From: relativity@paulba.no   
      
   Den 22.11.2025 09:41, skrev Thomas Heger:   
   > Am Freitag000021, 21.11.2025 um 20:15 schrieb Paul B. Andersen:   
   >> Den 21.11.2025 11:46, skrev Thomas Heger:   
   >>> Am Dienstag000018, 18.11.2025 um 21:39 schrieb Paul B. Andersen:   
   >>>> It is an indisputable fact that SR and GR give precise   
   >>>> predictions for what will be measured in well defined experiments.   
   >>   
   >>> Again: you are a hopeless case!   
   >>>   
   >>> You HAVE to distinguish between a model and the real world, even if   
   >>> the model is quite good.   
   >>>   
   >>> This is so, because model and real world 'live' in different domains.   
   >>   
   >> You are claiming that theories of physics can't make predictions   
   >> of what will be measured in the real world, because a mathematical   
   >> model has nothing to do with the real world.   
      
   > No, I didn't say that.   
      
   So you didn't say that theories of physics can't make precise   
   predictions of what will be measured in the real world, you said   
   that theories of physics can make precise predictions of what   
   will be measured in the real world. Right?   
      
   >   
   > Of course models use all kinds of mathematics. But models are,   
   > nevertheless, different to what they model, .   
   >   
   > And even good models are still models (and NOT real).   
      
   Why are stating obvious trivialities in stead of   
   addressing the issue?   
      
   Please respond to the following:   
      
      
   The orbital time of a GPS satellite is half a sidereal day,   
   that is 43082.045250000 s measured by a clock on the geoid.   
      
   GR predicts that the orbital time measured by a clock in   
   the GPS satellite will be:   
     43082.045250000⋅(1 + 4.4647e-10) s = 43082.045269235 s,   
     that is 19.235 μs more than measured on the ground.   
      
   See:   
   https://paulba.no/pdf/Clock_rate.pdf   
      
   This prediction is confirmed by real measurement   
   in the real world:   
   See:   
   https://paulba.no/paper/Initial_results_of_GPS_satellite_1977.pdf   
      
   It is even better confirmed by 48 years service of GPS.   
      
      
   This is an example where GR gives a precise prediction of what   
   will be measured in the real world, and the prediction is confirmed   
   to be in accordance with real measurements in the real world.   
   It is an indisputable fact that SR and GR give precise   
   predictions for what will be measured in well defined experiments.   
      
   Do you still think that I am a hopeless case when I say:   
   "It is an indisputable fact that GR give precise predictions   
     for what will be measured in the real world"?   
      
   --   
   Paul   
      
   https://paulba.no/   
      
   --- SoupGate-Win32 v1.05   
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