chapter  18
Global navigation satellite system
Pages 1

This chapter covers the subject of navigation

using an artificial constellation of satellites.

Global navigation satellite system (GNSS) is a

generic reference for any navigation system based

on satellites; the system in widespread use today

is the United States’ global positioning system

(GPS). Other systems in operation include the

Russian global navigation satellite system

GLONASS that was established soon after GPS

and the new European system Galileo. Several

nations are developing new global satellite

navigation systems; at the time of writing, GPS is

the only fully operational system in widespread

use throughout the world. For the purposes of

explaining the principles and operation of GNSS,

in this chapter we will refer to GPS. The chapter

concludes with a review of augmentation systems

used to increase GPS accuracy, availability and

integrity for aircraft navigation, together with a

brief insight into emerging technologies.