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cekyophr5
Posted: Wed 12:40, 18 Sep 2013
Post subject: giuseppe zanotti sneakers How GPS Trackers Work
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Submitted : 2011-10-26 00:00:00Word Count : 480Popularity: Not RatedTags: gps trackers
How GPS Trackers Work
A GPS device can track a person with this technology anywhere in the world. GPS, which stands for [url=http://www.mquin.com/giuseppezanotti.php]giuseppe zanotti sneakers[/url] Global Positioning System, is increasingly being added as a feature in new cars and phones. It is very useful for figuring [url=http://www.davidhabchy.com]barbour sale[/url] out directions while driving, which is one of the most common uses. Another use is for tracking a person or goods, when GPS is placed in a vehicle. A sport known as geocaching uses GPS to find specific locations where those who visit can leave items and notes or find things left by other 'geocachers'. Although it is becoming an extremely common technology used in everyday life, many people do not know exactly how GPS trackers work.
[url=http://www.rtnagel.com/louboutin.php]louboutin[/url] GPS tracking works by triangulating location coordinates using satellites. There are 27 satellites currently orbiting the Earth used for this technology. There are 24 operational satellites [url=http://www.ilyav.com/uggpascher.php]boots ugg pas cher[/url] and 3 [url=http://www.sandvikfw.net/shopuk.php]hollister sale[/url] that will become operational if one or more of the working satellites shuts down. Each satellite weighs between 3,000 to 4,000 pounds and circles the Earth about twice per day. A GPS-enabled device finds several these satellites, calculates the distance to each using transition time, and uses these calculations to pinpoint where a person is located. This process of calculating location using geometrical points is known as trilateration. A fully functional device needs to be able to transmit as well as receive a satellite signal. GPS trackers can track not only real-time location, but also velocity and historic location.
There are two types of GPS tracking: active and passive. Passive tracking simply stores the data [url=http://www.maximoupgrade.com/hot.php]hollister france[/url] on location in the device which then can be later downloaded into a computer. This type of tracker is often used for bikers [url=http://www.mansmanifesto.fr]doudoune moncler homme[/url] or joggers who are simply trying to determine the distance that they went during exercise. Active tracking sends the location in real type to a central tracking system. Active tracking is useful for tracking goods and people, and it is therefore most used in [url=http://www.sandvikfw.net/shopuk.php]hollister outlet sale[/url] commercial settings. Some parents are even equipping their children with GPS watches so that they can monitor their child's whereabouts no matter where that child goes.
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