Overview

Hysell studies the Earth's upper atmosphere and ionosphere using high power radars such as the Arecibo and Jicamarca incoherent scatter radars. He also develop and use small coherent scatter radars like the 30 MHz imaging radar interferometer, recently deployed on St. Croix in the Virgin Islands in support of experiments at Arecibo. One goal of his research is an understanding of the physics of plasma irregularities in the low-, mid-, and high-latitude ionosphere through observation, analysis, and numerical simulation. Another is the development of new techniques for processing radar data such as are involved in in-beam radar imaging. Finally, he seeks to understand the composition, energetics, and dynamics of the ionosphere and the systems coupled to it.

Research Focus

Hazard avoidance and mitigation; hazard communication and navigation system disruptions associated with space weather, Forecasting ionospheric irregularities and instabilities.

Instruction Focus

Radar Remote Sensing, Upper Atmospheric Space Physics

Additional Links

• David Hysell
• The Upper Atmosphere

Honors, Awards and Appointments

• Sonny Yau Excellence in Teaching Award - 2006
• CEDAR Prize Lecture Award - 1999
• URSI Young Scientist Award - 1996
• Recipient, Radio Science Citation for Excellence in Refereeing - 1996

Professional Activities

• Colloquium at Arecibo Observatory: Parallel wavenumber effects on midlatitude ionospheric waves and instabilities. - 2008
• AGU Joint Assembly, Acpulco, Mexico: New topside measurements at Jicamarca. - 2007
• AGU Joint Assembly, Acapulco, Mexico (invited): Midlatitude plasma irregularities with finite parallel wavenumbers. - 2007
• IUGG XXIV, Perugia, July 2007: New insights into ionospheric plasma instabilities at low, middle, and high latitudes. - 2007
• IUGG XXIV, Perugia, July 2007 (invited): Radar observations of equatorial eletrojet irregularities at Jicamarca. - 2007
• URSI Joint National Radio Science Meeting, Ottawa, July 2007: Improved coherent scatter spectral estimation using alternating codes. - 2007

Selected Publications

• Hysell, D. L., and J. L. Chau, Improved spectral estimation of equatorial spread F through aperiodic pulsing and Bayesian inversion, Radio Sci., 2008, accepted for publication.
• Hysell, D. L. et al., Imaging radar observations of Farley Buneman waves during the JOULE II experiment, Annales Geophysicae, 2008, submitted for publication.
• Hysell, D. L, F. S. Rodrigues, J. L. Chau, and J. D. Huba, Full profile incoherent scatter analysis at Jicamarca, Annales Geophysicae, 26(1), 59.
• Hysell, D. L, 30 MHz radar observations of artificial E region field-aligned plasma irregularities, Annales Geophysicae, 26(1), 117.
• Hysell, D. L., et al., Combined radar observations of equatorial electrojet irregularities at Jicamarca, Annales Geophysicae, 25, 457.
• Hysell, D. L., Inverting ionospheric radio occultation measurements using maximum entropy, Radio Sci., 42, RS4022, doi:10.1029/2007RS003635.
• Larsen M. F., D. L. Hysell, Q. H. Zhou, S. M. Smith, J. Friedman, and R. L. Bishop, Imaging coherent scatter radar, incoherent scatter radar, and optical observations of quasiperiodic structures associated with sporadic E layers, J. Geophys. Res., 112, A06321, doi:10.1029/2006JA012051.

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