def METHOD_NAME():
    spec_at, cor_z = perform_attenuation()
    ref = np.load(REFERENCE_RAYS_FILE)
    assert_allclose(ref["spec_at"], spec_at["data"], rtol=1e-2, atol=1e-3)
    assert_allclose(ref["cor_z"], cor_z["data"].data, rtol=1e-2, atol=1e-3)