"I thought we had fixed this" — and we had not, we had only raised the number.
The antenna moves a few degrees in the wind and the Stop button lights up and
goes out, all evening, on a mast that has not turned.
A threshold cannot tell the two apart at any setting. A gust pushes a beam past
four degrees and brings it back — 100°, 105°, 100°, 106° — and every one of those
excursions cleared the threshold. Raising it only raises the wind speed it takes,
and blunts the detection of a rotor genuinely creeping.
What separates a rotation from the weather is not amplitude, it is SIGN. A rotor
under power advances; a gust reverses. So a step is only movement when the
previous step went the same way: wind gives +5, −5, +5 and never two in a row,
while a rotor gives +4, +4, +4 and is announced on the second — one poll, about
a second, on a mast that takes half a minute to cross a pass.
The threshold stays, doing the job it is actually good at: ignoring the degree
or two of potentiometer noise that is not a step at all.
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>