ing (2) into the
      right hand side of the light-time equation (1) yields the
      &quot;one-iteration&quot; estimate of the one-way light time (&quot;LT&quot;).
      Repeating the process until the estimates of `lt' converge yields
      the &quot;converged Newtonian&quot; light time estimate (&quot;CN&quot;).

      Subtracting the geometric position of the observer O(et) gives
      the position of the target body relative to the observer:
      T(et-lt) - O(et).

         SSB ---&gt; O(et)
        