How come everyone here believes without question the statement in the original article that "the engineers who designed the GPS system included these relativistic effects when they designed and deployed the system." The author gives no evidence for this claim. In fact the research was classified and he cannot offer evidence even if he tried. See references in this comment http://science1.wordpress.com/2010/10/11/if-newton-were-to-c... which says that "Nevertheless, in practice, neglect of relativity does not now contribute measurably to the GPS error budget, as the OCS software is currently configured. (p.194)" cited in this source GPS AND RELATIVITY: AN ENGINEERING OVERVIEW Henry F. Fliegel and Raymond S. DiEsposti http://tycho.usno.navy.mil/ptti/1996/Vol%2028_16.pdf
I am always amazed how normally skeptical people suspend their skepticism and believe anything a physicist or a learned doctor writes. I would be grateful if you can supply a real evidence that without GR GPS will not work.
I am always amazed how normally skeptical people suspend their skepticism and believe anything a physicist or a learned doctor writes. I would be grateful if you can supply a real evidence that without GR GPS will not work.