Todd E. Humphreys

Photo of Humphreys, Todd E.

Assistant Professor

Research Area:
Orbital Mechanics

Email: todd.humphreys@mail.utexas.edu
Phone: (512) 471-4489
Office: WRW 411C

Ph.D., Cornell University

Research Interests:

  • Estimation and filtering

  • Satellite navigation technology and security

  • Software-defined radio

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. Dr. Humphreys joined the faculty of the Cockrell School of Engineering in Fall 2009.

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