How does a GPS Portable Navigation Device works?

15th January 2014 | By Mouseworld Now Correspondent |

Infographic on How does a GPS Portable Navigation Device Works GPS Navigation consists of 2 basic elements:
1. GPS receiver in your PND
2. Satellites in space

 GPS receiver in your PND has to know 2 things:
1. The location of at least 4 satellites above you
2. The distance between you and each of those satellites

24 satellitesare circling the Earth in 6 orbital paths. These orbits have been choreographed so that any GPS receiver on earth always gets a signal from at least 4 satellites, at any given point of time.

GPS receiver picks up signal (transmitting low power radio signals, travelling by ‘line of sight’) from the satellites to work out current location.

Signals pass though clouds, glass and plastic but usually not through solid objects, like buildings.

The GPS module in the PND translates the satellite signal into co-ordinates, pinpointing your exact location on the installed map.

Once everything has started-up, GPS receiver in your PND, calculates the current location from the satellite signal it receives.

GPS signal sent by the sateliite contain almanac information (Sat ID, altitude of the satellite, relative position to other satellites).

Using this information, the GPS module in the device, can translate these signals into co-ordinates, which is then displayed on the map.

The process is seamlessly repeated, until the vehicle with the GPS reaches its destination. Happy & Safe Travels!

No data roaming costs as compared to smartphone navigation: Enjoy seamless navigation across cities without having to worry about the cost!













By Mr. Sanu Vasudevan,Country Sales Manager, Consumer B.U, TomTom India

(The ideas and opinions expressed in the article are those of the author and doesn’t reflect that of ours. Mouseworld Now doesn’t take responsibility for any of the views expressed in the article).

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