TAG: jamming

Anti-jam systems: Which one works for you?

June 14, 2017By

In my April column, I introduced the basic concepts behind GPS anti-jam technology, along with a bit of history around its evolution. I knew this was a popular topic, but I didn’t anticipate the enormous amount of positive correspondence I’ve received since, including many inquiries about where to buy this technology and who is entitled to have it. So this... read more

eLoran and Loran testing underway in late June

June 5, 2017By

The Loran sites at Havre, Montana; George, Washington; and Fallon, Nevada, will continuously broadcast from 0900 (MST) June 20  through 1200 (MST) on June 30. The sites will operate on the 5990 rate but occasionally may operate at other rates. Only the site at Fallon will operate as an eLoran site. The sites at Havre and George will operate as... read more

This article is tagged with , , and posted in Featured Stories, GNSS, Latest News, Transportation

Spirent helps civil aviation industry respond to GNSS interference threats

May 26, 2017By

Spirent Communications plc is offering a solution that enables the civil aviation industry to evaluate the growing threat of GNSS interference, jamming and spoofing. The new GSS200D Interference Detector was developed as part of Spirent’s partnership with Nottingham Scientific Limited. As skies and airports become more congested, there is increasing pressure on airports to be safely accessible at all times —... read more

Continental Electronics patents new eLoran transmit method, system

May 8, 2017By

Texas company Continental Electronics has patented a transmitter system and method for construction of low-frequency antenna towers significantly lower in height than previously needed for identical coverage. “One obstacle to deploying eLoran systems has been the sheer height needed for the transmission towers, each of which requires significant acreage,” said Mike Rosso, vice president of Dallas-based Continental Electronics. “Tower height... read more

This article is tagged with , , , , and posted in GNSS, Latest News, UAV/UGV

Anti-jam technology: Demystifying the CRPA

April 12, 2017By

Controlled reception pattern antennas (CRPAs, pronounced “serpers”), adaptive antennas, null-steering antennas, beamforming antennas… You’ve probably heard of at least one of those terms in any discussion around GPS anti-jam technology for defense. Because they are all terms that describe essentially the same thing: a specialized antenna that helps protect GPS receivers from interference and jamming. But what exactly are they? Where... read more

This article is tagged with , , , , , , and posted in Defense, Opinions

Raytheon, US Air Force upgrade navigation in decoy-jammer vehicle

March 1, 2017By

Raytheon Company and the U.S. Air Force validated performance of an upgraded navigation system for the Miniature Air Launched Decoy-Jammer (MALD-J) in six flight tests from B-52 and F-16 aircraft at White Sands Missile Range, New Mexico. The system upgrade, designated as GAINS II (GPS-Aided Inertial Navigation System), includes an enhanced multi-element GPS-controlled antenna assembly. The new technology improves MALD-J... read more

This article is tagged with , , , and posted in Defense, Featured Stories, Latest News

Friday is deadline for GPS OEMs to join live-sky spoofing event

March 1, 2017By

Friday is the deadline for GPS manufacturers to apply to test their equipment at a special event with live-sky test scenarios focused on spoofed GPS signals. The Department of Homeland Security (DHS) Science and Technology Directorate (S&T) is offering an opportunity for manufacturers of GPS equipment used in critical infrastructure to test their products against GPS jamming and spoofing. The GPS Testing for... read more

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Research Online: Narrowband interference mitigation, spoofing interference classification

February 27, 2017By

Get a rundown on two GNSS presentations: one on narrowband interference mitigation and on on spoofing, jamming and multipath interference classification. read more