A compass rose (23) is arranged according to the magnet pole direction to determine North direction and azimuth. The support is free to rotate on the base and enables direct read-off of North direction.doi:DE202006001096Tsai
with a second different device context indicated by the respective system signal corresponding to the current operation of the respective device, then causing the device context information generated by the probabilistic model for the respective measurement epoch to include a contribution from the ...