get_gcrf_state_vector
=====================

.. py:function:: pride.astro.get_gcrf_state_vector(target: str, epochs: numpy.ndarray) -> numpy.ndarray

   Get cartesian state vector of a target in GCRF (SI units)

   Uses spice.spkezr to get the position of a target in J2000, with respect to EARTH, and with aberrations set to NONE. The output is transformed to SI units and casted to an (N, 6) numpy array.

   :param target: Target name known by spice
   :param epochs: Array of epochs in ET (TDB seconds past J2000)
   :return position_vector: Aberrated, cartesian state vector of the target with respect to EARTH in J2000 (GCRF) frame.