What You Need To Know About Gps
By Chiun Master

What It Is and How It Works – For the uninitiated, GPS stands
for Global Positioning System.  It’s a method of finding a
receiver anywhere on earth or in orbit, and it’s probably one of
the most important inventions of the 20th century.  GPS can be
used in so many varied ways that new technologies are constantly
being developed and improved in order to take advantage of it.
Now why is GPS so important and useful?  First, we have to
understand how it works.

In order to work, a satellite network orbiting the earth is
used.  These satellites each broadcast a specific signal, which
is received by inexpensive aerials and passed on to GPS devices
where it is then decoded and used by dedicated software.  The
information garnered from these signals allows the GPS software
to identify the satellite, its specific location, and even
calculate the exact time it took for the signal to travel from
the satellite to the receiver.  Using different signals from
different satellites, the GPS software can now analyze the
position of the receiver, in terms of latitude and longitude.

Mapping It Out – Even getting the information about the
receiver’s location will be useless without something to compare
it with.  This is where the mapping comes in handy; thru this,
GPS can analyze our location and maps out possible routes.
Actually, the mapping data is what makes a GPS device expensive.

This should be updated regularly and frequently in order to be

Several kinds of maps are created for different users.  Road
users need maps containing accurate data about the road systems
in their particular region, but they won’t need data about the
lay of the land.  Hikers, however, might require a more detailed
map about the local terrain, water spots, and tracks or trails,
but they won’t need extensive information about the road
systems.  On the other hand, sailors will need specific data
about the sea bed, navigable channels, and other related
information that will allow them to navigate safely.  

And what about fishermen?  They also use marine GPS to keep
track of the movements of fish in real time and to predict where
they’ll be the next day.  In fact, cooperative fishing has
become much easier with GPS, allowing boats to relay locations
to each other while looking for the best fishing spots.  There
are also GPS devices called “fish finders”, which combines GPS
and sonar functions to track and store detailed fishing and
maritime information.

Get Started with GPS – Consumers can avail of several GPS
devices that are specifically designed for a variety of uses and
functions.  In-car systems have advanced features like voice
guidance, dynamic route calculations, and even upgrading your
maps from a CD-ROM.  Rugged handheld GPS devices, like those
from Garmin and Magellan, have a map inside and are usually used
for outdoor activities.  They do not have detailed road
information and the user has to find his own way from point A to
point B without any route calculations.

Recently, PDAs and even a few sophisticated mobile phones have
incorporated GPS technology into their own systems.  A GPS
receiver can be easily attached to these devices, which makes
them possibly the cheapest and easiest GPS receivers to use in
the market today.  Bluetooth technology has also started to make
use of GPS, using a single PDA device wirelessly connected to
several receivers.

About the Author: Chiun Masters is a researcher and writer
working for http://www.audioavi.com, where you can get quality
GPS and audio equipment.  Visit us for all your audio equipment

Source: http://www.isnare.com

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