Many people use a GPS, (Global Positioning System) without even knowing what makes them work. They do know one thing though; that it helps them to find their way back when they discover that they are lost. It is good to know a little about what makes a GPS work and how to ensure that it is working effectively for you when you really need it.
The Global Positioning System was originally designed and developed by the U.S. Defense Department for military use in their planes, submarines and ships. Now, car GPS receivers are used in military land vehicles like jeeps and even tanks. Soldiers in all branches of the military use portable hand held GPS receivers to find their way back to their troops if separated from them, and for alert of the presence and location of opposing military troops. They are also used by police and ambulance services for many different reasons. Although very effective at this time, scientists are constantly working on ways to improve the system. Also now, with the advancements in technology these days, the Global Positioning System has been made available for use by the public.
The GPS systems that we use are actually receivers. For them to work to our advantage, they receive signals that are transmitted from satellites placed in the orbit of the earth. The actual Global Positioning System itself consists of those satellites, 24 in total and orbits the earth two times every 24 hours. The GPS receiver works 24 hours per day and in all kinds of weather. Be aware though, that for the receiver to work effectively there has to be a clear view of at least three satellites. In other words, if you are lost out in the hills, a thickly treed area will most likely restrict the accuracy. Big buildings are an inhibitor also, so moving to an area where you have a clear view of the sky provides the best advantage. Car GPS receivers require a view of four satellites minimum to work effectively.
Portable hand held GPS receivers are lightweight, convenient and provide accurate information just a well as car GPS receivers. Both work in the same way by receiving transmission from the satellites. Not only do they tell you where you are, they also tell you how to get where you want to go and can provide you with information about the easiest and quickest routes to take; along with letting you know how long it will take you to get there depending on which route you choose. All this is done through the work of the GPS satellites. Other information the receiver can provide for you is of road hazards and backed up traffic on the roadways, eliminating being stuck in road construction zones or peak commute traffic. Again, all this information provided to you from your GPS receiver is given by signal transmissions sent from the Global Positioning System satellites that are orbiting the earth 24/7.
Whether you are using a GPS to find your way out of the woods, find a lost child or the quickest and safest route to your travel destination, rest assured that those satellites are doing a high-end job for you.
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