What's causing that much jitter in airspeed when on ground?

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1

Please see attached screenshot, there is no wind on ground, yet the arspd is very unstabe.
Is that due to the fact that arspd_offset is not properly configured , or could it be something else ?

It’s important to mention that arspd_ratio is well tuned, and airspeed works fine while flying.
The tuning have been done by autotune while flyingg big circles/pattern.

2

Apparently this is normal, a 4-8kmh variance on the ground, it’s supposed to stabilize and become more accurate when flying.

3

Thank you, yes it does, when airborne, the data looks very good.
I were suspecting something like that, but guessed the offset I never changed could be involved.