4.1.15. Bottom interference¶
Sometimes when the bottom is too close to the instrument or near the end of the instrument’s range, the UHDAS automated at-sea processing cannot identify the bottom by a simple algorithm. There may be artifacts left in the ocean velocities, which should be edited out by hand.
BEFORE
![ADCP data: some bottom interference not edited out](../../../_images/bottom_interference_atsea.png)
AFTER
![ADCP data: bottom interference after hand-editing](../../../_images/bottom_interference_afteredit.png)