The GPS satellites transmit two low-power radio signals, designated L1 and L2. The civil GPS uses the L1 frequency of 1575.42 MHz in the UHF band. Signals travel through the line of sight, meaning they will pass through clouds, glass and plastic, but will not pass through most solid objects, such as buildings, mountains, or underwater.
As the dependency on GPS systems continues to grow, some users are concerned about tampering that could disrupt the accuracy of the system. And the information collected seems to be more important, the GPS unit may be disturbed by the signal jammer,the government has forbidden the GPS jamming.
Why do people use GPS jammers? There must be some reasons.
Law enforcement agencies use the GPS system to track and monitor the release of sexual offenders or violent offenders. They use desktop GPS software to track their movements instead of making house visits, but to warn them if a parole is somewhere that they should not.
Fleet managers use GPS tracking as an anti-theft device to protect assets, lower their insurance premiums, and if assets are stolen, asset recovery is improved.
Fleet managers use these devices to monitor unauthorized use of corporate vehicles after hours or outside the designated area.
More and more suspicious spouses secretly track their partners to confirm their whereabouts and verify their story.
So in these cases, there is a very real possibility that the person being tracked would be happy to disable the device and there are many gps jammer for sale on line. It would seem difficult to prevent them from buying the GPS jammer.
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