SEE relative probability maps for space operations

Abstract

Normalized flux and dose data for protons with energies >50 MeV are used to produce contour maps of relative probabilities of experiencing Single Event Effects (SEEs) in the Earth's inner radiation belt. The data were taken on the APEX and CRRES satellites. To make the maps, the data are averaged in 3/spl deg/ by 3/spl deg/ bins in geographic latitude and longitude, and in 50 km steps in altitude. All geographic longitudes, and latitudes between /spl les/70/spl deg/ are covered. The altitude range extends from 350 km to 14,000 km. This geographic range includes the complete region of inner belt >50 MeV protons, except in the area of the South Atlantic Anomaly below 350 km. The maps easily locate regions of high risk for SEEs and are designed primarily for use in space mission planning and operations. The data base includes the added proton peak following the March 1991 magnetic storm, but does not include SEE probabilities in the polar cap regions associated with high energy solar particle events.