The Department of Defense originally developed Global Position System (GPS) as a military system. Selective Availability (SA) was employed by military to degrade the signal globally for national security reasons.
On May 2, 2000, Bill Clinton switched the satellite of GPS (Global Position System). Improved technologies allowed GPS every civilian GPS receiver around the globe to downgrade the signal’s quality on a regional basis. Users will be able to pinpoint locations up to ten times more accurately then they used to do.
GPS does not just tell the user which street they are on, but what part of the street they are on. GPS made the paper map obsolete. Another revolution in Geo Location Accuracy has changed meter level positioning to cm level or even mm level positioning.
Professor Robert Langdon is working on GPS dot which is a tracking device accrued within 2 feet anywhere on the globe. GPS dot was impossible. One reason for impossibility of GPS dot was that GPS did not work indoors. And the other reason was that they could not make a GPS device that small.
But the GPS receivers which were recently released, are in the size of CM and more sensitive than ever before. Now GPS dot is possible in the real world, not just in science-fiction movies. We can buy GPS dot in bulk and stick them on anything we want to track. For example, you can stick a GPS dot on your wallet and never lose your wallet or you would never lose your child in Disneyland.).
The advantage of GPS dot:
· More sensitivity
· Size
· User won’t lose anything.
There are several tools to fool a GPS signals. One effective way is using a device named Wave Bubble. Wave Bubble is unopened GPS jammers which Lemur Freed developed. This device cleans personal space. It creates a bubble around the user which the GPS signal cannot penetrate.
The other tool to fool a GPS signals is the GPS Spoofer. This device does not jam the signals but fools them.
Reference:
http://www.ted.com/talks/todd_humphreys_how_to_fool_a_gps.html
http://www.rbbi.com/news/2000/gps1.htm
http://www.navigadget.com/index.php/2007/10/08/another-gps-gsm-jammer-wave-bubble
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