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What is global positioning systems?
A global positioning system is a system to help navigate where you are on the planet. It is guided by satellites and works in any type of weather.
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Advantages of GPSDepending on what you are using it for, and the rating of your system it could be invaluable. I have a hand held and lap-top connected GPS. The advantages of …having either is determining your exact position. While traveling through Albany, GA, I became lost. Looking for a place to pull over and ask directions (late at night) very few places were open. Liquor stores--OUT, bars--OUT, I needed a place that would be knowledgable and safe. I saw a Dominoes delivery place...who better would know their way around town than a pizza delivery joint? The guy gave me excellent directions...to the hood! OK, I needed a place that was knowledgable, safe and trustworthy. I saw a cop at a 7-11 and found out I was headed for "gang land" (his words). After that, bought a middle of the road hand held GPS from Wal-Mart, and never again pulled over. I've also used it on camping and canoeing expeditions. Consider it the "cheaters" map. The advantages of GPS over a map is 100 fold, GPS is not infoulable though, the military can turn off the satelites or render them "not as accurate" for a number of reasons, most importantly to render enemy GPS guided munitions inoperative. Having an understanding of maps is always a good back up. A friend of mine obtained her private pilots license and innappropriately used GPS for guidance. When the batteries failed, she was lost. One of the Best Advantage is that Using GPS , one can locate any gps devicce which is connected through satellite . Almost Every Country uses this technology from crime field to intelligency fields .
Answer . is used for the scientist to look in globe
ADVANTAGERS AND DISADVANTAGERS OF GPS i dont no why do you ppl have so many questions?
For the gps global position system, the satellites orbiting Earth is the basis. Each satellite orbits earth twice a day on one of six separate orbital paths. The Department of… Defense created the system, which was originally for military purpose. In 1983, the civilians got the right to use the system after many practical application stem from its infrastructure. All the satellites transmit the signals down to Earth in the global positioning system. Each satellite is programmed to send the signals at the same time. The signal contains the digital information about the satellite's identification and position. The information transmission time is very important. Each satellite is set up the time and the time is extremely precise. Your car's satellite gps receiver could receive the satellite transmissions if it has a clear view of the sky, not blocked by the solid object like building or mountains. There should be a time difference form the signal was sent when the gps unit receivers the satellite signal. Because the signal need to take time to reach your receiver. But the receiver could automatically calculate the distance to the satellite by the simple formula of speed×time=distance. As the satellite transmissions all travel at the speed of light, which is already known. You can not know where you are if you just know the distance to one satellite. The information just tell you that you are somewhere within a sphere around the satellite. So gps must use trilateration. The trilateration equates to using the distance to at least three satellites to determine your position. Three satellites could convey an accurate two-dimension fix, giving you your longitude and latitude coordinates, and four satellites give a three-dimension fix that includes elevation. Basically, the more satellites are used, the more accurate location is. Gps satellite orbits were designed in such a way that you will always have an effective, clear path to at least four satellites. The coordinates is not very helpful when you are in a car. Nobody will use coordinates to give directions or to navigate highways and roads. This is the map software's use. It like a paper map, including the detailed information on the roadways and features of a given area. The map companies are constantly updating the digital maps to provide the most accurate mapping possible. The gps unit is able to overlay your location onto the map and provide turn-by-turn directions with the map data.
Cost Purchasing a GPS based on price can be a major disadvantage. If you purchase a "bargain GPS," you will get what you pay for, and features such as traffic and up-to…-date maps could be lacking. Reception GPS devices are limited by having clear access to the satellites that provide the tracking. In locations with tall buildings or sparse coverage, reception can be poor. Directions Turn-by-turn directions are not available on every type of GPS device. Some will give very little advanced notice before an upcoming turn. Accuracy Maps on GPS devices are not updated in real time for all models. This means that it is possible a GPS device will direct you onto a road that is closed or no longer exists. It could also miss new roads and businesses. Battery Life GPS units that are not plugged into a power source, and rely on batteries, which can drain quickly. This can increase the cost of owning a GPS unit significantly
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They calculate the time difference for signals from different satellites to reach the receiver.
Global Positioning System has numerous applications. The earliest application was military. Boaters were the first civilians to use GPS extensively for navigation, as dead rec…koning is prone to error. Many high-end cars have a GPS navigation system which serves much the same purpose as a marine GPS. Some athletes are turning to GPS to track speed and distance. A few digital cameras have a GPS receiver which records the location where the picture was taken. So far, I've listed only one-way applications. Two-way applications include cell phones when calling the emergency number and vehicle tracking.
military navigation and missile guidance system. They just let us use it until they need it for war.
global positioning system helps us to find where we are on earth. in short it is also called (GPS)
you can navigate...
Go places with it. Type in a address or use a P.O.I. to get you to where you want to go.
The global positioning system (GPS) is a series of satellites in orbit around the earth, that can "talk" to any GPS receiver on the ground, and that receiver will show it's lo…cation on earth to withing about 20-30 feet in any direction. Also, a particular place one visits (an especially beautiful spot in the woods, for instance) can be stored in the GPS memory, and you can always find your way back to those coordinates exactly again. It has hundreds of uses for regular people, as well as Police, Fire and Emergency personnel.
GPS provides position/location information. It is similar to that the phone company can track you phone location with the signal strength received by at least 2 cell phone tow…ers. If only one cell phone tower, the phone signal can only be interpreted as that the phone is somewhere in the circle of a known radius, assuming at ground level. With two cell phone towers, the phone signal can be narrowed to two possible locations. With three cell phone towers, the phone location is narrowed down to a small region, say within a city block. In the GPS, the cell phone towers are replaced by satellites. A hand-held GPS unit can use the signals from 4 satellites to calculate the coordinates (x,y,z) of the location and also how fast the unit is moving.
GPS is a system of several components: Land Component - ground stations in El Segundo, CA operated by the US Air Force. Monitors, tests, and updates satellites to correct for… drift, orbital error, etc.Space Component - 24 satellites.User Component - receivers that decode satellite signals and use the coordinates obtained for various purposes.