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`c2ixy(`

`jdtt`, `x`, `y`)

[SOFA] Returns the celestial-to-intermediate-frame-of-date matrix for
TT Julian Dates

and Celestial Intermediate Pole
coordinates `jdtt`

and `x`

(components of the unit
vector in the Geocentric Celestial Reference System), for IAU 2000
models. `y`

may be a numerical scalar or array. The
dimensions of `jdtt`

must be equal to those of
`rbpn`

but with two dimensions equal to 3 prefixed. The
returned array has the same dimensions as `jdtt`

.
`rbpn`

See also: c2ixys, Astronomical Coordinate Calculations