[SOFA] Returns the celestial-to-intermediate matrix for TT Julian
jdtt according to the IAU 2006 precession model and
the IAU 2000A nutation model.
jdtt may be a numerical
scalar or array.
The return value has dimensions 3, 3 prefixed to the dimensions from
See also: c2i00a, c2i00b, c2ibpn, Astronomical Coordinate Calculations