Could you please explain what system message
Ekf2 imuo is using gps
On osd means?
Thanks!
That will come up when the Extended Kalman Filter for AHRS (Attitude Heading Reference System) with GPS is being used. Without GPS the INS (Inertial Navigation System) is used. Usually you can look at the messages and see when the INS and GPS systems are being used.
Thanks for explaining me 
Hello, I recently experienced this message, which seemed to be linked to my altitude suddenly shifting from the initial barometer calibrated value. Any idea as to why this might occur, and how I could correct?