The U.S. air force's GPS jammer test

Cell phone jammer is a piece of equipment capable of blocking reception or transmission of cell phone signals. This is mostly done by creating some form of interference at the operating frequency ranges of cell phones, which results in no signal or significant loss of signal quality

Communication jamming devices were first developed and used by military. This interest comes from the fundamental objective of denying the successful transport of information from the sender (tactical commanders) to the receiver (the army personnel), and vice-versa.

One way to stop these disrupting ringing is to install a device in such places which will inhibit the use of mobiles, i.e., make them obsolete. Such a device is known as cell phone jammer or "GSM jammer", which is basically some kind of electronic countermeasure device.

The U.S. military is worryingly dependent on GPS. Our global positioning satellites tell planes where they are, provide targeting info for smart weapons, and support communication and navigation systems. But in a war with a tech-advanced adversary—think China, Russia, or Iran—GPS could become a big liability because it could be signal jammer, spoofed, or outright destroyed.

In 2013, the service developed a system called Simulated Programmable Aircraft-Embedded Jammer, which can realistically simulate GPS jamming on one plane's equipment without affecting others.

During the latest US Air Force drill started last Friday till February 18, fighter pilots will be tested if they can carry out operations successfully when the satellite positioning signal is jammed.

According to a web article from Chicago radio The Drive, the military has implemented a jammer that may be capable of meddling with the signal in the whole western US.

The Drive explains why the USAF is determined to use GPS spoofing and jamming technology but offers no insight into what a GPS blackout might mean for the millions of civilians who live in the Western region of the US.

GPS denial is a becoming a huge issue for American military planners. Peer states, especially Russia, are already putting GPS spoofing and jamming tactics to work during various training events near their own borders. We have discussed this situation in great depth before, and I would suggest you read this article to understand just how deeply the loss of reliable global positioning system data can mean for the U.S. and its allies during a time of war, as well as what is being done to overcome such a monumental hurdle.

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