def vhat(v1):
    """
    Find the unit vector along a double precision 3-dimensional vector.

    http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/vhat_c.html

    :param v1: Vector to be unitized. 
    :type v1: 3-Element Array of floats
    :return: Unit vector v / abs(v).
    :rtype: 3-Element Array of floats
    """
    v1 = stypes.toDoubleVector(v1)
    vout = stypes.emptyDoubleVector(3)
    libspice.vhat_c(v1, vout)
    return stypes.cVectorToPython(vout)
Find the unit vector along a double precision 3-dimensional vector.

    http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/vhat_c.html

    :param v1: Vector to be unitized. 
    :type v1: 3-Element Array of floats
    :return: Unit vector v / abs(v).
    :rtype: 3-Element Array of floats