Global Positioning System, or GPS, is the world's only fully functioning satellite navigation system. It is run by over two dozen satellites positioned in earth orbit, and is vital for flight, ocean, and land navigation. It is also used for map making, land surveying, and accurate time reference. Of course the most well-known use today is the automotive GPS system.
The automotive GPS system has become nearly standard in newer vehicles as current technology develops smaller, better, and more user-friendly devices. In fact it's possible that you landed on this article while doing research to purchase your own GPS! If so, congratulations on your decision. This article should give you some good pointers in making your purchase.
An automotive GPS system differs from other GPS in that it uses satellite location data to pinpoint a driver's road location in a map database, then uses sensors located on the vehicle to give accurate distance and turning directions to a desired location. Just like any satellite system, GPS is limited by reception. Tunnels and canyons can temporarily interrupt communication, but designers developed automotive GPS with this in mind. It can and will keep directions in memory until it reestablishes satellite contact.
The automotive GPS system uses a combination of views and measures to give the driver his own preference. You can see a top view map, a top view map that rotates with the vehicle, a "bird's eye" map that shows the surrounding area (so you can see upcoming curves), a linear gauge for distance, or simply numbers for the distance. In addition, many automotive GPS systems respond to voice command and will give verbal directions along with a visual map.
One of the latest developments in the automotive GPS system is traffic reports. Yes, you read right! The newer GPS systems are able to locate and download local traffic reports, and can even suggest alternate routes if the one you're on is congested. This can also include real-time data about which parking lots are full or where there is space, and information about public transport should you have to leave your vehicle.
Power and memory options on an automotive GPS system are pretty standard. Many come with rechargeable lithium or nickel cadmium batteries, and will have AC adapters as well as 12 volt cigarette lighter plugs. As memory goes, the more you want, the more you pay. Some systems even have a 20 gig hard-drive for storage and extra functions such as MP3 or DVD players, satellite radio, or GPS add-ons. Some of them also come with slots for memory cards, and the add-ons are nearly endless!
Obviously there are a lot of options to consider when purchasing your automotive GPS system, and the bottom line is, how much do you want to pay? Used systems can be found as low as $100, whereas newer systems can cost $500 or more. You would do well to shop around, checking prices at many different sources before making your purchase. Many have found their automotive GPS system to be indispensable - maybe you will too!
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By Thomas Savenstock
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