TAG: jamming

State Department issues notice on North Korean jamming

April 8, 2016By

On April 7, the U.S. Department of State issued a notice about the recent jamming experienced in South Korea. Korean Peninsula GPS Jamming Notice A continuing series of incidents have been reported in the general location of Incheon, Republic of Korea and the surrounding Gyeonggi and Gangwon provinces out to approximately 100 nautical miles beginning on or about 0000Z31March16. The... read more

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South Korea issues warning over suspected North Korean GPS disruption

March 31, 2016By
SouthKorea-Seoul

South Korea issued a warning Thursday after detecting satellite signal disruptions that appeared to be coming from North Korea, according to the Korea Herald. The capital city of Seoul appeared to be the target. Officials said North Korea discharged a large amount of radio waves to jam GPS signals in the region. “We’ve detected signs that North Korea has been... read more

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GPS recruits: Uncle Sam wants your ideas!

January 27, 2016By
Uncle_Sam_(pointing_finger)

The GPS modernization funding picture cannot be called bright, yet neither can it be characterized as dim. While big money for big projects appears hard to come by, the U.S. government and military offer many smaller allocations to help fill the chinks in GPS armor. Such initiatives concern jamming, PNT solutions in GPS-denied environments and other conundrums. A run of... read more

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US Coast Guard issues GPS jamming alert

January 23, 2016By

The U.S. Coast Guard issued a safety alert on Jan. 16, warning mariners of the potential detrimental impact to navigation caused by GPS interference or jamming. The warning emphasizes the importance of understanding how vessel equipment could be impacted by the loss of a GPS signal. The Coast Guard states that this past summer, multiple outbound vessels from a non-U.S.... read more

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Combat jamming with adaptive notch filtering or wavelet mitigation: a comparison

January 14, 2016By
Power Spectral Density comparison (fs=112 MHz; fif=28.42 MHz; Bif=30 MHz).

Wavelet Packet Decomposition (WPD) shows promise as an anti-jamming tool. The WPD is derived from the wavelet transform, which provides a representation of the signal components in a domain spanned by a set of functions that can be seen as band-pass filters with a bandwidth decreasing as their central frequency increases, thus granting a uniform resolution in the decomposition of... read more

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PNTAB and eLoran in the People’s Republic

November 11, 2015By
Boulder Colorado Flatirons. (Courtesy of Wikipedia)

That is, in the People’s Republic of Boulder, Colorado. To those of us who live in Colorado, Boulder is known by this seemingly timeless but absolutely accurate appellation. This stunningly beautiful city located in the foothills of the Rocky Mountains, known as the Flatirons, is where the National Space-Based Positioning, Navigation and Timing Advisory Board (PNTAB), which provides independent advice to... read more

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Highlights from the Grand-Daddy of All GNSS Technical Conferences

September 23, 2015By
Harxon-antennas-and-radios-W

The ION GNSS+ 2015 Conference once again fielded a jam-packed agenda of papers on subjects  from world-wide constellation updates, through GNSS integrity, indoor navigation demonstrations, multi-constellation/function chipsets, interference mitigation and jamming detection, privacy issues, and many other very interesting subjects.   That’s GNSS+ in the conference name, as in “plus,” denoting the many other positioning, navigation, and timing technologies it covers.... read more

TAG’s Military Survey System on Display at ION GNSS+

September 2, 2015By
TAG-PPS-GPS-S

Technology Advancement Group (TAG) will be showcasing precision, navigation and timing technology integration solutions at the ION GNSS+ conference, which will be held Sept. 14-15 in Tampa, Fla. In particular, TAG will display a custom-designed military GNSS survey system that is the U.S. Army program of record for geodetic, construction and airfield surveying. TAG’s Precise Positioning Service Global Positioning System Survey (PPS GPS-S) system was designed specifically for... read more

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