Hi, here are the results of the ground test.
I did the following:
a) Minute 1: Arm the copter in Alt Hold and give just enough throttle so the copter doesn't disarm but doesn't go in the air either;
b) Minute 2: Take off and hover in Alt Hold @ 2 meter;
c) Minute 3: Hover in Loiter @ 2 meter;
d) Minute 4: Land a keep the motors spinning in stabilize .
So, in minute 1 and minute 4 the copter is standing stationary on the ground. These timeslots are marked in the green boxes in the log graph:
(the red line in the middle is my SF11 laser rangefinder - the complete log file is here).
So, the baro is very noisy at all times, it doesn't matter whether the copter is on the ground or not.
Any ideas on how to fix this?