   &quot;reception&quot; case in which photons depart from the
               intercept point's location at the light-time
               corrected epoch et-lt and *arrive* at the observer's
               location at 'et':


                  'LT'       Correct for one-way light time (also
                             called &quot;planetary aberration&quot;) using a
                             Newtonian formulation. This correction
                             yields the location of the surface
          