How Do GPS Systems Work?
Garmin GPS Sytem Models & Listings
The times when the entire family had to quarrel over a paper map
during traveling are now long gone, due to the invention of GPS
systems. What was once thought to belong only to sci-fi movies,
it is now common knowledge.
If you want to make your trips worry
free, you have to install on your vehicle one of the GPS systems
that can now be bought on the market. This way, you will have a
pleasant traveling companion that will tell you where to turn left
and right, without ever being wrong.
There is a lot of technology involved with GPS systems, and we
are not talking about only about the box you get when you purchase
a GPS device to install on your car. This technology was developed
by the United States Department of Defense and it was later on released
to the general public. GPS systems are based on the activity of
the twenty seven satellites that orbit the Earth. Twenty four are
online all the time, helping us receiving information on weather,
or receiving TV signals, or while driving through the GPS devices
in our cars. The other three are responsible for back up in case
that such thing is needed.
Here is a little bit of insight on how these satellites work. They
weigh about 3,000-4,000 pounds and they draw their energy from the
sun. The speed with which they travel is 12,0000 miles or 19,300
km, that allows them to circle the Earth two times in twenty four
hours. They are displayed in a certain fashion that guarantees the
presence of four satellites in the sky in the same time, in the
so called visible sky from a certain point on the planet. Even if
we do not see them with the open eye, they are there and they are
responsible for translating the signals they get from a GPS receiver
in a car into map coordinates and then send them back. This process
is known as trilateration and it is a mathematical calculation.
There are still some drawbacks that cannot be ignored. When weather
conditions are bad and the sky is compact with clouds, the signals
transmitted between the satellites and the GPS systems are hindered
to get from one part to the other at a normal speed. Manufacturers
are thinking about new ways to lower this nuisance and to give their
customers products that can surpass this issue of the GPS systems.
The further the distance from the satellite, the longer the time
for receiving info. But the GPS systems are capable of coping with
the situation and after a little time necessary for making the mathematical
calculations, the position will be rendered on the GPS device screen.
There are many uses for GPS systems. One and maybe the best known
is its role as a navigation help. With GPS systems installed on
our card, traveling is a real pleasure. With the voice option enabled,
we do not even need to get our eyes off the road as we can listen
to all the instructions, step by step. GPS systems are also used
for tracking purposes, a role that is most convenient for companies
with vehicles fleets that need to know where their cars and drivers
are at a certain moment.
Gaining access to new technologies is a great thing, and GPS systems
are such a gain. Many people consider that these products really
changed their lives for the better.
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