What does IMU instance mean under vibe in the logs?

ArduCopter Copter 4.5
1

Just trying to figure this out?

image

2

Instance index of logged IMU. It’s an artifact of the logger and can generally be ignored for analysis. I would expect the one in your screenshot to be 1 forever.

3

Ok perfect I just was digging through some logs and was wondering.

Thank you!