Attila Komjathy

Attila Komjathy is a Group Leader and Principal Investigator of the Ionospheric and Atmospheric Remote Sensing (IARS) Group of the Tracking Systems and Applications Section at NASA's Jet Propulsion Laboratory (JPL), the California Institute of Technology, specializing in ionospheric and atmospheric remote sensing techniques.

He received his Ph.D. from the Department of Geodesy and Geomatics Engineering of the University of New Brunswick, Canada where he currently also serves as an adjunct professor. He spent four years as a postdoctoral researcher at the University of Colorado at Boulder. He is recipient of several NASA awards including an Exceptional Space Act Award, Best Paper and JPL Group Achievement Awards. He is a member of the WAAS Integrity Performance Panel (WIPP). He serves as external member of the Public Law Association of the Hungarian Academy of Sciences. He is an Editorial Board member of the AGU’s Radio Science and the Japanese Earth Planets and Space.

  • Post-doc at University of Colorado at Boulder, 1997-2001
  • Ph.D., University of New Brunswick, Canada, 1997
  • Dipl. Eng., University of Miskolc, Hungary, 1989

Research Interests: 

Investigates GPS and other sensors to study the temporal and spatial variation of the global ionosphere including the use of global empirical, physics-based and assimilative ionospheric models. Specializes in developments of ionospheric mitigation and remote sensing techniques for Wide Area Augmentation System (WAAS) and Satellite-Based Augmentation Systems (SBAS). Conducts research in natural hazards detection of earthquakes, tsunamis, volcanic eruptions using ground and space-based GNSS data and infrasound measurements. Leads new activities that expand the group’s focus beyond GNSS-related remote sensing techniques, targeting novel terrestrial and planetary applications including planetary surface and atmospheric coupling. Initiates developments of new remote sensing technologies including reflectometry for e.g., wind vector, ice reflections and altimetry applications using ground and space-based sensors.

Professional Experience: 

Works at JPL since 2001

Selected Awards: 
  • Institute of Navigation Fellow elected for contributions to remote sensing of Earth’s ionosphere using GNSS signals, 2015. <>
  • GPS World 2013 Leadership Award in Services, Sept 2013 <>
  • Group Achievement AwardGroup Leader (recognized by JPL Director and Caltech President) for outstanding development in real-time techniques to detect ionospheric perturbations due to natural hazards using the Global Positioning System, Sept 2013.
  • Mariner Award for new signal process techniques developed for natural hazards detection in the ionosphere, Sept 2013; Elected Member of ION National Council; United States Patents, 2007, 2013, 2015; Cited as “50+ Leaders to Watch” in GPS World, May 2008; NASA Space Act Awards, May 2005, Feb 2006.
  • 1998, Awarded with the 1998 Canadian Governor General Gold Medal for academic excellence in graduate studies <>

Selected Publications: 
  1. Durgonics, T., A. Komjathy, O. Verkhoglyadova, E. B. Shume, H.-H. Benzon, A. J. Mannucci, M. D. Butala, P. Høeg, and R. B. Langley (2017), Multi-instrument observations of a geomagnetic storm and its effects on the Arctic ionosphere: A case study of the 19 February 2014 storm, Radio Sci., 52,
  2. Komjathy, A., Y.-M. Yang, X. Meng, O. Verkhoglyadova, A. J. Mannucci, and R. B. Langley (2016), Review and perspectives: Understanding natural-hazards-generated ionospheric perturbations using GPS measurements and coupled modeling, Radio Sci, 51,
  3. Vergados, P., A. Komjathy, T. F. Runge, M. D. Butala, and A. J. Mannucci (2016), Characterization of the impact of GLONASS observables on receiver bias estimation for ionospheric studies, Radio Sci., 51,
  4. Shume, E. B., A. Komjathy, R. B. Langley, O. Verkhoglyadova, M. D. Butala, and A. J. Mannucci (2015), Intermediate scale plasma irregularities in the polar ionosphere inferred from GPS radio occultation, Geophys. Res. Lett., 42,
  5. Yang, Y.-M., X. Meng A. Komjathy, O. Verkhoglyadova, R.B. Langley, B.T. Tsurutani and A. J. Mannucci (2014). “Tohoku-Oki Earthquake Caused Major Ionospheric Disturbances at 450 km Altitude Over Alaska.” Radio Sci.,
  6. Yang, Y.-M., A. Komjathy, R. B. Langley, P. Vergados, M. D. Butala, and A. J. Mannucci (2014), The 2013 Chelyabinsk meteor ionospheric impact studied using GPS measurements, Radio Sci., 49,
  7. Komjathy, A. (2014), “The Effects of the Ionosphere on the Propagation of Electromagnetic Waves.” Encyclopedia of Remote Sensing, Ed: E.G. Njoku. Springer
  8. Garcia-Fernandez, M., S. D. Desai, M. D. Butala, and A. Komjathy (2013), Evaluation of different approaches to modeling the second-order ionospheric delay on GPS measurements, J. Geophys. Res. Space Physics, 118, 7864–7873,
  9. Komjathy, A., D.A. Galvan, P. Stephens, M.D. Butala, V. Akopian, B.D. Wilson, O. Verkhoglyadova, A.J. Mannucci, and M. Hickey (2012), “Detecting Ionospheric TEC Perturbations Caused by Natural Hazards Using a Global Network of GPS Receivers: the Tohoku Case Study.” Earth, Planets and Space, Special Issue on “The 2011 Tohoku Earthquake” Vol. 64, pp. 1287–1294, 2012,
  10. Galvan, D. A., A. Komjathy, M. P. Hickey, P. Stephens, J. Snively, Y. Tony Song, M. D. Butala, and A. J. Mannucci (2012), Ionospheric signatures of Tohoku-Oki tsunami of March 11, 2011: Model comparisons near the epicenter, Radio Sci, 47, RS4003,
  11. Galvan, D. A., A. Komjathy, M. P. Hickey, and A. J. Mannucci (2011). “The 2009 Samoa and 2010 Chile tsunamis as observed in the ionosphere using GPS total electron content.” J.  Geophys Res. (116). A06,318, 10.1029/2010JA016204.
  12. Komjathy, A., B. Wilson, X. Pi, V. Akopian, M. Dumett, B. Iijima, O. Verkhoglyadova, and A. J. Mannucci (2010). “JPL/USC GAIM: On the Impact of Using COSMIC And Ground-Based GPS Measurements To Estimate Ionospheric Parameters.” J. Geophys. Res. (Editor’s Choice Award).
Attila Komjathy
4800 Oak Grove Dr.
Pasadena, CA 91109
Phone: 818.393.6828
Fax Number: 818.393.5115