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Gps And Sat Nav Comparison.
Before we look into Sat Nav comparison issues lets take a look at how the devices work, the science part! As mentioned earlier, the kind of GPS that we are all familiar with either in our smart phone or perhaps a car relies on the vast network of satellites orbiting the earth. These satellites know exactly where they are at all times and onboard they all have a synchronised atomic clock so they also know when they are in an exact position and they beam this information down to earth. Your hand held GPS takes this signal and uses it’s own internal clock to work out how long the signal takes to reach it and subsequently how far away the satellite is. It then triangulates between three satellites so your GPS can work out where you are (depending on the accuracy of the device it may need the help of a fourth satellite to lock your position down to within a few meters). If you are thinking of buying a GPS device it pays to perform a Sat Nav comparison as all devices are not created equal. The first most noticeable option for your Sat Nav comparison is whether to go for a portable or dash-mounted unit. Although dash units are much tidier (no dandling wires and suction cups stuck to your windscreen) and generally have bigger, higher resolution screens, they are not portable (you can’t easily move them from car to car and you can’t use them on a walk) and they are generally more difficult to set up needing maps stored on CD’s or DVD’s rather than conveniently loaded to the hard drive of a portable unit. If you choose the more adaptable portable type, the next Sat Nav comparison you need to make is screen size. Some screens are difficult to see in bright sunlight so as a rule bigger and brighter are better however you will have to pay more for a bigger screen. The user interface is an important consideration in your Sat Nav comparison, not all systems are created equal so look for street level mapping and turn by turn directions as your basic requirements. For extra points on your Sat Nav comparison, look for features like a touch screen, automatic re-routing (if you miss a turn on the motorway) and a points-of-interest database to show you the nearest petrol station or hotel etc. Products at the top of your Sat Nav comparison chart should offer features like traffic and weather alerts, speed camera warnings and big anti-glare screens, don’t forget the cost of these features adds up but also increases the usability of your product. Article Directory: http://www.articledashboard.com This article was written by Jeremy Jacobson on behalf of Best Bargains In UK, specialists in GPS and Sat Nav products. For Sat Nav comparison please visit BestBargainsInUK.co.uk |
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