Participated in experiments to measure electron bremsstrahlung beneath auroras, electron bremsstrahlung accompanying both natural and triggered VLF events, auroral zone electric fields, plasmapause electric fields, electric fields at high altitude due to thunderstorms and sprites, and the electromagnetic radiation spectrum of lightning and sprites at high altitude, VLF magnetic fields accompanying active experiments in the ionosphere, dc plasma properties in the ionosphere near pulsating aurora, and electric fields near the magnetospheric cusp. Presently involved in the development of the Variable Specific Impulse Magnetoplasma Rocket (VASIMR) at the Advanced Space Propulsion Laboratory, NASA - Johnson Space Center.
