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epv00, jdtdb, pvh, pvb
[SOFA] Returns the Earth position and velocity for the specified TDB
Julian Dates jdtdb (for most applications, TT can also be
used instead of TDB), in the heliocentric (pvh) and
barycentric (pvb) coordinate systems, with respect to the
Barycentric Celestial Reference System. pvh(0,*) =
heliocentric position (AU), pvh(1,*) = heliocentric
velocity (AU/d), pvb(0,*) = barycentric position (AU),
pvb(1,*) = barycentric velocity (AU/d). pvh
and pvb have the same dimensions as jdtdb
but with an extra dimension equal to 2 prefixed.
See also: Astronomical Coordinate Calculations