GPS is useful in many parts of life. But it there are many problems with, first you need many satellites that it is able to work. Then there is also a problem of safety and it isn’t always exact enough.
The satellites are about 220 000km in the sky, and only a weak signal comes from them to the earth.
Jamming satellites with interfering signals are increasing, even methods are developed that the receiver display shows that what somebody want. But now that is only possible for a view people, but in some years that technology could get into the hand of criminals.
GPS was developed by the US army. And military systems use also this jamming. In the internet you can buy also “jamming” systems for less than 100€, they work about for an distance from 10 kilometers. High – Power versions are more dangerous for the GPS and the mobile telephone frequency. Specialists are afraid that such equipment could fail into the hands of criminals, in addition to fake receivers. That is called spoofing, eat means to simulate the GPS signal and then to change it. Satellites send many different signals to earth, only one is for public use. For the military is also a crypted signal available. I think that that is very difficult to fake, but there is also the problem of jamming. Jamming means to confuse the GPS signal in order not to catch any signal. For this problem they developed special antenna which are able to filter signals from the earth. Because there is a different angle to the receiver because they have an Position on the earth.
Especially for ships it becomes dangerous. A first class cargo, could managed to an dangerous place and then robbed. Hackers are a big danger to ships because they get feed over the oceans by GPS signals.
Mow you can see GPS as a computer before the first virus and to less people care really about it
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Ich weiß wie viel Arbeit, dass anschauen ist und bin über jedem Vorschlag froh welcher mir Hilft den Text zu verbessern
mfg thomas
