Home altitude takeoff and landing mismatch

[JJstar]

I have had 2 flights in a row that have been uneventful except for the fact that the landing altitude is about 40ft lower than takeoff . I am landing and taking off in the exact same place . Anyone know why this would happen. I calibrated the compass...unit behaves as normal.

 

[HFMan]

Temperature drift in the barometer. Really nothing to get too worried about.

 

[msinger]

I calibrated the compass...unit behaves as normal.

Are you able to reproduce that every time? If so, try calibrating the IMU.

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[JJstar]

This calibration video appears to have solved the issue. My last two flights after the IMU calibration have been spot on takeoff and landing heights . I would not expect to focus there as I am novice. Thank you for your reply and help