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`c2ibpn(`

`jdtt`, `rbpn`)

[SOFA] Forms the celestial-to-intermediate matrix for TT Julian Dates

, given the bias-precession-nutation matrix
`jd`

for those same dates. `rbpn`

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 c2i00a, c2i00b, c2i06a, Astronomical Coordinate Calculations