Geomagnetic transmission disturbances and heavy-ion fluences observed in low Earth orbit during the solar energetic particle events of October 1989

P R Boberg; A J Tylka; J H Adams Jr; L P Beahm; E O Fluckiger; T Kleis; E Kobel

doi:10.1016/0273-1177(95)00522-g

Geomagnetic transmission disturbances and heavy-ion fluences observed in low Earth orbit during the solar energetic particle events of October 1989

Adv Space Res. 1996;17(2):121-5. doi: 10.1016/0273-1177(95)00522-g.

Authors

P R Boberg¹, A J Tylka, J H Adams Jr, L P Beahm, E O Fluckiger, T Kleis, E Kobel

Collaborator

J r Adams JH²

Affiliations

¹ E.O. Hulbert Center for Space Research, Naval Research Laboratory, Washington, DC 20375-5352, USA.
² Naval Res Lab, Washington, DC

PMID: 11540358
DOI: 10.1016/0273-1177(95)00522-g

Abstract

The large solar energetic particle (SEP) events and simultaneous large geomagnetic disturbances observed during October 1989 posed a significant, rapidly evolving space radiation hazard. Using data from the GOES-7, NOAA-10, IMP-8 and LDEF satellites, we determined the geomagnetic transmission, heavy ion fluences, mean Fe ionic charge state, and effective radiation hazard observed in low Earth orbit (LEO) for these SEPs. We modeled the geomagnetic transmission by tracing particles through the combination of the internal International Geomagnetic Reference Field (IGRF) and the Tsyganenko (1989) magnetospheric field models, extending the modeling to large geomagnetic disturbances. We used our results to assess the radiation hazard such very large SEP events would pose in the anticipated 52 degrees inclination space station orbit.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Cosmic Radiation*
Earth, Planet
Iron
Magnetics*
Radiation Dosage
Radiation Monitoring / methods*
Radiometry
Risk
Solar Activity*
Space Flight*
Spacecraft

Substances

Iron