Description:
Returns the barycentric and heliocentric velocity and position of the Earth at a
given epoch, given with respect to a specified equinox. For information about accuracy, see
the function eraEpv00.
Invocation
void palEvp( double date, double deqx, double
dvb[3], double dpb[3], double dvh[3], double dph[3] )
Arguments
date = double
(Given)
TDB (loosely ET) as a Modified Julian Date (JD-2400000.5)
deqx = double (Given)
Julian epoch (e.g. 2000.0) of mean equator and equinox of the vectors returned. If deqx
<= 0.0,
all vectors are referred to the mean equator and equinox (FK5) of epoch date.
dvb = double[3]
(Returned)
Barycentric velocity (AU/s, AU)
dpb = double[3] (Returned)
Barycentric position
(AU/s, AU)
dvh = double[3] (Returned)
heliocentric velocity (AU/s, AU)
dph = double[3]
(Returned)
Heliocentric position (AU/s, AU)
Copyright © 2012 Science and Technology Facilities Council.
Copyright © 2014 Cornell University.
Copyright © 2015 Tim Jenness