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> How Does GPS Work? |
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| How Does GPS Work? |
GPS is one of the modern ways to find out
where are you, for this people have been doing forever.
They also want such an ability to tell others because
of that they can use the info to make maps as seen here.
GPS satellites transmit signals to equipment on the ground.
GPS receivers pick up these signals and measure the distance
to a satellite by multiplying the speed of the signal
by the time it takes the signal to get there, they do
not transmit it. Here the speed of the signal is equivalent
to speed of the light and the time is encoded within the
signal. The satellites have great ability that they can
send information on their exact location.
Each one of the Global Positioning System satellite transmits
data that helps in getting the location of the GPS and
the current time. These GPS transmits the signals at the
same instant. These signals sometimes arrive at slightly
different times; they travel at a speed of light, because
some satellites are bit away than others. The time require
to travel to the receiver determines the estimated amount
of time if takes for their signals to reach the receiver.
When the receiver estimates the distance, the four GPS
satellites then calculates its position in three dimensions.
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