Curious about GPS

GPS is increasingly becoming part of our everyday lives in time of all. If you buy a new car part, chances are good that there is an option available to a GPS navigation system. It 's just a matter of time, GPS navigation is a standard feature in every new car that comes out of the line assembly. GPS mobile phone is growing leaps and bounds. Right now. If you call an emergency telephone at the police department or fire from a hard -wired phone the police know exactly where you are calling. Not so with a cell phone or mobile phone. But this will change soon. Virtually all new GPS phones soon in somewhere. Photography is also getting into action. Some new cameras have a GPS installed, so if you have a photo stamp that tells you the longitude and latitude, where you were and that the information on the photo.

We tend to take a GPS with the same conditionswe do on the Internet. We assume all users free of charge almost everywhere, but that is not true. GPS was developed in 1970 and is owned, operated and controlled by the U.S. military. If the army wants to cut U.S. access to or control of the GPS system they can. In fact, before May 2000, all civilian GPS units had limited access to the GPS system called Selective Availability. Until then, your GPSwould work, but it would not be as precise as military GPS devices. Normal GPS accuracy greater than 20 meters with Selective Availability is only 100 meters. Today, however, all GPS receivers - they have the same precision military or civilian -. So at the moment, GPS is free for everyone around the world. But in the future, if a terrorist group or country of a weapon in an attempt to access the GPS, the U.S. military was able to cut their accessGPS encrypting the signal.

The GPS system is the height of 24 GPS satellites around the Earth in an army of 11,000 miles, so that at any time and the location of a GPS receiver receives a signal of at least 6 of the satellite at a time. They are in 6 with 4 satellite orbits uniformly distributed in each of the six lanes. Signals from these satellites are all over the world, 24 hours a day and are not affected by the climate available. Older GPS receivers had just one channel, so they had to pass six or more satellites at a time, but newer units have 10 parallel channels or more, in order to get accurate information more quickly.

The biggest headache for GPS systems is the time when the signal from the satellite receiver to get to you. The 6-satellite signals are at different distances from all of you and rotate the earth at high speed. Then the signals of your> GPS receiver does not synchronize the time automatically. Because of this problem, the military limited civilian GPS units, so it does not work if it is faster than 900 knots, or approximately 60,000 feet above sea level. But most non-aviation GPS units are error messages when you move now, faster than 90 mph. Of course, if you remember that GPS is a lot closer to.

Thanks To : Magellan RoadMate 1424 Garmin GPSMAP 60Cx