Identification_Information: Citation: Citation_Information: Originator: Joyce E. Miller Publication_Date: 20060907 Title: Reson 8101ER Multibeam Sonar Data from Cruise OES-03-06/AHI-03-06, Data Set Name Midway. Geospatial_Data_Presentation_Form: Generic Sensor Format (GSF) digital data Online_Linkage: http://soest.hawaii.edu/pibhmc Description: Abstract: Reson 8101ER multibeam Data were collected between 29 July - 8 August 2003 (JD 210-220) aboard NOAA Survey Launch Acoustic Habitat Investigator (AHI) at Midway Islands in the Northwestern Hawaiian Islands in the north Pacific during cruise OES-03-06/AHI-03-06. The AHI was deployed independently from the NOAA Ship Oscar Elton Sette (OES). The multibeam data were logged into data set Midway and collected using SAIC ISS-2000 software in the Generic Sensor Format and processed using SABER editing software. Sound velocity corrections from a Seabird SBE19 CTD sensor and motion corrections from a POS-MV vertical reference were applied to the data in real time. Observed tides from Midway tide gauge (1619910) were applied using SABER postprocessing software. 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 10 - 300 m. These multibeam bathymetric data in generic sensor format from AHI0402 were submitted to NOAA's National Geophysical Data Center (NGDC) in Boulder, CO, for distribution in 2005. Purpose: The data were collected in support of Coral Reef Conservation Program goals to map all shallow (0-30 m)coral reefs in US Pacific waters and priority moderate (> 30 m) depth areas by 2009. The data are being used to provide bathymetric and backscatter data for previously unmapped areas; in support of ecosystem management requirements for benthic habitat mapping and location of Essential Fish Habitat; and to study the geologic features of the area. Supplemental_Information: Data were collected aboard the R/V AHI (Acoustic Habitat Investigator), a 8 m (25’) survey launch owned and operated by the NOAA Pacific Islands Fisheries Science Center in Honolulu, HI. The R/V AHI’s survey sensors include a 240 kHz RESON 8101-ER sonar which measures bathymetry and acoustic backscatter imagery, a TSS/Applanix POS/MV Model 320 which measures time, position, velocity, attitude and heading, and a Seabird SBE 19 CTD used to measure sound velocity profiles. The AHI's equipment serial numbers, software versions and sensor configuration settings are as follows: RESON 8101-ER multibeam echosounder DOC inventory #: CD0000537418 Transducer serial #: 201004 Firmware, dry: 8101-2.07-2D4D Firmware, wet: 8101-1.06-2F6B R/V AHI POS/MV Model 320, version 3 DOC inventory #: CD0000476647 PCS serial #: 474 IMU serial #: 203 Controller software: v 1.0.5.0 PCS Firmware: 2.16 Seabird SBE19 CTD: Serial #: 3029 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. Antenna Baseline Distance, m: 1.229 Transducer depth below waterline, m 0.62 RP to IMU 0.80 0.00 0.08 RP to Primary GPS Antenna -3.55 -0.61 -1.88 RP to Vessel 0.16 0.00 0.77 RP to Sensor 1(MB transducer) 0.16 0.00 0.77 RP to Sensor 2 0 0 0 RP to Aux. GPS Antenna 0 0 0 RP to Heave lever arm(deg) -0.67 0.00 0.00 IMU rotation Ref. Frame, deg 0 0 0 Sensor 1 rotation Ref. Frame, deg 0 0 0 Sensor 2 rotation Ref. Frame, deg 0 0 0 Roll offset: +0.5 deg Pitch offset: 0.0 deg Gyro offset: 0.0 deg Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20030729 Ending_Date: 20030808 Currentness_Reference: ground condition Status: Progress: In Work Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -177.503335 East_Bounding_Coordinate: -177.251627 North_Bounding_Coordinate: 28.346451 South_Bounding_Coordinate: 28.151728 Keywords: Theme: Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus Version 1.0 Theme_Keyword: EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Bathymetry Theme_Keyword: Multibeam sonar Place: Place_Keyword_Thesaurus: None Place_Keyword: Midway Island Place_Keyword: Northwestern Hawaiian Islands Place_Keyword: Islands Place: Place_Keyword_Thesaurus: CoRIS Place Thesaurus Version 1.0 Place_Keyword: OCEAN BASIN > Pacific Ocean > North Pacific Ocean > Northwestern Hawaiian Islands > Midway > Islands Place_Keyword: COUNTRY > United States of America > Hawaii > Honolulu Access_Constraints: None. Use_Constraints: These data are NOT TO BE USED FOR NAVIGATION. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Joyce E. Miller Contact_Organization: Coral Reef Ecosystem Division, Pacific Islands Fisheries Science Center Contact_Position: Oceanographer Contact_Address: Address_Type: mailing and physical address Address: Kewalo Research Facility, 1125B Ala Moana Blvd City: Honolulu State_or_Province: Hawaii Postal_Code: 96814 Country: USA Contact_Voice_Telephone: (808) 956-5239 Contact_Facsimile_Telephone: (808) 983-3730 Contact_Electronic_Mail_Address: Joyce.Miller@noaa.gov Data_Set_Credit: Joyce E. Miller Coral Reef Ecosystem Division, NOAA Pacific Islands Fisheries Science Center Native_Data_Set_Environment: Generic Sensor Format multibeam data processed with SAIC SABER processing software on LINUX operating system computers Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Horizontal accuracy is ~20 m as data were collected using GPS with no differential corrections. Vertical accuracy of multibeam data is estimated at 1% of water depth; predicted tidal corrections were applied. Logical_Consistency_Report: These data are believed to be logically consistent though no tests were performed Completeness_Report: Varies Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Variable Quantitative_Horizontal_Positional_Accuracy_Assessment: Horizontal_Positional_Accuracy_Value: 20 Horizontal_Positional_Accuracy_Explanation: Multibeam sonar data. No DGPS corrections applied; 20 m accuracy Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Variable Quantitative_Vertical_Positional_Accuracy_Assessment: Vertical_Positional_Accuracy_Value: 1 Vertical_Positional_Accuracy_Explanation: Accuracy varies with water depth. Observed tide correctors from Midway tide station 1619910 applied; multibeam data vertical accuracy is ~1% of water depth. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Joyce E. Miller, Coral Reef Ecosystem Division, NOAA Pacific Islands Fisheries Science Center Publication_Date: 20060907 Title: Reson 8101ER multibeam bathymetric data Type_of_Source_Media: Digital data Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2003 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Reson 8101ER Source_Contribution: Reson 8101ER (240 kHz) bathymetry and imagery data were collected in depths of ~10-250 m. Process Step: Process Description: Generic Sensor Format multibeam data were processed with SAIC SABER processing software and converted to gridded bathymetry products. See product metadata for detailed processing steps. Process Date: 20030808 Metadata_Reference_Information: Metadata_Date: 20060907 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Coral Reef Ecosystem Division, NOAA Pacific Islands Fisheries Science Center Contact_Person: Joyce E. Miller Contact_Address: Address_Type: Kewalo Research Facility, 1125B Ala Moana Blvd City: Honolulu State_or_Province: Hawaii Postal_Code: 96814 Contact_Voice_Telephone: (808) 956-5239 Contact_Facsimile_Telephone: (808) 983-3730 Contact_Electronic_Mail_Address: Joyce.Miller@noaa.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: Universal Time Metadata_Access_Constraints: None Metadata_Use_Constraints: None