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I'm analyzing gyroscope + accelerometer data acquired from an IMU for a run of a water skiing slalom course, sampled at 100Hz.

The double spikes represent spurious ~15G jitter from crossing both wakes.

My question is two-fold:

  • How can I use the fact that the skiier traverses through known positions along the course to determine a dead-reckoning for spatial position?

  • How do I filter/account for the two impulses that don't represent the true acceleration of the skiier?

A graph of a sample data representing a run: Acc. data

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