ion of precision of
                             light time corrections.

                  &quot;CN+S&quot;     Converged Newtonian light time
                             correction and stellar aberration
                             correction.
 
 
               The following values of 'abcorr' apply to the 
               &quot;transmission&quot; case in which photons *depart* from 
               the observer's location at `et' and arrive at the 
               target's location at the light-time corr