Next: c2tcio, Previous: c2t00b, Up: Internal Routines [Contents][Index]

`c2t06a(`

`jdtt`, `jdut`, `xp`, `yp`)

[SOFA] Returns the celestial-to-terrestrial matrix, given TT Julian
Date

, UT1 Julian Date `jdtt`

, and polar
coordinates `jdut`

, `xp`

, using the IAU 2006
precession model and IAU 2000A nutation model.
`yp`

and `jdtt`

should express the same
instants of time: the first one in the TT timescale, and the second
one in the UT1 timescale. `jdut`

are the coordinates
(in radians) of the Celestial Intermediate Pole with respect to the
International Terrestrial Reference System measured along the
meridians to 0 and 90 degrees west, respectively, for those same
instants. All four arguments must have the same dimensions.
`x`, `y`

The result gets the same dimensions as all of the parameters, with two dimensions equal to 3 prefixed.

See also: c2t00a, c2t00b, Astronomical Coordinate Calculations