def METHOD_NAME(iargs=None):
    # parse
    parser = create_parser()
    inps = parser.parse_args(args=iargs)
    # import
    from mintpy.utils import readfile
    # check: input file coordinates system (required in geo)
    atr = readfile.read_attribute(inps.ts_file)
    if "Y_FIRST" not in atr.keys():
        raise ValueError(f"input file {inps.ts_file} is NOT geocoded")
    # default: auxliary files
    inps = get_aux_filename(inps)
    # check: existence of auxliary files
    for fname in [inps.vel_file, inps.tcoh_file, inps.mask_file]:
        if not os.path.isfile(fname):
            raise FileNotFoundError(f'required auxliary file {fname} NOT found!')
    return inps