Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsh11a..07b&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SH11A-07
Physics
7513 Coronal Mass Ejections, 7594 Instruments And Techniques
Scientific paper
The Solar Mass Ejection Imager (SMEI) instrument provides white-light photometric maps covering most of the sky each orbit of the Coriolis spacecraft. The SMEI differential photometry specification is 0.1% for each 1 square degree sky bin. A labyrinthine baffle reduces scattered sunlight, but for a portion of the data a background residue must also be subtracted to finally reach this specification. We describe this process, and further discuss how bright stars are used to determine an appropriate conversion from the CCD-camera data units to sky surface brightness. Also, the CCD in the camera viewing closest to the Sun operates significantly warmer than expected, which gives rise to a changing population of "hot pixels". We describe a data-analysis process which significantly alleviates the photometric impact of this.
Buffington Andrew
Hick Pierre P.
Jackson Bernard V.
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