def METHOD_NAME(tle_path, center_datetime):
    """Open the TLE file and read."""
    with open(tle_path, "r") as fd:
        tle_text = fd.readlines()
        if acquisition.tag == "LS5":
            tle1, tle2 = tle_text[7:9]
        if acquisition.tag == "LS7":
            tle1, tle2 = tle_text[1:3]
        return ephem.readtle(acquisition.platform_id, tle1, tle2)