astroforge.coordinates.ITRSToMEMED#
- astroforge.coordinates.ITRSToMEMED(time, X)[source]#
Rotate a cartesian vector from the International Terrestrial Reference System (ITRS) to the Mean Equator Mean Equinox of Date (MEMED) coordinate system. See Kaplan (2005) for more information.
- Parameters:
time (float) – Reference epoch for the MEMED coordinate system, specified as Modified Julian Date (MJD), in the UT1 time system.
X (NDArray[np.float64]) – Shape (3,) cartesian vector to be rotated from ITRS to MEMED
- Returns:
Rotated vector
- Return type:
NDArray[np.float64]