Marine stratocumulus clouds play an important role in the radiative balance of the Earth, but large uncertainties remain in modeling their properties, largely due to gaps in our understanding of cloud-aerosol interaction processes. The Eastern-Pacific Emitted Aerosol Cloud Experiment (E-PEACE) uses satellite and in situ ship- and airplane-based measurements of anthropogenic aerosol in stratocumulus off the coast of Monterey, Calif., to shed light on cloud-property modification by aerosol. One novel aspect of the experiment is the controlled release of aerosol particles. These order 100 nm-diameter particles are produced on board a ship at a rate of 10^15 s^-1 and greater along pre-selected ship tracks to raise aerosol concentration above marine background levels over areas of hundreds of km^2 in area. Production of the aerosol patterns is timed to permit study by instrumented aircraft and the morning and afternoon Earth Observing System (EOS) satellite constellations. We describe the particle release patterns employed in the E-PEACE 2011 campaign and the cloud structures into which the particles were released, and we present results from the study of these tracks and other ship tracks using EOS satellite cloud and aerosol observations.