Now showing items 1-4 of 4

    • Composition and spectral properties of the 1 AU quiet-time superthermal ion population during solar cycle 23 

      Dwyer, Joseph R.; Rassoul, Hamid K.; Mason, G. M.; Mazur, J. E.; Desai, M. I.; Dayeh, M. A. (2009-03-10)
      We have surveyed the spectral and compositional properties of suprathermal heavy ions during quiet times from 1995 January 1 to 2007 December 31 using Wind/Energetic Particles: Anisotropy, Composition, and Transport/Supr ...
    • First images of thunder: Acoustic imaging of triggered lightning 

      Lucia, R.; Rassoul, Hamid; Dayeh, M. A.; Evans, N. D.; Fuselier, Stephen Anthony; Trevino, J.; Ramaekers, J.; Dwyer, Joseph R.; Kotovsky, D. A.; Jordan, Douglas M. (2015-07-16)
      An acoustic camera comprising a linear microphone array is used to image the thunder signature of triggered lightning. Measurements were taken at the International Center for Lightning Research and Testing in Camp Blanding, ...
    • A new phenomenon in impulsive-flare-associated energetic particles 

      Chollet, Eileen E.; Giacalone, Joe; Mazur, Joseph E.; Dayeh, M. A. (2007-11-01)
      We present ACE/ULEIS and Wind/STEP observations of a new and unusual feature of energetic ions between 0.02 and 3 MeV nucleon ˉ¹ associated with impulsive solar flares. In addition to the usual velocity dispersion associated ...
    • X-ray bursts associated with leader steps in cloud-to-ground lightning 

      Dwyer, Joseph R.; Rassoul, Hamid K.; Dayeh, M. A.; Caraway, Lee; Chrest, A.; Wright, Brian F.; Kozak, E.; Jerauld, J.; Uman, Martin A.; Rakov, V. (2005-01-04)
      X-ray and electric field measurements were made during five nearby negative natural lightning strikes in north central Florida during the summer of 2004. The observed X-ray emission typically was detected ∼1 ms before the ...