Is Z always up relative to the earth (independent of the ADCP orientation), or does it just point up the ADCP tube?
FollowThe XYZ coordinate system is fixed to the instrument regardless of the orientation, and the Z coordinate points in the direction the beams are pointing, but perpendicular to the head of course. In the case of a standard head like AquaPro, the direction of the Z coordinate is then from the end-bell with the connector towards the sensor head.
The XYZ coordinates is right-handed coordinate system. More about this can be found in the Comprehensive Manual - ADCP.
If recorded in ENU coordinates, U is always up regardless of the ADCP orientation.
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