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A comment on iPhone 14 Pro comes with dual-frequency GPS. Parent comment
When you only way have one radio signal from a satellite, it is impossible to tell how the ionosphere has effected the signal.
When you have two, and each a slightly different frequency, you can model signal path changes and apply some corrections for better general accuracy.
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When you only way have one radio signal from a satellite, it is impossible to tell how the ionosphere has effected the signal.
When you have two, and each a slightly different frequency, you can model signal path changes and apply some corrections for better general accuracy.