Lewis Perdue
Navstar GPS Internet Connections
Trimble GPS is at work all over the world, solving some of
humankind's most vexing problems - from surveying roads to
improving the efficiency of cellular paging networks, from
instantaneously dispatching emergency vehicles to mapping the
damage from earthquakes, from navigating the featureless China
desert to recording and synchronizing financial transactions around the
world. Trimble is a leading solutions provider in each of the areas in
which we do business.
A tutorial in the basic principles behind GPS
technology
In this section we'll answer the questions:
Why was GPS developed?
What is GPS?
How does GPS work?
How does Differential GPS work?
How is GPS being put to work?
rimble is the leading designer and manufacturer of GPS
equipment in marine navigation, marine survey systems and
communications systems. With over 600 worldwide authorized
dealers Trimble provides superior customer service and support. n 1984, Trimble gave mariners their first commercial GPS receiver.
Since then it's continued to produce the most innovative products in
marine navigation, marine survey systems and communications
systems. Trimble navigation products range from handheld receivers
to fully integrated DGPS/charting systems.
Sperry Marine has selected Trimble as the preferred provider of GPS
receivers. Sperry, which provides precise positioning information for
commercial ship navigation, uses the Trimble NT200 and NT200D as
part of their integrated navigation systems.
Trimble was awarded the U.S. Coast Guard contract to provide 326
custom NT200's, for use in the USCG's Aids to Navigation (ATON)
vessels. The vessels are being used to place and maintain more than
50,000 buoys, day markers and lights throughout the U.S. coastal
waters and inland navigable rivers.
The NavGraphicXL is a complete marine navigation system
that includes the largest graphic display of any GPS-based marine
navigation system on the market. The system, which is comprised of
four easy-to-install modules, includes a ruggedized CD-ROM reader
for reading digitized versions of NOAA charts. Using these charts,
mariners can view real-time vessel position relative to depth contours,
landmarks, hazards and buoys.
Other system components include a slim, sophisticated navigation
computer and a differential-ready, 6-channel GPS sensor. Mariners
can use differential corrections for precision navigation with the help
of the Trimble’s NavBeaconXL or other differential beacon receiver.
Back-lit LCD 9.5 inch display provides wide viewing angles
and exceptional contrast.
Three NMEA-0183 ports provide links to other navigation
devices including radars, autopilots, fish finders and depth
sounders.
Electronic Charts Simplified
A PRACTICAL GUIDE TO GPS
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