Navigation

Recent Papers

See All

Recent Theses

See All

Biblio

Export 185 results:
Sort by: Author Title [ Type (Asc)] Year
Filters: Author is Robert A. Helliwell  [Clear All Filters]
Journal Article
Helliwell, RA, Crystal T  L.  1973.  A Feedback Model of Cyclotron Interaction between Whistler-Mode Waves and Energetic Electrons in the Magnetosphere. Journal of Geophysical Research. 78:7357-7371.
Park, CG, Helliwell RA.  1971.  The formation by electric fields of field-aligned irregularities in the magnetosphere. Radio Science. 6:299.
Stiles, G  S, Helliwell RA.  1975.  Frequency-time behavior of artificially stimulated VLF emissions. Journal of Geophysical Research. 80:608-618.
Helliwell, RA, Carpenter DL, Inan US, Katsufrakis J  P.  1986.  Generation of band-limited VLF noise using the Siple transmitter - A model for magnetospheric hiss. Journal of Geophysical Research. 91:4381-4392.
Helliwell, RA.  1965.  Generation of VLF radio noise in the ionosphere by energetic particle streams. Space Research V, North Holland Publ. Co., Amsterdam.
Mlodnosky, R  F, Helliwell RA.  1962.  Graphic Data on the Earth's Main Magnetic Field in Space. Journal of Geophysical Research. 67:2207-2214.
Park, CG, Helliwell RA, Lefeuvre F.  1983.  Ground observations of power line radiation coupled to the ionosphere and magnetosphere. Space Science Reviews. 35:131-137.
Gail, W  B, Inan US, Helliwell RA, Carpenter DL.  1990.  Gyroresonant wave-particle interactions in a dynamic magnetosphere. Journal of Geophysical Research. 95:15103-15112.
Bell, TF, Helliwell RA, Inan US, Lauben DS.  1993.  The heating of suprathermal ions above thunderstorm cells. Geophysical Research Letters. 20:1991-1994.
Helliwell, RA, Martin L  H.  1961.  The International Geophysical Month. Science. 134:1737-1738.
Rorden, L  H, Helliwell RA, Smith R  L.  1963.  An Interpretation of LOFTI-I very-low-frequency observations, AGARDOGRAPH 74. Pergamon Press. :75-81.
Kimura, I, Matsumoto H, Hashimoto K, Mukai T, Helliwell RA, Bell TF, Inan US, Katsufrakis J  P.  1981.  Jikiken /EXOS-B/ observation of Siple transmissions. Advances in Space Research. 1:197-202.
Heyborne, R  L, Smith R  L, Helliwell RA.  1969.  Latitudinal Cutoff of VLF Signals in the Ionosphere. Journal of Geophysical Research. 74:2393.
Voss, H  D, Imhof W  L, Walt M, Mobilia J, Gaines E  E, Reagan J  B, Inan US, Helliwell RA, Carpenter DL, Katsufrakis J  P.  1984.  Lightning-induced electron precipitation. Nature. 312:740-742.
Luette, J  P, Park CG, Helliwell RA.  1977.  Longitudinal variations of very-low-frequency chorus activity in the magnetosphere - Evidence of excitation by electrical power transmission lines. Geophysical Research Letters. 4:275-278.
Dunckel, N, Ficklin B, Rorden L, Helliwell RA.  1970.  Low-frequency noise observed in the distant magnetosphere with OGO 1.. Journal of Geophysical Research. 75:1854-1862.
Helliwell, RA.  1969.  Low-frequency waves in the magnetosphere.. Reviews of Geophysics and Space Physics. 7:281-303.
Bell, TF, Helliwell RA, Hudson M  K.  1991.  Lower hybrid waves excited through linear mode coupling and the heating of ions in the auroral and subauroral magnetosphere. Journal of Geophysical Research. 96:11379.
Burtis, W  J, Helliwell RA.  1975.  Magnetospheric chorus - Amplitude and growth rate. Journal of Geophysical Research. 80:3265-3270.
Burtis, W  J, Helliwell RA.  1976.  Magnetospheric chorus - Occurrence patterns and normalized frequency. Planetary and Space Science. 24:1007-1024.
Park, CG, Helliwell RA.  1978.  Magnetospheric effects of power line radiation. Science. 200:727-730.
Imhof, W  L, Reagan J  B, Voss H  D, Gaines E  E, Datlowe D  W, Mobilia J, Helliwell RA, Inan US, Katsufrakis J  P, Joiner R  G.  1983.  The modulated precipitation of radiation belt electrons by controlled signals from VLF transmitters. Geophysical Research Letters. 10:615-618.
Helliwell, RA, Bell TF.  1960.  A New Mechanism for Accelerating Electrons in the Outer Ionosphere. Journal of Geophysical Research. 65:1839.
Bell, TF, Inan US, Helliwell RA.  1981.  Nonducted coherent VLF waves and associated triggered emissions observed on the ISEE-1 satellite. Journal of Geophysical Research. 86:4649-4670.
Tkalcevic, S, Inan US, Helliwell RA.  1984.  Nonlinear pitch angle scattering and trapping of energetic particles during Landau resonance interactions with whistler mode waves. Journal of Geophysical Research. 89:10813-10826.