The Solar Mass-Ejection Imager (SMEI) Mission

Details The Solar Mass-Ejection Imager (SMEI) Mission The Solar Mass-Ejection Imager (SMEI) Mission

Nov 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004soph..225..177j&link_type=abstract

Solar Physics, Volume 225, Issue 1, pp.177-207

Physics

63

Scientific paper

We have launched into near-Earth orbit a solar mass-ejection imager (SMEI) that is capable of measuring sunlight Thomson-scattered from heliospheric electrons from elongations to as close as 18∘ to greater than 90∘ from the Sun. SMEI is designed to observe time-varying heliospheric brightness of objects such as coronal mass ejections, co-rotating structures and shock waves. The instrument evolved from the heliospheric imaging capability demonstrated by the zodiacal light photometers of the Helios spacecraft. A near-Earth imager can provide up to three days warning of the arrival of a mass ejection from the Sun. In combination with other imaging instruments in deep space, or alone by making some simple assumptions about the outward flow of the solar wind, SMEI can provide a three-dimensional reconstruction of the surrounding heliospheric density structures.

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