Description:
Form the matrix of bias-precession-nutation (IAU 2006/2000A). The epoch and date
are TT (but TDB is usually close enough). The matrix is in the sense v(true) = rmatpn
∗
v(mean).
Invocation
void palPrenut( double epoch, double date, double rmatpn[3][3] )
Arguments
epoch = double (Returned)
Julian epoch for mean coordinates.
date = double
(Returned)
Modified Julian Date (JD-2400000.5) for true coordinates.
rmatpn = double[3][3]
(Returned)
combined NPB matrix
Copyright © 2012 Science and Technology Facilities Council.
Copyright © 2014 Cornell University.
Copyright © 2015 Tim Jenness