I'm trying to become educated on IMU specifications, and my understanding is that when comparing IMUs, the Gyros make the big difference. I am looking at the InertialLabs IMU-Nav-100:
They specify the "bias instability over temperature range" as being 15deg/hr. What exactly does this mean?
I have an understanding of what a regular gyro bias instability looks like: a wandering bias with some standard deviation and time constant. But I don't know what the "over temperature range" looks like or means.
Does this mean that, over the operating range, in the worst case (at a particular temperature) the moving bias has a standard deviation of 15deg/hr, and therefore some temperatures are better than others? Does it matter since the document also states that it is "internally calibrated for temperature?"