The Instinct 2 is a rugged GPS smartwatch with durable construction, 100m water resistance, and 28-day battery life. It offers multi-sport tracking, advanced health monitoring (heart rate, stress, ...
[superlopez] sent in this detailed article (mirrored here and here) which describes how to build a GPS and GLONASS (the Russian version of GPS) receiver. The resulting device is gigantic compared ...
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