def METHOD_NAME(self, filename):
    """
    Get coordinates and displacements at stations for Green's function responses.
    :param filename: Name of HDF5 file with point data from PyLith Green's function simulation (Step 5_).
    """
    h5 = h5py.File(filename, "r")
    xy = h5['geometry/vertices'][:,0:2]
    displacement = h5['vertex_fields/displacement'][:]
    h5.close()
    # Sort stations by y coordinate.
    reorder = numpy.argsort(xy[:,1])
    self.station_responses = displacement[:,reorder,:]