GPS accuracy in apple watch ultra vs series 4 : r/AppleWatch
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GPS will be accurate within one foot in some phones next year - The Verge
GPS on smartphones: Testing the accuracy of location positioning
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Smartphone GPS accuracy study in an urban environment | PLOS ONE
Amazon.com: Car GPS Tracker for Vehicles Real-time Locator GPS/GSM/GPRS/SMS Tracking Cars Antitheft with Mobile APPs : Electronics
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We Tested Mobile GPS/GNSS Accuracy and Found Some Surprising Results | by !important Safety Technologies | Medium
Global satellite positioning. What GPS is and how it has changed the world — Журнал The Universemagazine Space Tech
Superaccurate GPS Chips Coming to Smartphones in 2018 - IEEE Spectrum