Spotlight

Austin, TX — Outside of the four papers contributed solely by RNL to ION GNSS, RNL members were co-authors on four other papers:

• Ryan Mitch’s paper on Signal Characteristics of Civil GPS Jammers (Cornell)
• Brady O’Hanlon’s paper on CASES: A Smart, Compact GPS Software Receiver for Space Weather Monitoring (Cornell)
• Mark Psiaki’s paper on Civilian GPS Spoofing Detection based on Dual-Receiver Correlation of Military Signals (Cornell)
• Geoff Crowley’s paper on CASES: A Novel Low-Cost Ground-based Dual-Frequency GPS Software Receiver (ASTRA)

Whether it’s investigating ways to preserve the security of GPS signals or developing new types of receivers, the field of radionavigation is ripe with possibility—and Dr. Todd Humphreys does not hesitate for a moment in defining how his research team fits into the mix. “What’s the next big thing in GPS?” he asks. “That’s what we’re trying to pursue. In fact, that’s what we’re trying to create.”

Continue reading the Aerospace Engineering Feature.

Austin, TX — Members of the Radionavigation Laboratory briefed visitors from the DHS, USCG, NSWC, JNWC, and USSTRATCOM on several aspects of GPS security and integrity including: effects of GPS spoofing on power grid monitoring, anti-spoofing techniques for civil GPS, and GPS interference detection and localization techniques.

Meeting Agenda and Participants 

• Introductory Remarks, Todd Humphreys
• Thoughts on GPS Security and Integrity, Todd Humphreys
• Characterization of Receiver Response to a Spoofing Attack with video, Daniel Shepard
• Navigation Message Authentication for Civil GPS Anti-Spoofing, Kyle Wesson
• GPS Interference Detection and Localization, Jahshan Bhatti

“Signals from GPS satellites now help you to call your mother, power your home, and even land your plane—but a cheap plastic box can jam it all.”

Continue reading the NewScientist article, which features a discussion with Dr. Humphreys on GPS spoofing in the “Faking It” section. 

Austin, TX — Members of the Radionavigation Laboratory launched a memorial page for Dr. Paul M. Kintner, Jr. along with Paul’s receiver, a continuously operating receiver in the spirit of an eternal flame. We started Paul’s receiver running this month. We intend to keep it going as long as we can.

More tributes to Paul are welcome; please submit them to Todd Humphreys.

Austin, TX — Members of the Radionavigation Laboratory went on a full day excursion to capture simultaneous GPS and Cellular CDMA spectrum via the lab’s powerful National Instruments radio frequency signal analyzers. Over 1.5 TB of spectral data were recorded at 37.5 MSps with the goal of characterizing dynamic GPS multipath, exploring tightly-coupled opportunistic navigation, and evaluating GPS jamming mitigation techniques. The data log files are available here for download. Interested parties can request this data for their own post processing needs.For a visual representation of the multipath encounterd, the data can be plotted in Google maps/earth. To see the visuals:1) go to the test listing.2) copy the “http:.// … .kml?rand=99” URL of the test to map3) open Google maps and paste the URL in the search bar