  The field of exoplanets has rapidly expanded from the exclusivity of
exoplanet detection to include exoplanet characterization. A key step towards
this characterization will be retrieval of planetary albedos and rotation rates
from highly undersampled imaging data. The Deep Space Climate Observatory
(DSCOVR) provides a unique opportunity to test such retrieval methods using
high cadence data of the sunlit surface of the Earth. There are two NASA
instruments on board DSCOVR that can be used to achieve this task: the NASA
instruments Earth Polychromatic Imaging Camera (EPIC) and the National
Institute of Standards and Technology Advanced Radiometer (NISTAR). Here we
briefly describe the properties of these instruments and the exoplanetary
science that can be explored with their data products. These are described
within the context of future NASA direct imaging missions for exoplanets.
