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GPS - Global Positioning System - Treasured Navigation toolBY: JNLakshmi | Category: Technology and Computers | Post Date: 2008-10-12
Carrying the maps during your travel, or taking the print out of the directions from Internet is now old fashioned. GPS - Global positioning system is a device that is used to give accurate positioning during navigation. It is the map that goes around with you where ever you are moving. GPS was developed by U.S Department of defense in the year 1973 for military purposes. But now, it is widely used as navigation tool in cars, airplanes and has several other uses. How does GPS work? GPS satellite system consists of 24 satellites that orbit round the earth that send radio signals to earth that contain information about the satellite. The GPS receivers uses these signals to determine the receivers position showing the latitude, longitude and height (3D position). GPS receiver compares the time a signal was transmitted by a GPS satellite with the time it was received. The time difference tells the GPS receiver how far away the satellite is. Basically, the users position is calculated from distance measurements to satellites. GPS receiver can calculate other information like distance to destination, time to reach the destination etc with the distance information from few more satellites. The the GPS receiver displays all the available information on the the screen of the device. Auto GPS navigation: Auto GPS is the most popular use of GPS used in the cars. Brands such as Garmin, TomTom and Megellan dominate the industry. Magellan was the pioneer car GPS navigation. The auto GPS navigation requires the map database. This converts the GPS portable systems coordinates into map locations, such as street names and city. The information in the database, directs you to your destination. -When you enter the address of your destination, they tell you exactly how to reach your destination by giving you precise directions. -Many GPS navigation devices come with pre-loaded maps. You can also download the maps from the Internet to the GPS. -Search for a particular destination can also be done by narrowing through the categories like malls, grocery store, restaurants, ATMs etc, if you do not know the address. -Most lovable feature is that the GPS navigation device speaks directions. The convenience of voice navigation allows you to concentrate on driving. -The touch screen technology that helps you to operate the device with just your finger tip. -It calculates and let you know the time, at which you will reach your destination. -It shows the exit point of interest for rest area, gas station, restaurants, motel etc -It spares your gas, by taking you to the right place without hassle. -There are several websites that give you free download of GPS maps. Travelbygps.com, garminmapsearch.com, I love, when it says 'You have arrived'! With the technology of auto GPS navigation growing rapidly and more features coming up, may be very soon, it is going to become a standard feature in the car. Cell phone GPS is also growing widely these days. Will GPS work in India? MapmyIndia.com offers the equipment and the detailed map. The device is offered by Delphi and the price ranges from Rs 20,000 onwards. GPS bought in USA will have the US base map loaded in its map database. But when you load, maps of India, like the cities of Chennai, Delhi etc, then it will work. You can buy the maps in the internet sites like eBay which costs $40 or so for a map. Other uses: Apart from the auto GPS navigation which is widely used by the civilians, GPS is also used for outdoor recreational activities such as hiking, kayaking. It is used in agriculture to monitor the application of fertilizer and pesticides. In the aviation, it provides accurate aircraft position.Meteorologists use it for weather forecasting and global climate studies; and geologists can use it as a highly accurate method of surveying and in earthquake studies. In marine, for traffic routing, underwater surveying etc. GPS tracking device is used by the commercial trucking companies, parents can track to determine their kids Article Source: http://www.saching.com About Author / Additional Info: JNLakshmi Additional Articles: * Is Raksha Bandhan or Rakhi loosing its true meaning? * Sachin Tendulkar: Is he the best cricketer ever? * Play on Staffing process * Women In Construction Trades - Construction jobs for women * Does God really care about us? Does this article violate or infringe on your copyright ? It is a violation of our terms for authors to submit content which they did not write and claim it as their own. If this article infringes on your copyrights, then use our Contact us form with the detailed proof of infringement along with the offending article's title, URL and writer name. If you do not hear back from us then contact us again in another 10 days. Thank you. Comments on this article: (0 comments so far) * Additional comments are now closed for this article *
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