def METHOD_NAME():
    """Perform attenuation correction on a single ray radar."""
    radar = pyart.testing.make_single_ray_radar()
    a = radar.fields["reflectivity"]["data"]
    radar.fields["reflectivity"]["data"] = np.ma.array(a)
    (
        spec_at,
        pia_dict,
        cor_z,
        spec_diff_at,
        pida_dict,
        cor_zdr,
    ) = pyart.correct.calculate_attenuation_philinear(
        radar, pia_coef=0.06, pida_coef=0.8, fzl=4000.0, doc=0.0, temp_ref="fixed_fzl"
    )
    return spec_at, pia_dict, cor_z, spec_diff_at, pida_dict, cor_zdr