Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh41a0304s&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SH41A-0304
Physics
2104 Cosmic Rays, 6225 Mars, 7513 Coronal Mass Ejections (2101), 7514 Energetic Particles (2114), 7519 Flares
Scientific paper
During 2002 and 2003, MARIE (Martian Radiation Environment Experiment) instrument onboard the 2001 Mars Odyssey spacecraft provided some unique data from the Martian orbit. The orbit alignment of Mars-Sun-Earth provided an opportunity between 180 degrees (August 2002) and 0 degrees (October 2003). During this time, the MARIE data included the background GCR (Galactic Cosmic Rays) and several SPE (Solar Particle Events) enhanced radiation dose-rate measurements at Mars. Nearly 40 times increase in the quiet-time GCR dose-rate was noted from about 25 mrad/day to nearly 1000 mrad/day at Mars. Understanding the active regions on the Sun that are likely to result into SPE on the far side will also be of concern for future deep space explorations beyond LEO. We present our approach in depicting SPE with 3D visualization of solar disks facing Mars and Earth. We present the assessment of SPE activity between 2004 and 2006 towards Mars along with an estimated dose-rate during an SPE at Mars along with heliosphere distribution.
Erickson Gary M.
Saganti Premkumar B.
Towns E. L.
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