Blog Editor's Note: GPS jamming is illegal. And if you are willing to engage in one illegal activity, you are more likely to engage in others.  Especially if the first is GPS jamming and it will help cover up your use of the company van for personal business. But for...

Blog Editor's Note: Here is another good case study from Chronos Technology. Lessons learned: Monitor your systems Have multiple sources of time for networks Be able to detect and geolocate disruption sources Thanks again to Chronos! GPS Jammers used to defeat...

Notice from US Coast Guard Users of the Global Positioning System (GPS) may experience a short period of high Horizontal Dilution of Precision (HDOP) / Position Dilution of Precision (PDOP) in the locations below at the times indicated due to satellite maintenance...

Blog Editor's Note: GPS is an invisible utility that underpins most every networked technology. All nations must get better at preventing, detecting and stopping these kinds of disruptions. In Europe the STRIKE3 project's limited sampling has discovered 300 "jammer...

Blog Editor's Note: There are some in the GNSS community who think that the only answer needed for resilience is use of multiple GNSS frequencies and/or constellations. This is problematic as all constellations use the same frequency band and can be easily jammed at...

Blog Editor's Note: While this article does not provide our readers a lot of new information, it is a good reminder and summary of the current state. It is also an indication of the growing awareness of this vulnerability and the need to address it. And, if this is a...

Blog Editor's Note: In a recent GPS World article on it's interference detection system, NovAtel included three examples of GPS signal disruption that have been detected by its system.  We enthusiastically support broad sharing of these kinds of case studies to...

Blog Editor's Note: This report coincides with information being developed by Europe's STRIKE3 project. See, for example, the information they presented at the most recent PNT Advisory Board Meeting in Baltimore. AIN On Line GPS Jamming and Spoofing On the Rise...

Come to Japan for a global conference on Resilient Navigation - papers and presentations wanted! The quadrennial World Congress of the International Association of Institutes of Navigation is happening this year in Japan and the theme is Resilient Navigation. Both...

Blog Editor's Note: In a recent GPS World article on it's interference detection system, NovAtel included three examples of GPS signal disruption that have been detected by its system.  We enthusiastically support broad sharing of these kinds of case studies to...

Blog Editor's Note: In a recent GPS World article on it's interference detection system, NovAtel included three examples of GPS signal disruption that have been detected by its system.  We enthusiastically support broad sharing of these kinds...

Blog Editor's Note: A recent article about South Korea's budding eLoran system and a presentation at the recent IALA Conference in Inchon is only available in Korean. The Google Translate version quoted from below clearly skews a couple ideas moving them from Korean...

Blog Editor's Note: Interesting article from GPS World on NovAtel's method of locating GPS/GNSS disruptions. The article also has three great examples of use cases which we will feature, each in its own post. NovAtel's is one of several such products and services...

Western governments have generally shown little concern about GNSS vulnerabilities and their countries' critical dependence upon them. Not so for some others. Iran has announced that it has a Loran system to prevent its dependence on space. Saudi Arabia has had a...

Blog Editor's Note: This could be an interesting event. It seems as thought it is structured around signals of opportunity, re-purposing existing RF wave-forms, and discovery of new signals for PNT. These certainly seem less expensive and more resilient that putting...

Blog Editor's Note: The attached paper presented at a recent IALA meeting shows South Korea's eLoran project on schedule. While the UK eLoran system found 6 - 7 meter positioning accuracy, to date the S. Korean project has calculated 10m or less for many areas, but...

Blog Editor's Note: The author comments in the below story that this report has been "long awaited." Very true. The administration is proceeding very slowly, though hopefully deliberately, on this issue. The FCC seems to move even more slowly on issues related to...

Blog Editor's Note: Wishing everyone a wonderful Memorial Day holiday.  Keep in mind the sacrifices of the fallen and, if you are on the road, safe travels.