CRED Acoustic Backscatter Tinian, Commonwealth of Northern Mariana Islands (CNMI) 2003, Imagery Extracted from Gridded Bathymetry

Metadata also available as [Questions & Answers] - [Parseable text] - [XML]

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator:
Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Publication_Date: 200508
Title:
CRED Acoustic Backscatter Tinian, Commonwealth of Northern Mariana Islands (CNMI) 2003, Imagery Extracted from Gridded Bathymetry
Geospatial_Data_Presentation_Form: raster digital data
Online_Linkage:
https://www.fisheries.noaa.gov/pacific-islands/ecosystems/surveying-vast-ocean
Description:
Abstract:
Backscatter extracted from gridded bathymetry of the banktops and shelf environments of the Tinian, of the Commonwealth of Northern Mariana Islands (CNMI).
Purpose:
This acoustic backscatter imagery was created using data gathered from multibeam soundings for use as a planning and reference document. Refer to supplemental information for description of instrument and survey.
Supplemental_Information:
Data were collected aboard the R/V AHI (Acoustic Habitat Investigator),a 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 providing bathymetry and imagery data, a TSS/Applanix POS/MV Model 320 which measures position, velocity, attitude and heading, and a Seabird SBE 19 CTD used to measure sound velocity profiles.

Equipment serial numbers and software versions are as follows:

RESON 8101-ER multibeam echosounder DOC inventory #: CD0000537418 Firmware, dry: 8101-2.07-2D4D Firmware, wet: 8101-1.06-2F6B

POS/MV Model 320, version 3 DOC inventory #: CD0000476647 PCS serial #: 474 IMU serial #: 203 Controller software: v 1.0.5.0

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: 20030823
Ending_Date: 20030912
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: 145.634128
East_Bounding_Coordinate: 145.703659
North_Bounding_Coordinate: 15.155683
South_Bounding_Coordinate: 14.887760
Keywords:
Theme:
Theme_Keyword_Thesaurus: NCEI Geoportal Filter
Theme_Keyword: CoRIS_Metadata
Theme:
Theme_Keyword_Thesaurus: CRCP Project
Theme_Keyword: Benthic Habitat Mapping and Characterization - CNMI and Guam
Theme_Keyword: 1398
Theme_Keyword: Benthic Habitat Mapping and Characterization - CNMI and Guam
Theme_Keyword: 1398-03
Theme:
Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
Theme_Keyword:
EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Water Depth
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Acoustic Imagery
Theme_Keyword: Sidescan
Theme_Keyword: AHI0304
Theme_Keyword: Backscatter
Theme:
Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
Theme_Keyword: Geographic Information > Backscatter
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: 014
Theme_Keyword: elevation
Theme_Keyword: 006
Place:
Place_Keyword_Thesaurus: CoRIS Place Thesaurus
Place_Keyword:
OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Mariana Archipelago > Northern Mariana Islands ( CNMI ) (18N146E0000)
Place_Keyword:
COUNTRY/TERRITORY > Northern Mariana Islands > Northern Mariana Islands > Northern Mariana Islands ( CNMI ) (18N146E0000)
Place_Keyword:
OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Tinian Island Reefs > Tinian Island (14N145E0005)
Place_Keyword:
COUNTRY/TERRITORY > Northern Mariana Islands > Tinian > Tinian Island (14N145E0005)
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Commonwealth of the Northern Mariana Islands
Place:
Place_Keyword_Thesaurus: CoRIS Region
Place_Keyword: CNMI
Access_Constraints: None
Use_Constraints:
These data are not to be used for navigation purposes. Please acknowledge the NOAA Coral Reef Ecosystem Division, Pacific Islands Fisheries Science Center as the source of this information.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Contact_Address:
Address_Type: mailing and physical address
Address: NOAA IRC
Address: NMFS/PIFSC/CRED
Address: 1845 WASP Blvd., Building 176
City: Honolulu
State_or_Province: HI
Postal_Code: 96818
Contact_Voice_Telephone: 808 725-5360
Contact_Facsimile_Telephone: 808 725-5429
Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
Contact_Instructions: e-mail preferred
Data_Set_Credit:
Pacific Islands Benthic Habitat Mapping Center, Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), NOAA
Security_Information:
Security_Classification_System: Not applicable
Security_Classification: Unclassified
Security_Handling_Description: Not applicable

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Data are collected for resource management and research purposes and are tested for internal consistency; however, no effort is made to compare these data to external references or to other published data.
Logical_Consistency_Report: Unspecified
Completeness_Report: Complete
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Horizontal positioning system: GPS SPS Horizontal position accuracy: 1.0 meters
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Range resolution of sonar: approximately 1.25 cm Raw sounding resolution: 1 cm Vertical accuracy of gridded product: approximately 1 meter
Lineage:
Process_Step:
Process_Description:
Science Applications International Corporation's (SAIC) ISS-2000 acquires, processes and records data, provides survey control and underway quality control displays. SAIC's SABER processing software is used to process the raw soundings, analyze the results, manually edit the sounding data to remove outliers and derive average gridded data values. The data have been corrected for observed tides from Guam tide gauge 1630000 with a time corrector of 18 minutes and a tide height multiplier of 0.94 using SABER postprocessing software. The data were also recorrected for observed sound velocities in postprocessing. Hawaii Mapping Research Group (HMRG) processing software was then used to extract values of acoustic intensity from the soundings. HMRG is an organization of scientists, engineers and technicians whose mission is to design, build, and operate tools for mapping the seafloor. HMRG is a group within the School of Ocean and Earth Science and Technology at the University of Hawaii at Manoa. The gsf2mr program (July, 2003) converts the swath bathymetry ping records contained within a GSF (Generic Sensor Format) version 2.02 dataset into mr1file format. This is done as follows: (i) position each beam's bottom detect intensity sample at the across-track location of that beam's bathymetry value; (ii) assuming a flat bottom in the near neighborhood of the beam, compute across-track distances for all of the beam's remaining intensity samples based on their temporal relation to the bottom detect sample and the computed average sound velocity for that beam as derived from its range and travel time; (iii) after all of the intensity samples from all beams of a ping have been located in across-track distance, fill the gaps between them as necessary by interpolation. The conversion described above is necessary in order to run HMRG backscatter processing operations on the data, such as filtering to remove noise, and to create netCDF grids, raster images and geotiffs. GMT was then used to reformat the acoustic imagery when necessary. Interactive Visualization System's Fledermaus, ESRI ArcGIS, and RSI ENVI were used for viewing results and creating browse objects. Software used: SAIC ISS-2000 Acquisition Software, v 3.4 (20030610) SAIC SABER Processing Software, v 2.0.2 (20030610) Hawaii Mapping Research Group (HMRG) Processing Software GMT Generic Mapping Tools, v 3.4.2 (20021002)
Process_Date: 20050512

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 6520
Column_Count: 7668
Vertical_Count: 1

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 55
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 9.9996
Longitude_of_Central_Meridian: 147
Latitude_of_Projection_Origin: 0
False_Easting: 500000
False_Northing: 0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Row and Column
Coordinate_Representation:
Abscissa_Resolution: 1
Ordinate_Resolution: 1
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: mean lower low water
Depth_Resolution: 0.01
Depth_Distance_Units: meters
Depth_Encoding_Method: Attribute Values

Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Sidescan data within a GSF file are arranged as small sequences of intensity values, one sequence per beam per ping. The intensity values represent the amplitude of echo returns to the sensor and can be related to seabed roughness.
Entity_and_Attribute_Detail_Citation: none

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Contact_Address:
Address_Type: mailing and physical address
Address: NOAA IRC
Address: NMFS/PIFSC/CRED
Address: 1845 WASP Blvd., Building 176
City: Honolulu
State_or_Province: HI
Postal_Code: 96818
Contact_Voice_Telephone: 808 725-5360
Contact_Facsimile_Telephone: 808 725-5429
Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
Contact_Instructions: e-mail preferred
Resource_Description: Downloadable Data
Distribution_Liability:
These data are not to be used for navigational purposes. NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA cannot assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: net CDF, Binary netCDF Grid
File_Decompression_Technique: unZIP
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: http://www.pifsc.noaa.gov/cred/hmapping/cnmi_backscatter.php
Network_Resource_Name: https://www.pifsc.noaa.gov/cred/hmapping/map_saipan.php
Access_Instructions:
These files are formatted as 2-D binary netCDF grid files. This is the default grid file format used by GMT (Generic Mapping Tools), which created this file. More information can be be located at http://gmt.soest.hawaii.edu and http://unidata.ucar.edu/packages/netcdf/index.html List of Tinian backscatter netCDF grid files: ahi0304-8-12.grd.zip ahi0304-8-13.grd.zip ahi0304-8-14.grd.zip ahi0304-8-15.grd.zip ahi0304-8-16.grd.zip ahi0304-8-17.grd.zip ahi0304-8-18.grd.zip
Digital_Form:
Digital_Transfer_Information:
Format_Name: GeoTIFF
File_Decompression_Technique: unZIP
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://www.pifsc.noaa.gov/cred/hmapping/cnmi_backscatter.php
Network_Resource_Name: https://www.pifsc.noaa.gov/cred/hmapping/map_saipan.php
Access_Instructions:
These files are formatted as 2-D binary GeoTIFF files. This is the default file used by GMT (Generic Mapping Tools), which created this file. More information can be located at http://gmt.soest.hawaii.edu and http://unidata.ucar.edu/packages/netcdf/index.html List of Tinian backscatter GeoTIFF files: ahi0304-8-12.zip ahi0304-8-13.zip ahi0304-8-14.zip ahi0304-8-15.zip ahi0304-8-16.zip ahi0304-8-17.zip ahi0304-8-18.zip
Fees: None

Metadata_Reference_Information:
Metadata_Date: 20190605
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
Pacific Islands Benthic Habitat Mapping Center (PIBHMC), Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Contact_Person: CRED Data Management Team
Contact_Address:
Address_Type: mailing and physical address
Address: NOAA IRC
Address: NMFS/PIFSC/CRED
Address: 1845 WASP Blvd., Building 176
City: Honolulu
State_or_Province: HI
Postal_Code: 96818
Contact_Voice_Telephone: 808 725-5360
Contact_Facsimile_Telephone: 808 725-5429
Contact_Electronic_Mail_Address: nmfs.pic.credinfo@noaa.gov
Contact_Instructions: e-mail preferred
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

CoRIS:
CoRIS_ID: 20070329011616
CoRIS_Children: None
CoRIS_Beginning_Date: 20030823
CoRIS_Ending_Date: 20030912
CoRIS_Metadata_Link:
https://www.coris.noaa.gov/metadata/records/html/cred_backscatter_tinian_2003.html
CoRIS_Tracking_ID: 1686

Generated by mp version 2.9.48 on Wed Mar 27 10:50:16 2024