palEcmat
palEcmat
- Form the equatorial to ecliptic rotation matrix - IAU 2006
precession model
- Description:
- The equatorial to ecliptic rotation matrix is found and returned.
The matrix is in the sense V(ecl) = RMAT
V(equ); the
equator, equinox and ecliptic are mean of date.
- Invocation:
- palEcmat( double date, double rmat[3][3] )
- Arguments:
-
-
date = double (Given)
-
TT as Modified Julian Date (JD-2400000.5). The difference
between TT and TDB is of the order of a millisecond or two
(i.e. about 0.02 arc-seconds).
-
rmat = double[3][3] (Returned)
-
Rotation matrix