June  UTC Yes but if phrased properly it is just a statement of fact  We  simply  cannot  say  that  Winterberg  intended   for  that  application  but  it  today  is indeed  used  in  that  way  It  could  be  phrased  like  this  The general relativistically  corrected equations to properly treat signals from atomic clocks in satellites first published in  by Friedwardt Winterberg  are  today  used  by the  Global Positioning System to obtain the necessary satellite precision for GPS