Measurement features

Motion

Motion features

ΔTime

Δ t_{i} = t_{i} - t_{i - 1}

ΔPosition

Velocity

Distance

d_{i} = ∥ Δ X_{i} ∥

Speed

v_{T} = \frac{s _{T}}{T}

Heading

Elevation

Acceleration

a_{i} = ∥ \frac{v _{i} - v _{i - 1}}{Δ t _{i}} ∥

AccelerationT

a_{T i} = a_{i} \cdot \frac{v _{i - 1}}{∥ v _{i - 1} ∥}

AccelerationN

a_{N i} = a_{i}^{2} - a_{T i}^{2}

ΔHeading

ΔElevation

Turning Rate

Pitching Rate

Path Length

s_{i} = k = 0 \sum i d_{k}

Path Speed

Line Length

L_{T} = ∥ X_{N} - X_{0} ∥

Line Speed

\overset{ˉ}{l}_{i} = \frac{L _{i}}{t _{i} - t _{0}}

Straightness

Child Calculated