Figure XI-1: The photo of the 3D-printed verification platform with the two sensors fixed on it.

Figure XI-2: Real-time angle measurement over a 30-second duration when the sensors and the accompanied testing platform are placed vertically.

Figure XI-3: Real-time angle measurement over a 30-second duration when the sensors and the accompanied testing platform are positioned neither horizontally nor vertically.

Figure XI-4: Fitted model of the data processing time versus session duration.