Astronomical Applications Department, U.S. Naval Observatory NOVAS 2006 Overview Page 3
(14) New subroutine RADVL has been added to compute radial velocity. It is called
from PLACE. Currently, RADVL has just a simple classical formula for radial velocity
but that will soon be changed to the more complex and relativistically correct formulas
from the Lindegren and Dravins A&A paper cited in the comments. The Lindegren &
Dravins formulas are in accordance with an IAU resolution on the definition of radial
velocity passed in 2000.