  Numerical simulations based on the Lambda-CDM model of cosmology predict a
large number of as yet unobserved Galactic dark matter satellites. We report
the results of a Large Area Telescope (LAT) search for these satellites via the
gamma-ray emission expected from the annihilation of weakly interacting massive
particle (WIMP) dark matter. Some dark matter satellites are expected to have
hard gamma-ray spectra, finite angular extents, and a lack of counterparts at
other wavelengths. We sought to identify LAT sources with these
characteristics, focusing on gamma-ray spectra consistent with WIMP
annihilation through the $b \bar b$ channel. We found no viable dark matter
satellite candidates using one year of data, and we present a framework for
interpreting this result in the context of numerical simulations to constrain
the velocity-averaged annihilation cross section for a conventional 100 GeV
WIMP annihilating through the $b \bar b$ channel.
