Section 5 - Beacon Receivers; About The Northstar 8801; Northstar 8800 Series; Figure 3 - Radio-Beacon Coverage Map - NorthStar 8700 Technical Reference Manual

Section 5 - Beacon receivers

5.1 Northstar 8800 series

5.1.1 About the
Northstar 8801
05/01/97 REV H
The Northstar 8800 series DGPS beacon sensor system receives correc-
tions broadcast by land-based marine radio beacons situated along most
of the U.S. coastline and inland waterways (see Figure 3 below). GPS
receivers can use these corrections to improve their GPS accuracy to 10
meters or better, with three-meter accuracy 95 percent of the time com-
monly available.
The 8800 can significantly enhance the accuracy and performance of all
differential-capable GPS receivers that support the standard RTCM
SC-104 DGPS corrections format. DGPS corrections remove the errors
caused by atmospheric variations and Selective Availability, or SA. SA is
the intentional degradation of satellite signals by the U.S. Department of
Defense.
WA
OR
ID
NV
CA
AZ
Approximate limit of
75 V signal strength
Additional probable
coverage area for
20 V sensitivity

FIGURE 3 - Radio-beacon coverage map

Figure 3 is current as of 03/01/97. For the absolute lat-
est in radio-beacon coverage information, please visit
the Northstar
starcmc.com. Then, follow the "What's new" link,
click on "Interesting web links," and select the USCG
Navigation Center.
The 8800 and 8801 sensors are functionally identical; the only difference
is their configuration. The 8800 can be used with either the Northstar
8410 ACU or the Northstar AN195 H-field antenna, and is intended pri-
marily for marine applications. The 8801 is a bundled system intended
MT
ND
MN
WI
SD
WY
IA
NE
IL
UT
CO
KS MO
OK
AR
NM
MS
LA
TX
NOTE:
web site at http://www.north-
Section 5 - Beacon receivers
ME
VT
NH
MA
NY
CT
MI
N
PA
J
OH
IN
WV
VA
KY
NC
TN
SC
GA
AL
FL
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