and up until today the main system is the American GPS, followed a little bit later by the Russian GLONASS. Both were created for navigational purposes. In this chapter we consider the principles and methods of navigation with GNSS satellites. We also give some main definitions here, which are used throughout the book.
Global and regional satellite navigation systems
Satellite navigation systems can be divided into two main categories: global and regional. There are also local systems, which are based on pseudolites. These systems, though not strictly satellite systems, are also considered in this book, because they may be used in conjunction with GNSS or they may use the same type of signal and the same user equipment as GNSS.
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