Distance
|
Mean, SD, IQR, Skewness, Kurtosis
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GPS
|
Euclidean distance between consecutive GPS points along a trajectory.
|
[c@32060]
[c@32061]
[c@32062]
|
Speed
|
Rate of change in net displacement
|
Net displacement
|
The squared net displacement between the current relocation and the first relocation of the trajectory.
|
Height
|
Relative altitude of a point along the trajectory from the ground.
|
Relative turning angle
|
A relative angle between successive GPS points along a trajectory.
|
Vector magnitude of acceleration
|
Accelerometer
|
A square root of the squared sums of directional accelerations along X,Y and Z axes.
|
Peak intensity of acceleration
|
Max
|
The number of the signal (acceleration) peak appearances within a certain period of time ‘t’
|
[c@32059]
[c@32063]
|
Dominant frequency of acceleration
|
Max
|
The peak (max) acceleration obtained after performing a Fast Fourier transform on the acceleration signal.
|
Signal power of acceleration
|
Mean
|
The instantaneous power of the acceleration signal – calculated as the square of the acceleration magnitude at instant ‘t’
|