I'm sorry to ask question with clumsy English.

I'm using the ADIS16488A with Raspberry Pi, and success to get Gyro and Accel data at 2460SPS with Data Ready Flag.

But the angle data ,integrated by Gyro, sometimes over 1 deg when measuring 1 minute.

ADIS16488A's In-Run Bias Stability is 5.1deg/hr, but the angle will over 60deg when muliplicate 60.

Could you tell me that this calclation result is correct?

Or, how can I calculate In-Run Bias Stability?

For the example data, I attached the Gyro and Accel data measuring 1 minute.

The In-run Bias Stability (IRBS) represents the minima of the Allan Variance curve. This metric represents the best resolution available, when all influential conditions are well controlled. Here is a discussion thread that might help you in measuring this parameter:

FAQ: Gyroscope In-Run Bias Stability