Tech Buzz: How GPS works?

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Tech Buzz is back with new topic, "Global Positioning System".

Our ancestors had to go to pretty extreme measures to keep from getting lost. They erected monumental landmarks, laboriously drafted detailed maps and learned to read the stars in the night sky.

Things are much, much easier today. For less than $100, you can get a pocket-sized gadget that will tell you exactly where you are on Earth at any moment. As long as you have a GPS receiver and a clear view of the sky, you'll never be lost again :)

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People talk about "a GPS," they usually mean a GPS receiver. The Global Positioning System (GPS) is a space-based global navigation satellite system that provides reliable location and time information in all weather and at all times and anywhere on or near the Earth when and where there is an unobstructed line of sight to four or more GPS satellites.  The Global Positioning System (GPS) is a constellation of 27 Earth-orbiting satellites (24 in operation and three extras in case one fails). It is maintained by the United States government and is freely accessible by anyone with a GPS receiver.

Popular GPS Devices

Each of these 3,000- to 4,000-pound solar-powered satellites circles the globe at about 12,000 miles (19,300 km), making two complete rotations every day. The orbits are arranged so that at any time, anywhere on Earth, there are at least four satellites "visible" in the sky.

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Check how GPS works !

                   

As you travel signal is passed from Cell to Cell

       

We all have to really appreciate the brains who brought cutting edge-technology with efficient navigation solution that is making our travel easy !

Regards,

Suman G