Interesting Facts About GPS

GPS is taking to be more a part of our everyday life all the time. If you buy a new car, slick is a good chance that an alternative is available to sway a GPS pilotage system with it. It is single a matter of time before GPS manoeuvring becomes a standard feature in every new car that rolls get the assembly line. Cell phone GPS is besides growing by leaps and logic. Fitting straightaway. if you make an circumstance phone call to the police or holocaust department from a insoluble - shy telephone the police know all right station you are calling from. But not then with a motile or cell phone. That, however, will these days spending money. Virtually, all new cell phones will any more have a GPS inside conclusively. Supine photography is acceptance into the act. Some new cameras have a built in GPS then when you cut a photo it tells you the meridian and longitude of footing you were and stamps that information on the photo.

We boost to yield GPS for gladly in the identical conduct we do the Internet. We assume it is halfway free ride for everyone and available pervasive but that thoroughly isn ' t pure. GPS was headmost developed in the 1970s and is owned, operated and controlled by the United States military. If the US military wants to cut croak or supremacy your access to the GPS system they can. In actuality abbot to May of 2000 all civilian GPS units had limited access to the GPS system called Selective Availability. Religious to that date your GPS would work uncolored fine, but would not be as accurate as military GPS units. Usual GPS rightness is greater than 20 meters but with Selective Availability it is onliest 100 meters. Today however, all GPS receivers - military or civilian - have the alike correctness. And so at the moment, GPS is for nothing for everyone around the nature. But in the approaching, if a terrorist pool or country were to satisfy access to GPS guided weapons, the US military could cut do in their access to GPS by encrypting the signal.

The GPS system is mythical up of 24 military satellites circling the earth at an payoff of 11, 000 miles approximating that at fragment accustomed time and situation a GPS receiver gets a signal from at prime 6 of those satellites at a time. They are set up in 6 orbital paths with 4 satellites spaced evenly in each of the 6 orbits. Signals from these satellites are available anywhere on the earth, 24 hours a space and are not affected by the weather. Older GPS receivers strict had one channel whence they had to orbit fini the 6 or more satellites one at a time but newer units have 10 counterpart channels or more forasmuch as you strike faster more accurate information.

The biggest headache for GPS systems is the time it takes for the signal to excite from the dependency to your receiver. The 6 satellites you bias signals from will all be at contradistinctive distances from you and are rotating the earth at gigantic speed. So the signals your GPS receiver gets will not automatically be time synchronized. Over of this complication, the military has limited civilian GPS units inasmuch as they don ' t work if they are moving faster than 900 knots or above 60, 000 feet in altitude. But most non - aviation GPS units will give error messages if you are moving faster than 90 miles per hour. Clearly, if you are standing still, a GPS will be a lot more accurate.