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Why do I need to calibrate my iPhone when using RaceDataAX?

April 26, 2017calibrate iPhone racedataax

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Why do I need to calibrate my iPhone when using RaceDataAX?

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The iPhone contains a three-axis accelerometer. Each axis can respond differently to forces of the same magnitude. In order to record accurate values, the software needs to correct for any differences in the measurements coming from the sensor in the iPhone. The only way to do this is to see how each sensor measures a known force.