astroforge.coordinates.ITRSToTETED#

astroforge.coordinates.ITRSToTETED(time, X, V=None)[source]#

Rotate a cartesian vector from the International Terrestrial Reference System (ITRS) to the True Equator True Equinox of Date (TETED) coordinate system. See Kaplan (2005) for more information.

Parameters:

time (float) – Time epoch for the conversion, specified as Modified Julian Date (MJD), in the UT1 time system.
X (NDArray[np.float64]) – Shape (3,) position vector to be rotated
V (Optional[NDArray[np.float64]]) – Shape (3,) velocity vector to be rotated

Returns:

Y (NDArray[np.float64]) – Rotated vector
V (NDArray[np.float64]) – Rotated velocity vector. Only provided if an input velocity vector is given.