PlanetPositionEMBarycenter:

Path: SC/Ephem

% The position vectors, gravitational parameters and velocity for the planets.
 The frame is centered on the Earth-Moon Barycenter and the plane is
 eccliptic, i.e. xy-plane is the mean earth's orbital plane.

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   Form:
   [r, mu, v] = PlanetPositionEMBarycenter( action, d )
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   ------
   Inputs
   ------
   action    (1,:)       'initialize' or 'update'
   d         (1,n)       Julian date (days) for update or planet ids (1-9) for
                         initialize

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   Outputs
   -------
   r         (3,n)       Planetary position vectors
   v         (3,n)       Velocity vectors
   mu        (1,n)       Corresponding gravitational parameters

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Children:

SC: Ephem/PlanetPosJPL

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