palPrenut palPrenut - Form the matrix of bias-precession-nutation (IAU 2006/2000A)

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