Algorithm 1.

Start and Stop Detect with Monotonic Filter

Input: φ(t)
Output: φf(t)
1:	Initialize φf(t) = φ(t), stopped = false;
2:	if stop detected then
3:	stopped = true;
4:	else
5:	if |φ(t) − φf(t − Δt)| ≤ Δφ then
6:	stopped = false;
7:	end if
8:	end if
9:	if stopped = true or $-\frac{3\pi }{2}<\phi (t)-{\phi }_f(t-\mathrm{\Delta }t)<0$ then
10:	φf(t) = φf(t Δt);
11:	else
12:	φf(t) = φ(t);
13:	end if