Todd E.
Humphreys
PhD.
Associate Professor
Aerospace Engineering & Engineering Mechanics
Dr. Humphreys specializes in the application of optimal estimation techniques to problems in satellite navigation, orbital and attitude dynamics, and signal processing. He directs the Radionavigation Laboratory at UT-Austin, 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.