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A Prototype Optical Tracking System Investigation and Development - page 162 / 170

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162 / 170

148

Outlier

nalysis

0.045

0.04

0.035

Std. Dev. Y

0.03

0.025

0.02

0.015

0.01

0

200

400

600

800

1000

Time

Figure G.1 A train passing the testing site causes a spike in standard deviation. Here the effects of the train can be seen passing at the beginning of the measurement. This causes spikes in the standard deviation of a window of 100 samples. As the train passes the standard deviation in the Y coordinates drops. The shape of this graph is important as it shows high values while the train is nearby and low values after the train has passed.

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