Predicted tides were applied to the data in real time using tide zoning and predicted tides supplied by NOAA's National Ocean Service Center for Operational Oceanographic Products and Services (CO-OPS). At Kure Atoll, Sand Island (1619910) predicted tides were used in zone HI48. At Pearl and Hermes Atoll, Sand Island (1619910) predicted tides were used for zones HI46 and HI47. At Midway island, Sand Island (1619910) predicted tides were used for tide zone HI47. At Kauai Island, Nawiliwili (1611400) predicted tides were used for tide zones HI137, HI139, HI152, HI153, HI154, and HI155.
Horizontal accuracy is 20m (no differential GPS correctors applied), vertical accuracy is depth dependent (~1% of water depth), WGS84 datum. These data are not to be used for navigation. Depths mapped range from 2 to 3050 m. Concurrent mapping was done by the R/V AHI in water depths ranging from ~2-300 m with the data set being AHI-06-09; metadata for AHI-06-09 are submitted separately.
The Hi'ialakai's equipment serial numbers, software versions and sensor configuration settings are as follows:
SIMRAD EM300 multibeam echosounder Serial #: 303 PU Software Versions: 1.1.3 040427,2.0.0 040614,2.3.2 040615,2.0.1 040629 SIS Software Version: 1.0, build 117, July 2, 2004
SIMRAD EM3002D multibeam echosounders Serial #: 357 and 353 PU Software Versions: HCT: 2.0.7 040906 BSP67 Master: 1.2.7 040830 BSP67 Slave: 1.2.7 040830 PU: 1.6.8 050118 DDS: 3.17 2004/06/11
SIS Software Version: 2.5, build 47, April 1, 2005
HI'IALAKAI POS/MV Model 320, version 3 PCS serial #: 295 IMU serial #: 1333 PCS Firmware: 2.21, Feb 02, 2006 Controller software: v 2.1
Seabird SBE 9/11 plus CTD: Serial #: 09P35130-0737
Hi'ialakai Lever Arm Distances and Alignment Offsets: The Hi'ialakai's Reference Point (RP) is a granite block situated 1.222 m starboard of the ship's centerline, 1.23 m above the ship's baseline/datum on the keel. The RP is located under the forward deck, in the ship's laundry room. The ship's sensors, the sonar systems and permanent benchmarks are measured with respect to the RP. 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 survey waterline is defined to be at the 15' draft mark on the vessel's starboard side.
POS/MV Settings: X Y Z RP to IMU, m 0.434 0.000 -0.117 RP to Primary GPS(port),m -18.101 -2.011 -23.545 RP to Vessel, m 0.00 0.00 0.00 IMU w.r.t. Ref. Frame, deg 0.00 0.00 0.00 RP to Heave lever arm, m -14.532 -1.179 -5.234 Sensor 1 & 2 lever arms & angles: 0 0 0 Antenna Baseline Distance: 1.779
EM300 Settings: X Y Z Pos sensors 1 2 & 3, m 0 0 0 TX Transducer, m -04.091 -2.217 1.727 RX Transducer, m -06.065 -1.222 1.727 Attitude sensors 1 & 2, m 0 0 0 Waterline, m -3.26 Roll Pitch Heading TX Transducer, deg 0.00 0.00 359.96 RX Transducer, deg 0.00 0.00 0.05 Attitude 1, deg -0.20 0.00 0.00 Attitude 2, deg 0 0 0 Stand-alone heading, deg 0
Resource Description: EM300 and EM3002D Multibeam Sonar Data from Cruise Hi'ialakai HI-06-09
Data Format - Generic Sensor Format, as described in <http://www.ldeo.columbia.edu/res/pi/MB-System/formatdoc/gsf_spec.pdf>