Blog Editor's Note: We have heard conflicting reports about GPS effectiveness at high latitudes. Also that Russia's GLONASS satnav system is specifically designed to provide good coverage to the Arctic. This makes sense as the Arctic is a big area of investment and...

Blog Editor's Note: Two different opinions recently published by Defense One. It is interesting, though, that their disagreement is based on the costs of satellites and anti-satellite weapons. Both agree that over-reliance on space systems is a really bad idea. From...

Blog Editor's Note: I have an analog clock in my office that I never have to adjust because it is synced with WWV. While neither WWV nor WWVH are sufficiently precise for most commercial applications, it would be interesting to know which users will be impacted if...

Blog Editor's Note: This new risk center was mentioned at the recent DHS Cyber Security Summit. Mr. Bob Kolasky, it's new leader, has told us that GPS and PNT issues will be one of the center's focus areas. "It is very much top-of-mind" Kolasky told us before the...

Blog Editor's Note: The National Space-based Positioning, Navigation, and Timing (PNT) Advisory Board is a Federal Advisory Committee Act body established by Presidential directive and administered by NASA. It reports to the US government's PNT Executive Committee...

Blog Editor's Note: It seems that every forum lately that talks about positioning, or navigation, or timing, is focusing on resilience.  GOOD! The tools for all kinds of disruptions are becoming more widely available, cheaper and easier to use. We need to be prepared,...

Blog Editor's Note: GPS is really great and the the US government has actively encouraged its use for decades. It has has brought untold increases in efficiency, brand new services, and new businesses. At the same time it under girds every network and most of our...

The Senate delivered the 2019 National Defense Authorization Act (NDAA) to the President last week, without provisions proposed by the House supporting efforts to provide a complementary and backup service for GPS. Hill insiders tell us that this was due to...

Blog Editor's Note:  This is a reprint of a piece we published today with "Inside GNSS." 3 August 2018 One of the big challenges to Protecting, Toughening, and Augmenting GPS is the huge number of GPS/GNSS receivers already in use — often referred to as “the installed...

Blog Editor's Note: Tracking and peoples' reaction to it is an entire field of study on its own. While reading "Pinpoint - How GPS is Changing Technology, Culture, and Our Minds" we were surprised to come upon an entire chapter devoted to behavioral science. On...

Blog Editor's Note; If you don't want to give up your car's electrical outlet to power your GPS jammer, this new device uses the On Board Diagnostic (OBD) port. We like that the vendor is very careful to explain the limitations of the equipment. It only impacts L1,and...

Blog Editor's Note: There are those in the FAA and the aviation industry who, when asked about the importance of GPS to aviation claim that they have backups and can do without.* Never mind that the entire system would slow down, become less efficient and more...

Blog Editor's Note: Whenever we have spoken to folks from the electrical grid sector, their position on GPS vulnerability has been "we can operate the grid without GPS, we just can't manage it." This has always seemed a strange way to approach the issue to us.  Who...

Blog Editor's Note: We love interesting articles that talk about new PNT technologies.  But when they talk about "replacing GPS," well, that's a bit of hype too far, in our opinion. Especially since, while all the systems described seem interesting, all fall short...

Blog Editor's Note: More recent incidents and concerns tend to make many of us forget about the lessons of the January 2016 GPS timing glitch. I wonder how much we learned and how much different things would be today if it happened again. This article first...

“PNT vulnerability very much top of mind” says Assistant Secretary We were misinformed that the DHS Cyber Summit was not going to include discussion of PNT issues. DHS’ Acting Assistant Secretary for Infrastructure Protection, Bob Kolasky told us that PNT issues will...

The National PNT Advisory Board will meet by teleconference/WebEx at noon EST on the 6th of August. Agenda items are: Finalize and Approve the National Space-Based PNT Advisory Board Topics Paper Finalize and Approve the National Space-Based PNT Advisory Board...

Blog Editor's Note; It is good to see DHS concerned about this issue. We wonder why, though, they are focusing only on GPS sensors as GPS/GNSS signals are inherently NOT resilient ...     2018 Resilient GPS Equipment Demonstration for sUAS  ...

Blog Editor's Note: The RNT Foundation has filed several items with the FCC concerning adjacent band interference with GPS/GNSS. Subsequent to Ligado's most recent modification to their application, we joined a number of other organizations expressing continuing...

Blog Editor's Note: A recent "Inside GNSS" article discussed broad efforts being made across organizations and companies to address increasing concerns about GPS vulnerability. One of the events cited was a NIST workshop the RNT Foundation helped develop. A MITRE...

Blog Editor's Note: First they said "It's really hard to spoof GPS." Then hackers made it easy, and reduced the cost to nearly nothing. Next they said, "Use multiple GNSS constellations because it's almost impossible to spoof them all at once." Then hackers showed how...

Blog Editor's Note - We  are really, really good with guarding GPS.  But the real threats to are to the signals, not the satellites, and come from the ground not space. Perhaps we should worry about that first...   Bloomberg Politics Trump’s Space Force Will...

Blog Editor's Note: We aren't suggesting you pay $5795.00 for this market analysis report. But it is interesting to see that the jammer market is big enough to warrant such an effort. Also that all the companies cited as feeding the market are major players,...

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...