GPS, GSM Cellphone Jammers Hit Mainstream, Calamity Ensues

This image was lost some time after publication, but you can still view it here.
This image was lost some time after publication, but you can still view it here.

Don't get too reliant on that GPS receiver, Magellan, since companies are now starting to release devices that locally block GPS signals. Detectnu's device not only block GPS signals within a 50-meter (164-foot) radius, but also GSM cellphone signals in a 20-meter (65-foot) radius. Another such device—the RJ-G1575 GPS jammer from Radixon Hadrian—blocks GPS signals in a 50-kilometer (31-mile) radius. Now, I can completely understand cellphone jammers (hint: people have no concept of tact in New York City and love to yap about God knows what quite loudly), but blocking GPS? What good does that do, other than give mischief makers a rise?

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Ok, so Radixon Hadarian claims that the device can be used to thwart GPS-aided terrorist attacks. Yes, and I'm Jack Bauer. Let's leave the crime fighting to the professionals and not to gadget geeks.

Detectnu GPS/GSM Jammer [Alibab.com]

Radixon Hadrian RJ-G1575 [Grove Enterprises via The Red Ferret Journal]

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DISCUSSION

This is going to be interesting, given that the FAA is moving ahead on certifying fully-GPS IFR navigation and autopilot systems for aircraft and even autolanding within the CONUS, if I recall recent press releases correctly. I'd bet use of any of the GPS freq. systems anywhere *NEAR* an airfield would get you in serious, serious trouble.

On another note, it's not nearly as hard to defeat GPS jamming, especially single-point, as it sounds, particularly for aircraft but for ground receivers as well. The reason for this is that the true signals will always be coming from, well, upwards. The jamming source won't. You can separate the signals with physical mods to the antenna. Also, I'd guess that while you couldn't necessarily eliminate a much stronger local source, you could most likely get enough of a signal separation to subtract the local jamming source from the total signal electronically, leaving the satellite signals intact.