Blog Editor's Note: Everyone agrees that the DoD needs to exercise to stay ready and defend the nation. At the same time, commercial aviation companies have businesses to run, customers to serve, and costs to control. Aviation operations are not as efficient, and some...

Blog Editor's Note: A couple interesting things about this. First, while the event was put on by the Royal Institute of Navigation, it was sponsored by two government agencies. Further evidence of the UK government's seriousness in addressing this issue.  Second, the...

Blog Editor's Note: It's interesting that the rouge antenna was about 60ft away from the antenna it was jamming. Also that fixing the problem automatically improved service to the company's customers. The Equinix LD4 Data Centre in Slough had been suffering...

Blog Editor's Note: Improving the way we are organized to better focus on space is a good idea. But the real underlying threat to the nation is not that we are poorly organized. It's that we critically depend on our space systems, and they are very vulnerable....

Two perspectives on the role and importance of timing in electrical grid operations were on display in San Jose the week before last. One presentation was at the NIST Assured Access to Accurate Time Workshop  and was by the Electric Power Research Institute. It said...

Blog Editor's Note: The Department of Homeland Security is hosting another opportunity for equipment manufacturers to evaluate their equipment's performance during live disruption conditions. This could be a valuable opportunity for some to...

Blog Editor's Note: A good case study below from Orolia. Of particular note is the comment that: "Though the timing system used time servers that had internal atomic clocks and could operate through a temporary loss of the GNSS signals, this datacenter was critical...

Blog Editor's Note: Why do we keep posting these things? Doesn't everyone know that there are tens, if not hundreds, of thousands of GPS signal jammers out there being used by everyone from delivery drivers to Mafia bosses?  So what? No one has died!  Nothing really...

Blog Editor's Note: Whenever there is a new IT utility, it seems there are always a lot of very beneficial unintended uses that were not originally contemplated. This is an excellent example. South Korea to Make Waze, other Navigation, More Efficient with eLoran 25...

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...

In a paper dated the 29th of March 2018, Washington, DC's conservative and influential Heritage Foundation discussed deterrence, the U.S., China, and space. One of the key points of the paper (highlighted on the first page) is: The United States needs to demonstrate...

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: Government authorities around the world have been slow to address the problem of small GPS jammers because the negative impacts - dropped cell phone calls, temporary disruption of tracking and navigation services, slower networks - while...

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.  

Sure, there was a DHS announcement last month, but this is info worth repeating. Help us make sure it gets out as far and wide as possible: Get your GPS systems ready now for the rollover event in 2019! Many folks will think "Oh, gosh, this seems complicated and...

The European Union's STRIKE3 project briefed the PNT Advisory Board last week about their on-going work to detect and identify GNSS disruptions.  Through limited sampling, the project has come up with some disturbing results showing the vulnerability of GNSS signals....

Smart Sky Networks hammered home two points at the PNT Advisory Board last week: UAV/UAS and On Demand Mobility are on the verge of being huge social and economic enablers They can't do it with easily disrupted PNT signals The United States has been a world leader in...

The European Union's STRIKE3 project reported at the US PNT Advisory Board meeting last week that their study of GPS/GNSS jamming in Europe and elsewhere has shown that jammers are evolving to become more sophisticated and prevalent. The results of measurements at...

'Resilient PNT efforts suffer from the tragedy of the commons. Every government department and agency wants it, but each think it's the responsibility of another. it can only be done at the highest levels of government and that's what's happening in the UK' This was...

Blog Editor's Note: 99%+ of GPS users are not in the Department of Defense. We are reminded of a comment at a recent workshop on GPS and critical infrastructure. After a presentation about DoD's extensive Assured PNT program, one participant asked "Where's the APNT...

In March the European Union released its Radionavigation Plan calling for non-space backup systems for GNSS. Late last month the European Commission announced an effort to identify user requirements for such backup systems.  In a memo dated the 26th of April Galileo...

Blog Editor's Note: The associated video (here) compares the actual display with the way it was supposed to have played out. It is clear that the disruptions were localized, but probably came from two or more sources. The center right portion of the display is as...

Blog Editor's Note: An interesting paper and approach from Orolia. The thesis that, while clocks, inertial, and fiber all have their place in a resilient architecture, our economy has gone wireless, is an interesting one. As is the point they make about it being...

On Tuesday the US House of Representatives Subcommittee on Coast Guard and Maritime Transportation held a hearing on Blue Technology. In his written testimony, Mr. Michael Jones, President of the Maritime Alliance, discussed GPS jamming and spoofing as a maritime...

The recently released House mark for the 2019 National Defense Authorization Act (NDAA) includes an additional $5M to add to the $10M appropriated in the 2018 budget, for a GPS backup technology demonstration.  The draft bill says: GPS Backup Demonstration The...

Blog Editor's Note: While it might be exceptionally difficult to hack GPS by invading its operating system (probably not Windows 95 as suggested in the second article below), it is incredibly easy to hack GPS civilian signals by spoofing, and to launch a successful...

Blog Editor's Note: Jamming satnav services, like GPS, is illegal in many countries. Yet few nations have active programs to detect and arrest those violating such laws. In the United States, for example, the Federal Communications Commission (FCC) has the authority...

Blog Editor's Note: This, of course, could be said of any unmanned system, and to a lesser extent for all transportation, manned and unmanned. The US government is doing a technology demonstration of a complementary and backup system for GPS this year. Once...

Technologists from the National Institutes of Standards (NIST) report that all the operators of electrical grids they have contacted have reported some problems using GNSS timing. About 20% report that this has caused problems with operations, mostly offline analysis...

Over the last 12 months Russia has been increasingly active disrupting GPS signals and undermining confidence in "America's gift to the world." These activities seem to be serving several Russian national objectives: Frustrate western military and peacekeeping...

Blog Editor's Note: The release of this study has been much anticipated. We don't know why it is only being released now, even though it is dated December 2017. It has already been referenced by the NPEF's published Gap Analysis report.  EXECUTIVE SUMMARY The goal of...