<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def ut1_jd(self, jd):
 """Build a `Time` from UT1 a Julian date. Supply the Universal Time (UT1) as a Julian date: 2456675.56640625 """

        ut1 = _to_array(jd)

        # Estimate TT = UT1, to get a rough Delta T estimate.
        tt_approx = ut1
        delta_t_approx = interpolate_delta_t(self.delta_t_table, tt_approx)

        # Use the rough Delta T to make a much better estimate of TT,
        # then generate an even better Delta T.
        tt_approx = ut1 + delta_t_approx / DAY_S
        delta_t_approx = interpolate_delta_t(self.delta_t_table, tt_approx)

        # We can now estimate TT with an error of < 1e-9 seconds within
        # 10 centuries of either side of the present; for details, see:
        # https://github.com/skyfielders/astronomy-notebooks
        # and look for the notebook "error-in-timescale-ut1.ipynb".
        tt = ut1 + delta_t_approx / DAY_S
        t = Time(self, tt)
        t.ut1 = ut1
        return t