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→Question about GPS
Does Newtonian mechanics predict that clocks on GPS satellites will diverge from clocks on earth? That is not an easy question to answer.--[[User:Aschlafly|Aschlafly]] 11:32, 28 July 2007 (EDT)
Does Newtonian mechanics predict that clocks on GPS satellites will diverge from clocks on earth? That is not an easy question to answer.--[[User:Aschlafly|Aschlafly]] 11:32, 28 July 2007 (EDT)
:As far as I'm aware, no. It's relativity that predicts that there will be a divergence in time, for reasons already discussed. However, I want to throw in: both of you aruging about whether GPS satellites use relativity are correct in certain ways. Andy, you're correct that there is no actual use of relativity on the circuits on board the satellite. For those arguing that relativity is used, you're correct too; based on predictions from both general and special relativity, the clocks on the satellites are fine tuned with an offset to minimize the nano-second order deviations from clocks on the ground. Then, for practical purposes, newtonian based approximations are acceptable accuracy-wise. [[User:Stryker|Stryker]] 14:08, 30 July 2007 (EDT)