High-resolution energetic particle measurements at 6.6 R sub E. II - High-energy proton drift echoes. III - Low-energy electron anisotropies and short-term substorm predictions

Details High-resolution energetic particle measurements at 6.6 R sub E. II - High-energy proton drift echoes. III - Low-energy electron anisotropies and short-term substorm predictions High-resolution energetic particle measurements at 6.6 R sub E. II - High-energy proton drift echoes. III - Low-energy electron anisotropies and short-term substorm predictions

Oct 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.4857b&link_type=abstract

Journal of Geophysical Research, vol. 83, Oct. 1, 1978, p. 4857-4868. Research sponsored by the U.S. Department of Energy and D

Computer Science

Sound

14

Earth Magnetosphere, Echo Sounding, Energetic Particles, Magnetic Storms, Proton Energy, Satellite Observation, Anisotropy, Electron Flux Density, High Resolution, Particle Intensity, Proton Precipitation, Synchronous Satellites

Scientific paper

The paper reports new observations of proton drift echoes detected by a charged particle analyzer aboard satellites at synchronous altitude. It is shown that the lifetimes of measured 0.4-1.0-MeV protons are long enough and the peak rates of these particles at 6.6 earth radii are sometimes high enough to allow observation of many successive drift echoes. Moreover, virtually all of these well-defined 'high-energy' proton bunches appear to be caused by magnetospheric storms rather than sudden commencements. High-resolution measurements of low-energy (30-300 keV) electrons were also performed. A remarkably regular pattern of pitch-angle variations of these low-energy electrons before and during nearly every substorm observed in the midnight sector was found.

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