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A GPS Review of Facts By now, nearly everyone has heard of the Global Positioning System or GPS. of more than 50 satellites covers the globe to enable the GPS to work. To find the position of a GPS signal, at least three satellites have to be able to receive the signal. They then compare notes and triangulate the desired position. A GPS unit radios the time as correctly as its time piece can tell. The satellites that receive the signal compare the time sent to their own very accurate atomic clocks and figure the amount of time
it took to receive the signal, they compare their different amounts of time along with their positions and are able to nearly pinpoint the location where the signal originated. They can then transmit the longitude and latitude if three satellites received the signal and altitude if four satellites received it to the sending unit. This is a simplified GPS review. Possible Problems From the GPS review above, you can guess that the accuracy of the time piece in the sending unit can have an impact on the accuracy of the positioning information. Clock errors are not the greatest source of error, though. This part of the GPS review will explain the others. The most frequent source of errors is atmospheric. When the signal passes through the ionosphere to reach the satellites, it can run into conditions that speed it up or slow it down, affecting the time calculations. The chances for problems increase as the angle of the signal increases to reach a satellite. Fortunately, there is a way to correct this problem for the military, other government agencies and surveyors whose positioning signals are used for very important reasons. Your GPS review so far makes it evident that inaccuracies will occur if the signal is bounced around by skyscrapers, mountains, or other terrain. This will cause distortions similar to the atmospheric type and are also avoidable by systems more sophisticated than the consumer type. The next type of problem occurs because the satellite updates its position about every twelve minutes. If a signal reaches the satellite near its update time, the satellite won t know its correct position and make its calculation based on bad information. For most uses, these problems don t amount to much.
Making Your Game Better with Golf GPS Many people wouldn t think to associate golf with GPS
behind golf GPS technology are the same as they are with any other field in which GPS serves as a benefit. It is all about discovering where you are; so in golf that translates into discovering where you are, where your ball is, and where you are...
Setting Sail with Marine GPS A marine GPS can be the lifeline for your voyage if you find yourself
identify your exact coordinates based on a number of electronic calculations and come up with a strategy to get your vessel back where it belongs. This type of technology can be a vital part to your vessel s technological arsenal and can be...
Finding Your Blue Tooth GPS Receiver As if it weren t bad enough that we needed to figure out
blue tooth or not. Some people will tell you that you don t need a blue tooth GPS receiver but it never hurts to look to see if it is something you could need. When out hiking it s always nice to have that extra boost to your signal or help...
Using a GPS Navigator There is a right way and a wrong way to use a GPS navigator. The primary
location and position properly using global positioning software. This software could be integrated into your handheld unit or into your vehicles built-in unit. From there, the GPS zeroes in on your position using coordinates and you can then make...
A Few Reasons Why a GPS Map is better than a Traditional Map Going for a hike in the woods, or
accurate map that can show you the locations of various landmarks, the lay of the land, or the network of routes can be a lifesaver when it s late in the day or your feeling tired. There are many choices for maps out there, including a...
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