 When a 
   geometric position or state vector is modified to reflect how it 
   appears to an observer, we describe that vector by any of the 
   terms &quot;apparent,&quot; &quot;corrected,&quot; &quot;aberration corrected,&quot; or &quot;light 
   time and stellar aberration corrected.&quot; The SPICE Toolkit can
   correct for two phenomena affecting the apparent location of an
   object:  one-way light time (also called &quot;planetary aberration&quot;) and
   stellar aberration.

   One-way light time