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This works presents a program which computes velocities of an Earth-boundobservatory in the reference frame of the barycenter of the solar system. Itfeeds from ephemerides files of the Jet Propulsion Laboratory to extract thevelocity of the geocenter, optionally with corrections from Earth rotation dataof the International Earth Rotation Service, takes a datum (time and geodeticlocation) of the observer as parameters, and processes these data with theprogram library of the working group `Standards of Fundamental Astronomy' ofthe International Astronomical Union.  The prospective application of the computed velocities is to subtract theirprojection onto a pointing direction from observed velocities in a step of datareduction of astronomic radial velocities.

A Java Program Generating Barycentric Observer Velocities from JPL Ephemerides