Physics
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusmsh41a..06m&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SH41A-06
Physics
7513 Coronal Mass Ejections (2101), 7845 Particle Acceleration, 2114 Energetic Particles (7514), 2164 Solar Wind Plasma, 2194 Instruments And Techniques
Scientific paper
One of the primary goals of NASA's Sentinels mission, the heliospheric element of the integrated LWS program, is to provide observations necessary for understanding the physics of solar/inner heliosphere processes that produce solar energetic particle (SEP) events, so that requirements for eventual predictive capability can be defined. We present the results of a study by the Sentinels Science and Technology Definition Team (STDT) that recommends the following program: (a) four identical Inner Heliosphere Sentinels (IHS) spacecraft that utilize Venus gravity assists to achieve 0.25-0.7 AU orbits, primarily for in situ particles and fields measurements; (b) a Near-Earth Sentinel (NES) with a spectroscopic coronagraph to provide the physical conditions in the SEP acceleration region and a wide field (>~0.3 AU) coronagraph to connect to the IHS measurements; and (3) a Farside Sentinel (FS) with a magnetograph to provide near global photospheric magnetic field measurements for modeling the structure of the inner heliosphere. From their multiple vantage points, distributed in radius and longitude, the four IHS spacecraft will be able to study the injection, acceleration, and transport of SEPs with unprecedented precision, which should resolve issues that have arisen from SEP timing studies at 1 AU. We illustrate how these combined measurements will lead to an understanding of SEP origin and improve our predictive capability for large SEP events.
Lin Robert P.
Mewaldt Richard A.
Szabo Andras
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