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A picture is currently being taken of the entire sky every 102 minutes
by the SMEI instrument which is mounted on the Coriolis satellite. So
far, some 2 years of such data have been obtained. As the instrument
is designed to look for large-scale surface features (Coronal Mass
Ejections from the Sun), its use for stellar photometry is
complex. This talk will present the accuracies so far achieved, some
results of an analysis of the Cepheid variable Polaris, its use for
planet transit searches, the planned use of a similar instrument on
the upcoming STEREO satellite, and the prospects for future missions.
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