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Contributing Writers
Todd Humphreys![]() Todd E. Humphreys is an assistant professor in the Department of Aerospace Engineering and Engineering Mechanics at the University of Texas at Austin. He directs the university's Radionavigation Laboratory, where software-defined GPS receivers are developed as a platform for GPS technology innovation and study of the ionosphere and neutral atmosphere. His recent focus has been on defending against intentional GPS spoofing and jamming. In 2008 he co-founded Coherent Navigation, a startup that hardens GPS by, among other things, exploiting telephony signals from the Iridium satellite constellation. He received a B.S. and M.S. in electrical and computer engineering from Utah State University and a Ph.D. in aerospace engineering from Cornell University. His research interests are in estimation and filtering, GNSS technology, GNSS-based study of the ionosphere and neutral atmosphere, and GNSS security and integrity. Articles
March/April 2012
The GPS Dot and its DiscontentsJune 2010
The GPS AssimilatorJuly/August 2009
GNSS and Ionospheric ScintillationMarch/April 2009
A Multi-Antenna Defense: Receiver-Autonomous GPS Spoofing Detection |