Underway hull-mounted ADCP data were collected throughout the cruise using two independent systems. These were a 75 kHz Ocean Surveyor (OS75) and a 150 kHz Ocean Surveyor (OS150) ADCP (both from Teledyne RD Instruments). UHDAS data acquisition software from University of Hawaii was used to collect raw ADCP data from each instrument. Five-minute final processed data were available in absolute velocity profiles throughout the cruise. Barotropic tidal velocities were then removed using Matlab OTIS tidal predictions, kindly provided by Laurie Padman, Earth Systems Research.
The OS150 and OS75 systems recorded data throughout the entire cruise. Special care was taken to steam at a slower speed (12 kts, or 10 kts during high-wind conditions) during survey sections to ensure higher data quality and greater data return. The overall quality of the SADCP data was good, with the exception of survey locations associated with water depths of 30 m or less. In areas with shallower water depths, the SADCP data return was minimal due to the frequency ranges used. Please see cruise report for more details.
The final quality-controlled and edited ADCP section files will be made available here when finished.