The motion correction algorithms don't properly account for declination when calculating velacc (and AccelStable, and Accel). This is because these data items are computed separately, and before any others. This won't affect data where declination was not specified, but it means that velacc is in a different coordinate system (magnetic North) than the other variables such as vel and velrot (True North), when it is.
The motion correction algorithms don't properly account for declination when calculating
velacc
(andAccelStable
, andAccel
). This is because these data items are computed separately, and before any others. This won't affect data where declination was not specified, but it means thatvelacc
is in a different coordinate system (magnetic North) than the other variables such asvel
andvelrot
(True North), when it is.