ITERATE getseconds(s)
{
        local dt, ux;

        if (argc < 1 || not(isarray(s)))
        {
                 error(sprintf("%s - input series required", __FUNC__));
        }

        /* get date time in UTC */
        dt = getdt(s, 1);

        ux = dt2unix(dt);

        return(ux);
}