[SOFA] Returns the celestial-to-intermediate matrix for TT Julian
jdtt according to the IAU 2000B precession-nutation
jdtt may be a numerical scalar or array.
The return value has dimensions 3, 3 prefixed to the dimensions from
c2i00a returns slightly more accurate results but takes more
time to calculate them.
See also: c2i00a, c2i06a, c2ibpn, Astronomical Coordinate Calculations