Nobeltec WAAS GPS-18W, Руководство пользователя

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Nobeltec WAAS GPS-18W
Welcome
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Thank you for purchasing Jeppesen's®
Nobeltec® WAAS GPS-18W Receiver!
The WAAS GPS-18W is based on an 18-
channel GPS engine that delivers location
accuracy within 3 meters by decoding GPS
correction signals from satellite-based
WAAS (Wide Area Augmentation System).
The GPS engine, interface electronics,
and passive antenna are enclosed inside
durable waterproof plastic housing. This
superior-quality GPS provides advanced,
state-of-the-art positioning performance
and plug-and-play use with Nobeltec
Navigation Software charting programs.
Nobeltec Navigation Software (Visual
Navigation Suite™ or Admiral™, sold
separately), interfaced with the WAAS
GPS-18W on your onboard computer,
intelligently interprets and displays GPS
data in an easy-to-comprehend onscreen
format, providing you with the ability to
make safer and more prudent navigation
decisions in shorter periods of time.
This User's Guide covers the key
installation information for the Nobeltec
WAAS GPS-18W. It is written for an
audience assumed to have a mid-level,
pre-existing knowledge of PC operation
and the principles of marine navigation,
as well as previous marine equipment
installation experience.
This document should in no way be used
to replace actual navigation training and
experience.
Nobeltec® WAAS GPS-18W™ Product Description
What is WAAS?
WAAS consists of a network of ground reference stations across the United States that
monitor GPS satellite data. The master stations collect data from the reference stations
and create a GPS correction message, taking into account selective availability (SA),
GPS satellite orbit and clock drift, and signal delays caused by the atmosphere and
ionosphere. The “corrected” differential messages are then broadcast through two
Geostationary Earth Orbit (GEO) satellites on the same frequency as the GPS signal. The
result is a DGPS system that delivers superior accuracy (<3 meters).
Fig. 1 - WAAS System