  Synchrotron emission is an important process in Galactic dynamics and a
potentially confusing foreground for cosmic microwave background (CMB)
radiation observations. Though the mechanism of synchrotron emission is well
understood, the details for the Galaxy and many external sources are not well
characterized. Quality maps at multiple frequencies are lacking but needed for
a full understanding of the Galactic synchrotron emission, including intensity,
spectrum, and spectral variation. At high frequencies (> 70 GHz) synchrotron
emission is not a severe limitation to precise CMB observations well away from
the Galactic plane.
