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A comment on IPhone 4S has GLONASS in addition to GPS. Parent comment

Re:IPhone 4S has GLONASS in addition to GPS by singular on Wednesday October 19, 2011 @11:00AM (#3130423)
It's funny you mention that, as I swear the professor said it could be done to accuracy of mm, but after reviewing the wikipedia articles I had concluded I misremembered. Perhaps not...
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Re:IPhone 4S has GLONASS in addition to GPS by juiceandjuice on Wednesday October 19, 2011 @12:43PM (#3130909)
You can, but you need to need to analyze the phase of the GPS signals at the analog level (not the the code phase)
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Re:IPhone 4S has GLONASS in addition to GPS by CamperBob on Wednesday October 19, 2011 @05:22PM (#3132161)
So the carrier phase is derived from the Cs/Rb clocks on the satellites? That's pretty neat, if so.
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