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Proceedings Paper

Solar Mass Ejection Imager (SMEI)
Author(s): Stephen L. Keil; Richard C. Altrock; Stephen Kahler; Bernard V. Jackson; Andrew Buffington; Pierre Paul Hick; George Michael Simnett; Christopher James Eyles; David F. Webb; Peter Anderson
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Paper Abstract

The Solar Mass Ejection Imager (SMEI) experiment is designed to detect and measure transient plasma features in the heliosphere, including coronal mass ejections, shock waves, and structures such as streamers which corotate with the Sun. SMEI will provide measurements of the propagation of solar plasma clouds and high-speed streams which can be used to forecast their arrival at Earth from one to three days in advance. The white light photometers on the HELIOS spacecraft demonstrated that visible sunlight scattered from the free electrons of solar ejecta can be sensed in interplanetary space with an electronic camera baffled to remove stray background light. SMEI promises a hundred-fold improvement over the HELIOS data, making possible quantitative studies of mass ejections. SMEI measurements will help predict the rate of energy transfer into the Earth's magnetospheric system. By combining SMEI data with solar, interplanetary and terrestrial data from other space and ground-based instruments, it will be possible to establish quantitative relationships between solar drivers and terrestrial effects. SMEI consists of three cameras, each imaging a 60 degree(s) X 3 degree(s) field of view for a total image size of 180 degree(s) X 3 degree(s). As the satellite orbits the earth, repeated images are used to build up a view of the entire heliosphere.

Paper Details

Date Published: 25 November 1996
PDF: 12 pages
Proc. SPIE 2804, Missions to the Sun, (25 November 1996); doi: 10.1117/12.259702
Show Author Affiliations
Stephen L. Keil, Air Force Phillips Lab. (United States)
Richard C. Altrock, Air Force Phillips Lab. (United States)
Stephen Kahler, Air Force Phillips Lab. (United States)
Bernard V. Jackson, Univ. of California/San Diego (United States)
Andrew Buffington, Univ. of California/San Diego (United States)
Pierre Paul Hick, Univ. of California/San Diego (United States)
George Michael Simnett, Univ. of Birmingham (United Kingdom)
Christopher James Eyles, Univ. of Birmingham (United Kingdom)
David F. Webb, Boston College (United States)
Peter Anderson, Boston Univ. (United States)

Published in SPIE Proceedings Vol. 2804:
Missions to the Sun
David M. Rust, Editor(s)

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