The IMU ADIS16475-2 is kept at stationary (@ Constant temperature) data logged at rate of 100Hz into CSV file. If we integrate gyro X,Y and Z independently at rate of 0.01sec.the gyroscope integrated values after 1 hr as follows. The integration was done after 10 sec from power ON by compensating each gyro axis OFFSET. This OFFSET is calculated for 10sec from POWER ON.

X --> -125.5 deg

Y--> 44 deg

Z-->90 deg.

If we integrate gyro X,Y and Z independently at rate of 100sec i.e integration time dt is taken as 100 and integrated for every 100sec gyro sample. The gyroscope integrated values after 1 hr as follows. The integration was done after 100 sec from power ON by compensating each gyro axis OFFSET. This OFFSET is calculated for 100sec from POWER ON.

X --> -112 deg

Y--> 52deg

Z-->89deg.

In ADIS16475-2 datasheet Bias instability is given as 2.5 deg/hr but in practical it is drifted too much.

Please suggest , is the above results are valid or not?