ver: T(et-lt) - O(et).

                 SSB --&gt; O(et)
                / |    *
               /  |  *  T(et+lt) - O(et)
              /   |*
             /   *|
            V  V  V
        T(et+lt)  T(et)

      The position component of the light-time corrected state
      is the vector

         T(et+lt) - O(et)

      The velocity component of the light-time corrected state
      consists of the difference

         T_vel(et+lt)*(1+d(lt)/d(et)) - O_vel(et)

      where T_vel and O_vel are, respective