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Why does the speed go up and down?

edited January 23 in RaceChrono for Android
Why does the speed go up and down?(0.1~ 0.2 kph)
Gps made of self-creation is in use. (ublox)

Photo :


  • There's nothing in the photo link. But I'm guessing the problem is RaceChrono displays speed 0.1 - 0.2 kph when stationary? RaceChrono uses the speed that your GPS reports. It's normal for the GPS to report "noise" in speed. You could probably do some kalman filtering using acceleration sensor if you want speed with less noise...
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