def stationlist2filelist(slo):
    """
    Input a stationlist object (slo). From this extract the station codes and
    create a list of file names that represent long period data files
    """
    site_list = slo.getStationList()
    files = []
    for sta in site_list:
        fname = "%s" % (sta.scode)
        files.append(fname)

    return files