Altimeter readings are not stable

ArduCopter
1

When I’m on the ground, the altimeter isn’t stable and the numbers go up and down.

  • External barometer is not connected

I am using PIXHAWK 2.4.8.

https://drive.google.com/file/d/10XOQwUtCwxY2OVC45WW9rlBhz51InNQv/view?usp=sharing

2

Did you experience this after the ground start immediately or after some minutes?
I am seeing GPS No Fix, wait for the fix.
After the fix, did you see these fluctuations again?
Also, did you do calibrations?

3

I watched your video. It looks like a calibration issue. Do the calibrations and make sure the GPS is fixed. Thats all.

4

Let’s FIX GPS.

What is calibration?
Is it a barometer calibration?

5

GPS will fix itself.
Go outside and wait.
Did you do mandatory hardware calibrations?
For example acceloremeter calibration.
https://ardupilot.org/copter/docs/common-accelerometer-calibration.html

6

Compass and acceleration calibration have been completed.
On a sunny day, GPSFIX will be used to confirm and contact you.

7

GPS Fix means GPS lock. Wait it to connect the GNSS Satellites

8

I am doing GPS FIX, but the altitude is not stable.
Various calibrations have been completed.

https://drive.google.com/file/d/1P9lBmVbrQRMYum43RsDKNywuhD3SWuC5/view?usp=sharing