slaPrenut -

SYNOPSYS

PARAMETERS

double epoch

double date

double ( *rmatpn

DESCRIPTION

  Form the matrix of precession and nutation (IAU 1976 / FK5)

  (double precision)

Given

     epoch   double         Julian epoch for mean coordinates
     date    double         Modified Julian Date (JD-2400000.5)
                            for true coordinates

Returned

     rmatpn  double[3][3]   combined precession/nutation matrix

Called

 slaPrec, slaEpj, slaNut, slaDmxm

Notes

  1)  The epoch and date are TDB (loosely ET).

  2)  The matrix is in the sense   v(true)  =  rmatpn * v(mean) .

  P.T.Wallace   Starlink   15 July 1993

SEE ALSO

• slalib.3