astroforge.coordinates.TETEDToCIRS#
- astroforge.coordinates.TETEDToCIRS(time, X)[source]#
Rotate a cartesian vector from the True Equator True Equinox of Date (TETED) coordinate system to the Celestial Intermediate Reference System (CIRS). CIRS is a geocentric coordinate system whose x-axis is in the direction of the Celestial Intermediate Origin (CIO) and whose z-axis is in the direction of the Celestial Intermediate Pole (CIP). See Kaplan (2005) for more information.
- Parameters:
time (float) – Reference epoch for the TETED frame, expressed as a Modified Julian Date (MJD) in the UT1 time system.
X (NDArray[np.float64]) – Vector to be rotated. Should have shape (3, )
- Returns:
Y – Rotated vector
- Return type:
NDArray[np.float64]