Predicted tides were applied to the data in real time using predicted tides downloaded from NOAA's National Ocean Service Center for Operational Oceanographic Products and Services (CO-OPS) website.
Horizontal accuracy is ~5m, DGPS from NavCom sensor from C&C Technologies was used, vertical accuracy is depth dependent (~1% of water depth), WGS84 datum. These data are not to be used for navigation. Depths mapped range from 5 - 200 m. The AHI was deployed from the NOAA Ship Hi'ialakai and concurrent mapping was done using the Simrad EM300 sonar aboard the ship; metadata for HI0804 are submitted separately.
The AHI's equipment serial numbers, software versions and sensor configuration settings are as follows:
RESON 8101-ER multibeam echosounder Transducer serial #: 201004 Firmware, dry: 8101-2.09 - E34D Firmware, wet: 8101-1.08 - C215 Note: the Sonar processor used was a rental unit from Ashtead Technologies, because of a failure of the Reson sonar processor owned by PIFSC and normally used aboard the R/V AHI.
R/V AHI POS/MV Model 320, version 4.0000 PCS serial #: 2514 IMU serial #: 203 Controller software: v 220.127.116.11 PCS Firmware: 3.41
Seabird SBE19 CTD: Serial #: 3029 Calibrated 12/28/2006
C&C Technologies NavCom Serial #5111
R/V AHI Lever Arm Distances and Alignment Offsets: The R/V AHI Reference Point (RP) is defined to be the intersection of the vessel's centerline, the cabin deck and the bulkhead immediately aft of the transducer. This is marked by a punch in the deck weld at that location. Positive X means the point is forward of the RP, positive Y means the point is to starboard of the RP, positive Z means the point is below the RP. The loaded waterline is defined as the intersection of the vessel?s performance wing with the hull at the transom. A vessel offset survey and patch test were performed in April 2008 and the settings shown here reflect these data.
POS/MV Settings: RP to IMU, m 0.796 0.001 0.078 RP to Primary GPS(port),m 0.869 -0.472 -2.284 RP to Vessel, m 0.144 0.009 0.786 IMU w.r.t. Ref. Frame, deg 0.000 0.000 0.000 RP to Heave lever arm, m -0.670 0.000 0.000 RP to Sensor 1(MB transducer), m 0.144 0.009 0.786 RP to Sensor 2 0 0 0 Sensor 1 rotation Ref. Frame, deg 0 0 0 Sensor 2 rotation Ref. Frame, deg 0 0 0 Antenna Baseline Distance: 1.229
ISS2000 Settings for RESON DTC (determined in April 2008 patch test): Roll Bias, deg 0.38 Pitch Bias, deg 0.05 Gyro Bias, deg 0.0 Transducer depth, m 0.62
Resource Description: Reson 8101ER Multibeam Sonar Data from Cruise AHI0701 (R/V AHI)
Data Format: Generic Sensor Format, as described in <http://www.ldeo.columbia.edu/res/pi/MB-System/formatdoc/gsf_spec.pdf>