Physics
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....7.4241s&link_type=abstract
Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I
Physics
Scientific paper
We have calculated world grids of vertical cutoff rigidities at 5° intervals for a spacecraft orbiting at 450 km. These cutoff rigidity values were determined from tracing cosmic ray trajectories through the Tsyganenko [15] magnetospheric field model combined with the International Geomagnetic Reference Field (IGRF) for epoch 1995.0 [7]. This paper summarizes the results of these calculations for all magnetic conditions represented by Kp indices ranging from super quiet (Kp=0) to extremely disturb ed (Kp=9+ ). We have improved the time resolution and now have world grids of vertical cutoff rigidities at 450 km for every two hours in universal time. From these results we have assembled a dynamic vertical cutoff rigidity model based on the Tsyganenko magnetospheric model that includes all integer magnetic activity levels specified by the Kp magnetic index.
Flueckiger Erwin O.
Shea Margaret Ann
Smart Don Frederick
Tylka Allan J.
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