On the LSM9DS1 , what is the position tracking accuracy?

[Eleon BORLINI]

Hi @AMill.1​ , if you are referring to dead reckoning application family, the position accuracy depends from 2 factors: the accuracy of the sensors involved, in this case the LSM9DS1 iNemo, and the accuracy of the DR algorithm. For the first contributor, you can refer to the datasheet offset values for acc (zero g level) and gyro (zero rate level) at p.12, and related time drifts: remember that an offset is integrated during time for the 3D position calculation and must be taken into account. Regards

[Rstua.1]

Are you asking about (vehicle) dead reckoning? That's really difficult over longer time and distances. I think some vehicle GPS systems used tire rotation & steering to help out. But most are not connected that way and just stop working. That is, they don't even bother with dead reckoning.

Or are you talking about shorter distances. As in head tracking? The distances are much shorter. But the time may be just as long. And slight offsets can integrate into incorrect position calculations over that time interval. The LSM9DS1 has an integrated magnetometer. If the earth's magnetic field is available (if indoors this may not be reliable), you could use the magnetometer to help compensate for drift.