2006 EM300 and EM3002D Multibeam Sonar Data from Cruise Hi'ialakai HI-06-01 - Pacific Remote Island Areas

EM300 and EM3002D multibeam Data were collected from 15 Jan - 6 Feb 2006 aboard NOAA Ship Hi'ialakai at Johnston Island, Howland Island, and Baker Island in the Central Pacific during cruise HI-06-01 These multibeam data were collected using SAIC ISS-2000 software in the Generic Sensor Format and processed using SABER editing software. Surface sound velocity values were supplied by a Seabird SBE-45 MicroTSG and a SBE-38 remote temperature probe. Sound velocity corrections from a Seabird 911 CTD sensor and motion corrections from a POS-MV vertical reference were applied to the data in real time. Predicted tides were applied to the data in real time: for Johnston Island predicted tides from the NOS CO-OPS web site were used; for Baker and Howland Islands predicted tides based upon the Honolulu tide station (1612340) with a time corrector of 3 hrs 48 min and a range ratio of 3.91. 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 ~20 - 4720 m. Concurrent mapping was done by the R/V AHI in water depths ranging from 3-250 m with the data set being AHI-06-01; metadata for AHI-06-01 are submitted separately.