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A comment on Google Nexus 4 Review. Parent comment

Re:Google Nexus 4 Review by lukeschlather on Tuesday November 13, 2012 @11:11AM (#4778692)
My understanding is that if you know your exact elevation you can determine position with only 3 satellite signals instead of 4.

https://en.wikipedia.org/wiki/GPS#Basic_concept_of_GPS

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