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June 2021:  There was tension in the Black Sea near Crimea, Ukraine as Russian authorities claimed to have fired warning shots at the UK Royal Navy destroyer HMS Defender; however, the UK Ministry of Defence denies the event ever happening.  Automatic Identification System (AIS) tracking logs showed that the HMS Defender traversed the Black Sea and sailed within a […]

May 2021: Reports of maritime GNSS spoofing have become all but routine in recent years. Ships navigating the Strait of Hormuz have been reporting suspicious navigation problems which may be the result of Iranian spoofing. Many theorize that Iran uses spoofing to lead unsuspecting vessels into Iranian waters where they may be captured. This article from The Economist mentions Dr. Humphreys’s experiments

May 2021: Ligado, an American communications company, received approval from the FCC in 2020 to build a terrestrial 5G network which will operate in the spectrum adjacent to GPS. Many worry that Ligado’s network will inadvertently jam GPS receivers because the frequencies are near one another and Ligado’s signals will be much stronger. Interestingly, the FCC only

May 2021: German broadcasting station Südwestrundfunk (SWR) featured Dr. Humphreys in their news report on GNSS spoofing. In his interview, Dr. Humphreys explains the leading theory on GNSS spoofing in Syria: that the Russian military has been deploying a “bubble of GPS spoofing” to help protect Vladimir Putin on his visits there. Watch the news broadcast on YouTube here. This report, entitled “Above Us

April 2021: The prevalence of unmanned aerial vehicles has caused a plethora of safety and regulatory problems in recent years, which is why several companies are developing counter-UAV technologies. Some of these use kinetic methods to disable offending drones, but others use microwave radiation to either jam or disable the drones’ onboard electronics.  “A ray gun that can fry a drone’s

March 2021: GPS interference has been a worsening problem for the past decade, particularly for aviation. This article from IEEE spectrum covers current research efforts to detect and monitor GPS interference. Data from ADS-B and terrestrial GPS receivers offer a good start, but Dr. Humphreys explains that these sources are limited by sensor sparsity:  “There are fewer than 3000 GPS reference

January 2021: This recent article from The New York Times summarizes America’s extreme dependence on GPS and the resulting vulnerabilities. They credit Dr. Humphreys’s 2008 paper on GPS spoofing with bringing the weakness to light. When asked about the urgency of finding alternatives to GPS, Dr. Humphreys said “If we don’t get good backups on line, then GPS is

January 2021: FAA pilot reports have revealed that military tests are interfering with airline flights. The military is presumably generating GPS interference to test their latest positioning technology, but the interference is reaching beyond the test sites and jamming passenger aircraft that routinely rely on GPS for navigation and landing. Although pilots are trained for such scenarios, the loss

October 2020: Check out our videos page for an update on the Radionavigation Lab’s research! We’ve been working hard to produce short video summaries of our recent papers. Enjoy! Multi-Antenna Vision-and-Inertial Aided CDGNSS for Micro Aerial Vehicle Pose Estimation Fused LEO GNSS Vehicle Sensorium Demonstration Open-World Virtual Reality Headset Tracking Game-Theoretic Counter-UAV for Real-World Situations All-Weather sub-50-cm

October 2020: This recent article from BBC explores the modern world’s dependence on GPS and some possible position, navigation, and timing alternatives. We depend on GPS for everything from turn-by-turn navigation to banking transactions, but the system has some critical vulnerabilities to jamming and spoofing. “There is a growing recognition of the need to protect, toughen, and augment