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GPS Overview
This section introduces you to the GPS system, which is the
system used by the unit to acquire navigation information.
The Global Positioning System (GPS) is a satellite-based
navigation system developed and maintained by the United
States Department of Defense (DoD). The system, which
was originally designed for military purposes. includes a
separate signal (C/A code) for civilian use.
Segments of the GPS system
The GPS system is made up of three segments:
* The space segment, which will — when completed — be
composed of 22 satellites (and two operational spares) in
six orbits. The satellites transmit signals with highly
accurate orbital and timing information.
Space segment
User
segment
Ground
antenna
A GPS receiver, such as the IPS-760, uses the GPS satellite
signals to determine your precise geographic location,
including latitude, longitude, and altitude. The GPS signals
are available worldwide 24 hours a day.
* The control segment, which consists of a master contro!
station, five remote monitoring stations, and three ground
antennas. The monitoring stations track the GPS satellites.
The data gathered by the monitoring stations is processed
by the master control station, which updates the orbital
information of each satellite. The updated information is
transmitted to each GPS satellite by the ground antennas.
¢ The user segment, which consists of the GPS receiver.
Control segment
Master control
station
Introduction
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