Moving average / flight detection about igc-xc-score

[mmomtchev]

All the points are valid 😄
But the launch/landing detection is not on the time critical path, this will be barely noticeable
I think I will leave this for an eventual 1.7

[JEK58]

I stumbled across the flight detection:

const definitionFlight = {
    t: 60,
    x0: 1.5,
    xt: 5,
    z0: 0.05,
    zt: 0.9
};

What does xt and zt mean? It's not described in he comment of the file.
t would imply time but in the code it's compared to hma & vma which would not make sense if it's a time value.
What am I missing?

[mmomtchev]

Launch detection requires that the horizontal and vertical moving averages raise above xt/zt and then stay above x0/z0 for at least t seconds - the launch is considered to have happened at the xt/zt.

It is probably t for threshold or maybe t for take-off - I don't remember anymore.

[JEK58]

Thanks for clearing things up!