Next: pop, Previous: poly, Up: Internal Routines [Contents][Index]

`pom00(`

`xp`, `yp`, `sp`)

[SOFA] Returns the matrix of polar motion, IAU 2000, given the
coordinates

, `xp`

of the pole and tio
locator `yp`

, all in radians. The tio locator positions
the Terrestrial Intermediate Origin on the equator. It is obtained
from polar motion observations, so is in essence unpredictable. The
current function implements an approximation based on the dominant
secular drift of about 47 microarcseconds per century. All arguments
must have the same dimensions. The result has those same dimensions
as well, with two dimensions equal to 3 prefixed.
`sp`

See also: Astronomical Coordinate Calculations