def create_ssd_filename(band, eclipse):
    """
    Returns the Stim Separation Data (SSD) calibration file name.

    :param band: The band to create the SSD for, either 'FUV' or 'NUV'.

    :type band: str

    :param eclipse: The eclipse number to create the SSD file for.

    :type eclipse: int

    :returns: str -- The name of the SSD file to create.
    """
    return 'SSD_' + band.lower() + '_' + str(eclipse) + '.tbl'
