Physics
Scientific paper
May 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995georl..22.1133b&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 22, no. 9, p. 1133-1136
Physics
25
Energetic Particles, Geomagnetism, Magnetic Storms, Particle Trajectories, Solar Protons, Anisotropy, Cosmos Satellites, Goes 7, Mathematical Models, Noaa 10 Satellite, Ring Currents
Scientific paper
Orbit-averaged geomagnetic transmission measurements during the large solar energetic particle events of October 1989 are presented using proton data from the NOAA-10 and GOES-7 satellies. The measurements are compared to geomagnetic transmission calculations determined by tracing particle trajectories through the combination of the International Geomagnetic Reference Field (IGRF) model and the 1989 Tsyganenko magnetospheric magnetic field model. The effective 'ring current' parameter in the 1989 Tsyganenko model based on the Dst data. Results are compared to calculations employing only the IGRF and to a parameterization of geomagnetically quiet-time cutoff rigidities derived from Cosmos/intercosmos observations. The 3-hour orbit-averaged results have approximately 15% accuracy during the October 1989 events.
Adams James H. Jr.
Boberg Paul. R.
Flueckiger Erwin O.
Kobel E.
Tylka Allan J.
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