8 Version 3.3
Operator’s Manual Functional Description
DGPS Beacon System
As Maritime Safety Administrations, Navy, and Coast Guard
Organizations realize the limitations of standard GPS positioning,
many have begun installing DGPS Beacon Stations. While an
understanding of this system is not necessary for operating receiv-
ers with internal beacon receivers, you may want to read on to have
a better understanding of how your receiver is capable of achieving
the high levels of accuracy made possible by this network of
transmitters.
The DGPS Beacon System is comprised of three segments; the
reference station, Integrity Monitor (IM) equipment located at the
beacon site and the Navigator equipment located on board the
user’s boat or vehicle. The DGPS beacon system design is illus-
trated below.
5271-01C.500
Navigator Site
NA V
P L O T
P O S
E
T I D E
G P S
C F G
RT E
A U X
DG P S
C
W P T
MX 400 Professional DGPS Navigator
MX 50M
DG PS B ea co n Mod u lato r
M X 9 40 0 R
DGP S R efere nce
Reference Station Site
MX 94 00 N
DGP S Navig at or
MX 51R
Integrity Monitor Site
Surveyors / Commercial
Users
Professional / Commercial /
Personal Craft Users
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