  EarthFinder is a Probe Mission concept selected for study by NASA for input
to the 2020 astronomy decadal survey. This study is currently active and a
final white paper report is due to NASA at the end of calendar 2018. We are
tasked with evaluating the scientific rationale for obtaining precise radial
velocity (PRV) measurements in space, which is a two-part inquiry: What can be
gained from going to space? What can't be done form the ground? These two
questions flow down to these specific tasks for our study - Identify the
velocity limit, if any, introduced from micro- and macro-telluric absorption in
the Earth's atmosphere; Evaluate the unique advantages that a space-based
platform provides to emable the identification and mitigation of stellar
acitivity for multi-planet signal recovery.
