Do you have any aging data related to the one year bias stability?
The key limitation is in the ARW (Acceleration Random Walk). For the
accelerometer in the ADIS16209, the ARW is ~30ug/sqrt(hour). If we look at
this over a one year period, we can calculate it in the following manner:
Error = 0.00003 x sqrt(365x24) = 2.8mg
Angle-error = asin(0.0028) = 0.16 deg