What is a GPS Receiver & Which is Best?
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What is a GPS Receiver and How to find the Best GPS for Christmas 2009?
GPS systems, or global positioning satellite systems have been around for years. These systems depend on orbiting satellites, for both receiving and sending signals. GPS permits land, sea and airborne users to determine their position in time, 24 hours a day, anywhere in the world, and has become an integral part of the global information infrastructure. The basic GPS is defined as the constellation of satellites, which produce GPS signals, ground stations, data links in various command and control facilities, which are operated by the U. S. Department of Defense.
Although originally intended for military applications, in the 1980s, the U.S. government made a system available for civilian use. The GPS receiver must be locked on to the signal of the least three satellites to be able to calculate latitude and longitude. One of the latest developments is that of integrated, high sensitivity SiRF III receivers. These high sensitivity, receivers allow you to track and maintain a lock on several different satellites. In many cases, this results in a near instantaneous position reading. With four or more satellites and receiver can determine the user's altitude, in addition to their latitude and longitude. Newer GPS receivers with wide area augmentation system capability can improve accuracy to less than 10 feet.
As with all newer technology, there is a learning curve with GPS systems. First on that learning curve is determining what kind of unit to buy.
Buying a GPS System?
How to Decide What GPS System to Buy
How to determine what type and model of GPS to Buy? With so many choices, it can be a bit overwhelming to figure out what the best GPS receiver
1. What product level do you want? Do you need just a basic unit, or do you need multiple functions?
2. What about portability? Do you need to use the unit when you are walking, hiking or boating or flying?
3. What type of power source will you be using? Will you only be using it in a car, where you can access auxiliary power, or do you need a unit that runs on standard portable batteries?
4. Do you need mapping capability? Do you need Map data which can include a variety of details: street-level details, restaurants, marine or topographic data? A variety of software with mapping capabilities is available.
5. How easy do you need it to be to operate? Systems are available that provide tutorials, touch screens and turn-by-turn voice instructions.
6. How will the unit be mounted? Mounts are available for cars, bikes, motorcycles, boats or airplanes.
7. Do you need any special antenna configuration? Most GPS units have a built-in antenna, but others have the option of attaching an external antenna for better reception.
8. Pricing- Beginning entry level handheld GPS units start at $75. High-end sophisticated GPS navigation units with multiple map options can run as high as $800 to $1000.Why Buy a GPS Receiver?
GPS Navigation Systems for Your Car or Truck
Buying a GPS Receiver for Your Car
When choosing a GPS unit for your car, several things need to be taken into account. The size, display and where to mount it are important. As stated earlier, choosing the level of service and the options you need are keys to being happy with your purchase.Do you need traffic information for driving in a congested city? Do you prefer a voice navigation system that gives you turn-by-turn instructions? Do you want to have map data that includes locations of restaurants, shopping centers, hotels and such? If you want to take the unit with you when you go walking, it will need to be small enough to carry and easily removed from its mounting station in the car.
Topselling GPS Systems
Best GPS Systems for 2009
Garmin Oregon 400t Handheld GPS
Backpackers Award for Handheld GPS
The Oregon 400t lets you customize five profiles--automotive, marine, recreation, fitness or geocaching--making the most beneficial features for each activity the easiest to access through quick shortcuts. The tough, 3-inch color touchscreen display is easy to read even in direct sunlight, and the Oregon's easy-to-use interface means you'll spend more time enjoying the outdoors and less time searching for information.
Buy Now at Amazon and Save $50
* Rugged, waterproof handheld GPS with 3-inch color touchscreen
* Preloaded U.S. topographic maps, 3-D map view and a built-in worldwide basemap with shaded relief
* Wireless exchange of user routes, tracks, waypoints, geocaches and images
* Features microSD slot for easily updating maps; supports GPX geocaching files
* Extras include barometric altimeter, electronic compass, picture viewe
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