@staticmethod
def _normalized_position_vector(observer, target):
    '\n        Calculate the normalized position vector between two frames.\n\n        Parameters\n        ----------\n        observer : `~astropy.coordinates.BaseCoordinateFrame` or `~astropy.coordinates.SkyCoord`\n            The observation frame or coordinate.\n        target : `~astropy.coordinates.BaseCoordinateFrame` or `~astropy.coordinates.SkyCoord`\n            The target frame or coordinate.\n\n        Returns\n        -------\n        pos_hat : `BaseRepresentation`\n            Position representation.\n        '
    d_pos = (target.cartesian.without_differentials() - observer.cartesian.without_differentials())
    dp_norm = d_pos.norm()
    dp_norm[(dp_norm == 0)] = (1 * dp_norm.unit)
    pos_hat = (d_pos / dp_norm)
    return pos_hat
Calculate the normalized position vector between two frames.

Parameters
----------
observer : `~astropy.coordinates.BaseCoordinateFrame` or `~astropy.coordinates.SkyCoord`
    The observation frame or coordinate.
target : `~astropy.coordinates.BaseCoordinateFrame` or `~astropy.coordinates.SkyCoord`
    The target frame or coordinate.

Returns
-------
pos_hat : `BaseRepresentation`
    Position representation.
@staticmethod
def _normalized_position_vector(observer, target):
    '\n        Calculate the normalized position vector between two frames.\n\n        Parameters\n        ----------\n        observer : `~astropy.coordinates.BaseCoordinateFrame` or `~astropy.coordinates.SkyCoord`\n            The observation frame or coordinate.\n        target : `~astropy.coordinates.BaseCoordinateFrame` or `~astropy.coordinates.SkyCoord`\n            The target frame or coordinate.\n\n        Returns\n        -------\n        pos_hat : `BaseRepresentation`\n            Position representation.\n        '
    d_pos = (target.cartesian.without_differentials() - observer.cartesian.without_differentials())
    dp_norm = d_pos.norm()
    dp_norm[(dp_norm == 0)] = (1 * dp_norm.unit)
    pos_hat = (d_pos / dp_norm)
    return pos_hat