Share Email Print
cover

Proceedings Paper

Space performance of the multistage labyrinthine SMEI baffle
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The Solar Mass Ejection Imager (SMEI) was launched on 6 January 2003, and shortly thereafter raised to a nearly circular orbit at 840 km. Three SMEI CCD cameras on the zenith-nadir oriented CORIOLIS spacecraft cover most of the sky beyond about 20°. from the Sun, each 102-minute orbit. Data from this instrument provide precision visible-light photometric sky maps. Once starlight and other constant or slowly varying backgrounds are subtracted, the residue is mostly sunlight that has been Thomson-scattered from heliospheric electrons. These maps enable 3-dimensional tomographic reconstruction of heliospheric density and velocity. This analysis requires 0.1% photometry and background-light reduction below one S10 (the brightness equivalent of a 10th magnitude star per square degree). Thus 10-15 of surface-brightness reduction is required relative to the solar disk. The SMEI labyrinthine baffle provides roughly 10-10 of this reduction; the subsequent optics system provides the remainder. We analyze data obtained over two years in space, and evaluate the full system's stray-light rejection performance.

Paper Details

Date Published: 24 August 2005
PDF: 10 pages
Proc. SPIE 5901, Solar Physics and Space Weather Instrumentation, 590118 (24 August 2005); doi: 10.1117/12.615526
Show Author Affiliations
Andrew Buffington, Univ. of California/San Diego (United States)
Bernard V. Jackson, Univ. of California/San Diego (United States)
P. Paul Hick, Univ. of California/San Diego (United States)


Published in SPIE Proceedings Vol. 5901:
Solar Physics and Space Weather Instrumentation
Silvano Fineschi; Rodney A. Viereck, Editor(s)

© SPIE. Terms of Use
Back to Top