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`pb06, `

`jdtt`, `bzeta`, `bz`, `btheta`

[SOFA] Returns three Euler angles

(1st rotation,
radians clockwise around z), `bzeta`

(3rd rotation, radians
clockwise around z), `bz`

(2nd rotation, radians
counterclockwise around y) which implement general precesion from
epoch J2000.0, using the IAU 2006 model, for TT Julian Date
`btheta`

. Frame bias (the offset between ICRS and J2000.0)
is included. The three output variables get the same dimensions as
`jdtt`

.
`jdtt`

See also: Astronomical Coordinate Calculations