From: PointedEars@web.de   
      
   amirjf nin wrote:   
   > Has anyone tried Michelson-Morley-type experiments with the ECI in mind?   
      
   What do you mean by "Michelson-Morley-type experiment" and "with the ECI in   
   mind"?  What are you getting at?   
      
   *An* ECI (Earth-centered inertial) coordinate frame is a useful theoretical   
   model for describing satellite orbits and analyze relativistic effects such   
   as "gravitational time dilation" (scare quotes intended; it is a convenient   
   misnomer), not something that can be realized physically/experimentally:   
   there is no object that can practically be at rest in an ECI.   
      
      
      
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   PointedEars   
      
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