Short Citation:
Pacific Islands Fisheries Science Center, 2021: EM300 Multibeam Sonar Data collected from January 26 to April 22 from NOAA Ship Hi'ialakai cruise HA-15-01 to the Pacific Remote Island Areas and American Samoa in 2015, https://www.fisheries.noaa.gov/inport/item/47822.

Item Identification

Title: EM300 Multibeam Sonar Data collected from January 26 to April 22 from NOAA Ship Hi'ialakai cruise HA-15-01 to the Pacific Remote Island Areas and American Samoa in 2015
Short Name: Multibeam Data, Cruise HA-15-01
Status: Completed
Publication Date: 2018
Abstract:

Multibeam data were collected using a Simrad EM300 30-kHz sonar aboard NOAA Ship Hi'ialakai, a 68-m (218') NOAA research vessel, from January 26 to April 22, 2015 during cruise HA-15-01. Multibeam data were acquired at Johnston, Howland, Baker, Jarvis, and Palmyra in the Pacific Remote Island Areas, and Swains and Tutuila in American Samoa. The multibeam data were collected using Kongsberg SIS software in the *.all format and processed using SABER and QPS Qimera editing software. Surface sound velocity values were supplied by Seabird SBE-45 MicroTSG and a SBE-38, and motion corrections from a TSS/Applanix POS MV (Model 320 Version 4) vertical reference were applied to the data in real time. WGS84 datum. The vessel is equipped with a sound velocity profiler; however, no casts were acquired during mapping operations. Attempts were made to improve vertical fit of the EM300 data by using sound velocity profile data from other sources (data from previous cruises, and synthetic data derived from World Ocean Atlas using velocipy); however, these alternatives were not effective. Resulting vertical discrepancies with pre-existing surfaces are ±10m; however, the EM300 data cover deep depths (up to 4800m) and therefore these errors were considered acceptable. The EM300 data only covered new terrain around Howland and Baker islands, and therefore only the data for these areas have been processed. Depths mapped range from ~50 m to 4800 m. These data are not to be used for navigation.

Purpose:

The Pacific Islands Deep-Sea Coral and Sponge Initiative (PICSI) aimed to map and characterize deep-sea coral and sponge ecosystems of the Pacific Marine National Monuments in select areas of the U.S. Pacific Islands through systematic field surveys that utilize bathymetry and other seascape features to prioritize survey locations. Data collected by the NOAA Ecosystem Sciences Division (ESD) in 2015 was intended to gap-fill pre-existing bathymetry coverage around the U.S. Pacific Islands visited during ESD's Pacific Reef Assessment and Monitoring Program cruise to the Pacific Remote Island Areas and American Samoa.

Supplemental Information:

The Hi'ialakai's survey sensors include a 30 kHz Simrad EM300 sonar and a 300 kHz Simrad EM3002d sonar, which measure bathymetry and acoustic backscatter imagery. However, as a result of concerns associated with the EM3002d sonar and deviations from data acquisition protocols (e.g., no sound velocity profiles), and considering the newly acquired data only covered areas previously surveyed, the data acquired with the EM3002d sonar will not be archived.

Keywords

Theme Keywords

Thesaurus Keyword
CoRIS Discovery Thesaurus Geographic Information > Bathymetry
CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Aquatic Habitat > Benthic Habitat
CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat
CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping
CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry
CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs
ISO 19115 Topic Category 006
ISO 19115 Topic Category 014
ISO 19115 Topic Category elevation
ISO 19115 Topic Category Oceans
NODC DATA TYPES THESAURUS BATHYMETRY
NODC OBSERVATION TYPES THESAURUS Geophysical
NODC PLATFORM NAMES THESAURUS HI'IALAKAI
NODC SUBMITTING INSTITUTION NAMES THESAURUS US DOC; NOAA; NMFS; Pacific Islands Fisheries Science Center; Ecosystem Sciences Division; Coral Reef Ecosystem Program
None Coral Reef Ecosystem Division
None Coral Reef Ecosystem Program
None CRED
None CREP
None Ecosystem Sciences Division
None ESD
None Multibeam sonar
None Pacific Islands Benthic Habitat Mapping Center
None Pacific Islands Fisheries Science Center
None PIBHMC
None PIFSC
None seafloor elevation

Spatial Keywords

Thesaurus Keyword
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > American Samoa (14S170W0000)
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Swains Atoll (11S171W0001)
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > American Samoa > American Samoa > Tutuila Island (14S170W0016)
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Baker Island (00N176W0001)
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Howland Island (00S176W0001)
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Jarvis Island (00S160W0001)
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Johnston Atoll (16N169W0001)
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > USA Minor Outlying Islands > Palmyra Atoll (05N162W0001)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > American Samoa > American Samoa (14S170W0000)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > American Samoa > Swains Atoll (11S171W0001)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > American Samoa > Tutuila Island (14S170W0016)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Baker Island > Baker Island (00N176W0001)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Howland Island > Howland Island (00S176W0001)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Johnston Atoll > Johnston Atoll (16N169W0001)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Line Islands > Jarvis Island (00S160W0001)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Line Islands > Palmyra Atoll (05N162W0001)
NODC SEA AREA NAMES THESAURUS Equatorial Pacific Ocean
NODC SEA AREA NAMES THESAURUS Pacific Remote Islands Marine National Monument
NODC SEA AREA NAMES THESAURUS South Pacific Ocean
None Pacific Remote Island Areas
None PRIA

Stratum Keywords

Thesaurus Keyword
Global Change Master Directory SEA FLOOR

Physical Location

Organization: Pacific Islands Fisheries Science Center
City: Honolulu
State/Province: HI
Country: USA

Data Set Information

Data Set Scope Code: Data Set
Data Set Type: Sensor files and rasters
Maintenance Frequency: None Planned
Data Presentation Form: Map (digital)
Entity Attribute Overview:

EM300 Multibeam Sonar Data from NOAA Ship Hi'ialakai Cruise HA-15-01 in *.all (raw) and *.GSF (processed) file formats. All raw data collected during the cruise are included in the archive, only data for Howland and Baker islands have been processed and developed into raster products (*.TIF). Depth values are in meters.

Entity Attribute Detail URL: https://www.fisheries.noaa.gov/inport/item/51445
Distribution Liability:

While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

Data Set Credit: PIFSC Ecosystem Sciences Division

Support Roles

Data Steward

CC ID: 598466
Date Effective From: 2015
Date Effective To:
Contact (Person): Lichowski, Frances
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: frances.lichowski@noaa.gov
Phone: (808)725-5476

Distributor

CC ID: 694572
Date Effective From: 2018
Date Effective To:
Contact (Organization): National Centers For Environmental Information (Boulder) (NCEI-Boulder)
Address: E/GC 325 Broadway
Boulder, CO 80305-3328
Phone: 303-497-6826
URL: https://www.ngdc.noaa.gov/

Distributor

CC ID: 598467
Date Effective From: 2015
Date Effective To: 2018
Contact (Person): Lichowski, Frances
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: frances.lichowski@noaa.gov
Phone: (808)725-5476

Metadata Contact

CC ID: 598468
Date Effective From: 2015
Date Effective To:
Contact (Person): DesRochers, Annette M
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: annette.desrochers@noaa.gov
Phone: (808)725-5461
Business Hours: 8 am - 5 pm

Originator

CC ID: 598469
Date Effective From: 2015
Date Effective To:
Contact (Organization): Pacific Islands Fisheries Science Center (PIFSC)
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Phone: 808-725-5300
URL: http://www.pifsc.noaa.gov
Business Hours: 8:00 a.m. - 4:30 p.m.

Point of Contact

CC ID: 598470
Date Effective From: 2015
Date Effective To:
Contact (Person): DesRochers, Annette M
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: annette.desrochers@noaa.gov
Phone: (808)725-5461
Business Hours: 8 am - 5 pm

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Description:

Johnston, Howland, Baker, Jarvis and Palmyra of the Pacific Remote Islands Marine National Monument, and Tutuila and Swains in American Samoa.

Extent Group 1 / Geographic Area 1

CC ID: 598742
W° Bound: -160.103271
E° Bound: -159.889573
N° Bound: -0.285209
S° Bound: -0.468865
Description

Jarvis

Extent Group 1 / Geographic Area 2

CC ID: 598743
W° Bound: -169.695029
E° Bound: -169.270211
N° Bound: 16.883694
S° Bound: 16.572987
Description

Johnston

Extent Group 1 / Geographic Area 3

CC ID: 598744
W° Bound: -162.357356
E° Bound: -161.916751
N° Bound: 6.040206
S° Bound: 5.772677
Description

Palmyra

Extent Group 1 / Geographic Area 4

CC ID: 598463
W° Bound: -176.737566
E° Bound: -176.56212
N° Bound: 0.867447
S° Bound: 0.741496
Description

Howland

Extent Group 1 / Geographic Area 5

CC ID: 598464
W° Bound: -176.618246
E° Bound: -176.368775
N° Bound: 0.300726
S° Bound: 0.068394
Description

Baker

Extent Group 1 / Geographic Area 6

CC ID: 598745
W° Bound: -170.928197
E° Bound: -170.484814
N° Bound: -14.195351
S° Bound: -14.384053
Description

Tutuila

Extent Group 1 / Geographic Area 7

CC ID: 598746
W° Bound: -171.21861111111
E° Bound: -170.94055555556
N° Bound: -10.934991
S° Bound: -11.188662
Description

Swains

Extent Group 1 / Time Frame 1

CC ID: 598462
Time Frame Type: Range
Start: 2015-01-26
End: 2015-04-22
Description:

Dates multibeam data were collected during NOAA Ship Hi'ialakai mission HA-15-01.

Access Information

Security Class: Unclassified
Security Classification System:

Not applicable

Security Handling Description:

Not applicable

Data Access Policy:

NOAA Coral Reef Ecosystem Program (CREP) Data Sharing Recommendations, version 9.0 updated August 12, 2015:

CREP welcomes the opportunity to collaborate on research issues contributing to the scientific basis for better management of marine ecosystems. CREP has a very diverse set of field activities that generates large volumes of data using an array of data collection protocols.

The following recommendations are for your consideration as you use this data:

1) Data analyses should take all field exigencies into account. The most effective way to do this would be active collaboration with CREP principal investigators.

2) In all presentations, product releases, or publications using data generated by CREP, proper acknowledgement of both CREP and the individuals responsible for data collection is expected. Citing the DOI (if available) is preferred, a non-DOI example is listed below.

3) If you collect or generate data for the same study areas, CREP requests that you share relevant information on complimentary data collections.

4) Those receiving data are strongly urged to inform the CREP Data Management Team of any errors and discrepancies that are discovered during the course of using these data. They are further urged to bring to the attention of the Team all problems and difficulties encountered in using these data. This information is necessary in order to improve the collections and to facilitate more efficient and economical data processing and retrieval. The users are asked to supply copies of any missing data that may be located, and to provide information as to significant subsets and special aggregations of data that are developed in using the material provided.

Example citation:

"This publication makes use of data products provided by the Ecosystem Sciences Division, Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), with funding support from the NOAA Coral Reef Conservation Program (CRCP) and the Pacific Islands Deep Sea Coral and Sponge Initiative. The analysis and interpretations presented here are solely that of the current authors.”

Data Access Procedure:

Data can be accessed online via the NOAA National Centers for Environmental Information (NCEI) Bathymetry Archive.

Data Access Constraints:

none

Data Use Constraints:

Please cite NOAA Ecosystem Sciences Division (ESD) when using the data.

Suggested citation:

Ecosystem Sciences Division; Pacific Islands Fisheries Science Center (2018). EM300 Multibeam Sonar Data collected from January 26 to April 22 from NOAA Ship Hi'ialakai cruise HA-15-01 to the Pacific Remote Island Areas and American Samoa in 2015. NOAA's National Center for Environmental Information, https://www.fisheries.noaa.gov/inport/item/47822.

Metadata Access Constraints:

None

Metadata Use Constraints:

None

Distribution Information

Distribution 1

CC ID: 715286
Download URL: https://www.ngdc.noaa.gov/ships/hi_ialakai/HA1501_mb.html
Distributor: National Centers For Environmental Information (Boulder) (NCEI-Boulder) (2018 - Present)
File Name: *.all
Description:

Version1 data are the raw (as collected) multibeam files (*.all) acquired during cruise HA-15-01 aboard the Hi'ialakai from Jan 26 to April 22 2015 around Johnston, Howland, Baker, Jarvis, and Palmyra in the Pacific Remote Island Areas, and Swains and Tutuila in American Samoa.

*Data are currently in the process of being archived and will be accessible via NCEI's Bathymetry portal once complete.

File Type: ALL (Kongsberg SIS software)

Distribution 2

CC ID: 715287
Download URL: https://www.ngdc.noaa.gov/ships/hi_ialakai/HA1501_mb.html
Distributor: National Centers For Environmental Information (Boulder) (NCEI-Boulder) (2018 - Present)
File Name: *.gsf
Description:

Version2 data are the processed multibeam files (*.gsf) acquired during cruise HA-15-01 aboard the Hi'ialakai for Howland and Baker islands in the Pacific Remote Island Areas.

*Data are currently in the process of being archived and will be accessible via NCEI's Bathymetry portal once complete.

File Type: GSF (generic sensor format)

Distribution 3

CC ID: 598472
Download URL: https://www.ngdc.noaa.gov/ships/hi_ialakai/HA1501_mb.html
Distributor: National Centers For Environmental Information (Boulder) (NCEI-Boulder) (2018 - Present)
File Name: Baker_1501_EM300_40m.tif
Description:

Multibeam bathymetry grid for Baker Island, acquired during NOAA Ship Hi'ialakai cruise HA-15-01.

*Data are currently in the process of being archived and will be accessible via NCEI's Bathymetry portal once complete.

File Date/Time: 2017-09-28 00:00:00
File Type: GeoTIFF

Distribution 4

CC ID: 598471
Download URL: https://www.ngdc.noaa.gov/ships/hi_ialakai/HA1501_mb.html
Distributor: National Centers For Environmental Information (Boulder) (NCEI-Boulder) (2018 - Present)
File Name: Combined_RAMP_MBES-report_11092017.pdf
Description:

The report describes processing of multibeam echosounder (MBES) bathymetry data acquired aboard the Hi'ialakai during NOAA RAMP cruises between 2015 and 2017. Report also discusses data quality and coverage issues that impacted which data were archived to the NOAA National Centers for Environmental Information (NCEI) and used to update bathymetric products produced by the NOAA Ecosystem Sciences Division, and available on the Pacific Islands Benthic Habitat Mapping Center website (https://www.soest.hawaii.edu/pibhmc/cms/).

"Multibeam bathymetry data from 2015-2017 RAMP cruises (ASRAMP; HARAMP; MARAMP)"

*Data and reports are currently in the process of being archived and will be accessible via NCEI's Bathymetry portal once complete.

File Date/Time: 2017-11-09 00:00:00
File Type: PDF

Distribution 5

CC ID: 598740
Download URL: https://www.ngdc.noaa.gov/ships/hi_ialakai/HA1501_mb.html
Distributor: National Centers For Environmental Information (Boulder) (NCEI-Boulder) (2018 - Present)
File Name: Howland_EM300_post_draft_40m_clean.tif
Description:

Multibeam bathymetry grid for Howland Island, acquired during NOAA Ship Hi'ialakai cruise HA-15-01.

*Data are currently in the process of being archived and will be accessible via NCEI's Bathymetry portal once complete.

File Date/Time: 2017-09-27 00:00:00
File Type: GeoTIFF

URLs

URL 1

CC ID: 694579
URL: https://www.ngdc.noaa.gov/mgg/bathymetry/multibeam.html
Name: NCEI Multibeam Bathymetry Archive
URL Type:
Online Resource
Description:

NCEI is the U.S. national archive for multibeam bathymetric data. Data access includes, 1) Bathymetric Data Viewer (geographic and text search), 2) Multibeam Survey Search (text search), and 3) Custom Maps using AutoGrid tool.

URL 2

CC ID: 694580
URL: http://www.soest.hawaii.edu/pibhmc
Name: Pacific Islands Benthic Habitat Mapping Center website
URL Type:
Online Resource

URL 3

CC ID: 715288
URL: https://www.pifsc.noaa.gov/cred/
Name: Coral Reef Ecosystem Program website
URL Type:
Online Resource

Technical Environment

Description:

Bathymetry data acquired using Kongsberg SIS (*all format). Post-processing conducted in SABER and QPS Qimera. Where data are of sufficient coverage and quality (Howland and Baker islands), data archived as processed *gsf.

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:

PU: 2.0.0 040330

DDS: ***

BSP: 2.3.1 040131

SPRX: 1.1.3 040427

SPTX: 1.1.4 001016

SIS Software Version: 3.2.2, build 54, Sept 7 2006

~~~~~~~~~~

SIMRAD EM3002D multibeam echosounders

Serial #: 357 and 353

PU Software Versions:

HCT: 2.0.7 040906

BSP67 Master: 1.3.1 060113

BSP67 Slave: 1.3.1 060113

PU: 1.8.7 060831

DDS: 3.18 2005/11/24

SIS Software Version: 3.2.2, build 54, Sept 7 2006

~~~~~~~~~~

HI'IALAKAI POS/MV Model 320, version 4.000000

PCS serial #: 2484.000000

IMU serial #: 1333

PCS Firmware: 2.900000

Controller software: v 3.410000

~~~~~~~~~~

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:

RP to IMU, m X= 0.434 Y= 0.0 Z= -0.117

RP to Primary POS Antenna X= -1.532 Y= -2.874 Z= -22.267

POS GAMS Baseline X= -0.11 Y= 3.096 Z= -0.001

~~~~~~~~~~

EM300 Settings: X Y Z

Pos sensors 1 2 & 3, m 0 0 0

TX Transducer, m -4.09 -2.22 1.73

RX Transducer, m -6.07 -1.22 1.73

Attitude sensors 1 & 2, m 0 0 0

Waterline, m -3.25

-----Roll Pitch Heading

TX Transducer, deg 0.00 0.00 0.00

RX Transducer, deg 0.00 0.00 0.00

Attitude 1, deg -0.11 0.00 0.00

Attitude 2, deg 0 0 0

Stand-alone heading, deg 0

~~~~~~~~~~

EM3002D Settings:

Pos sensors 1 2 & 3, m 0 0 0

Sonar head 1 (port), m 4.44 -1.48 1.56

Sonar head 2 (stbd), m 4.44 -0.96 1.56

Attitude sensors 1 & 2, m 0 0 0

Waterline, m -3.26

Depth sensor, m 0 0 0

-----Roll Pitch Heading

Sonar head 1 (port), deg 39.83 0.97 0.43

Sonar head 2 (stbd), deg -39.62 1.13 358.56

Attitude 1, deg 0.00 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 HA-15-01

Data Quality

Accuracy:

Horizontal_Positional_Accuracy_Value: 20 (no DGPS corrections applied)

Vertical_Positional_Accuracy_Value: Vertical accuracy is depth dependent (~0.5% of water depth).

Completeness Report:

As a result of concerns associated with the EM3002d sonar and deviations from data acquisition protocols (e.g., no sound velocity profiles), and considering the newly acquired data only covered areas previously surveyed, the data acquired with the EM3002d have not been archived. All raw EM300 data were archived; however, EM300 data only covered new terrain around Howland and Baker islands, and therefore only the data for these areas have been processed and incorporated into map products.

Conceptual Consistency:

These data are believed to be logically consistent though no tests were performed

Quality Control Procedures Employed:

- Surface sound velocity values were supplied by Seabird SBE-45 MicroTSG and a SBE-38, and motion corrections from a TSS/Applanix POS MV (Model 320 Version 4) vertical reference were applied to the data in real time.

- Spurious data points were removed (automated and manual)

- Comparisons with previously acquired, overlapping data

Data Management

Have Resources for Management of these Data Been Identified?: Yes
Approximate Percentage of Budget for these Data Devoted to Data Management: Unknown
Do these Data Comply with the Data Access Directive?: Yes
Is Access to the Data Limited Based on an Approved Waiver?: No
Approximate Delay Between Data Collection and Dissemination: Unknown
Actual or Planned Long-Term Data Archive Location: NCEI-CO
Approximate Delay Between Data Collection and Archiving: Unknown
How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?:

NOAA IRC and NOAA Fisheries ITS resources and assets.

Lineage

Lineage Statement:

Multibeam data processing procedures.

Process Steps

Process Step 1

CC ID: 598477
Description:

-Raw data were acquired with Kongsberg SIS (*all)

-*all data were converted to *gsf within SABER processing software

-Vessel offset corrections were applied in SABER

-Corrected *gsf files were imported into QPS Qimera for editing and surface production

-Where data were of sufficient coverage and quality, a medium-tension spline filter was used to remove spurious data, and further manual editing was conducted to remove any remaining noise.

-Final surface grids were exported from Qimera to GeoTiff.

Process Date/Time: 2017-11-09 00:00:00

Acquisition Information

Instruments

Instrument 1

CC ID: 715226
Identifier: Kongsberg EM300
Docucomp UUID: 0571007e-297c-430c-a9d2-b56a3f225f99
Instrument / Gear: Instrument
Instrument Type: Multibeam Echosounder
Description:

The EM 300 multibeam echo sounder is designed to do mapping from 10 m depth to beyond the continental rises, including the shallower ocean basins. It operates down to more than 5000 m depth with swath widths up to about 5000 m. Small transducers and compact electronics make the installation easy, and the system accuracy is generally well within the IHO standards. The EM 300 is a complete system. All necessary sensor interfaces, data displays for quality control and sensor calibration, seabed visualization, and data logging are a standard part of the system, as is integrated seabed acoustical imaging capability (sidescan). The nominal sonar frequency is 30 kHz with an angular coverage sector of up to 150 degrees and 135 beams per ping as narrow as 1 degree. Achievable swath width on a flat bottom will normally be up to 5.5 times the water depth. The angular coverage sector and beam pointing angles may be set to vary automatically with depth according to achievable coverage. This maximizes the number of usable beams. The beam spacing is normally equidistant with equiangle available. The EM 300 multibeam system was in production from 1997 to 2007 and was replaced with the EM 302.

Platforms

Platform 1

CC ID: 715268
Identifier: NOAA Ship Hi‘ialakai
Description:

NOAA Ship Hi‘ialakai is a multipurpose oceanographic research vessel whose primary missions include coral reef ecosystem mapping, coral reef health and fish stock studies, and maritime heritage surveys in the Pacific Islands Region. A T-AGOS class vessel, Hi‘ialakai was built in 1984 for the U.S. Navy and served as the U.S. Naval Vessel Vindicator. The ship was then transferred to the U.S. Coast Guard, and finally to NOAA in 2002, when it was converted to conduct coral reef research. The ship was commissioned in the NOAA fleet in 2004.

The 224-ft. ship is renowned for its work since 2004 assessing the health of coral reefs throughout the Pacific Islands. Scuba diving operations play a major role in the ship’s mission, and Hi‘ialakai is equipped for both shallow- and deep-water dive projects. The ship carries three small workboats that transfer divers to the working grounds, a 15-person dive locker to store scientific gear and equipment, and an air compressor to fill tanks. As Hi‘ialakai frequently operates in remote areas, the ship also carries a three-person, double-lock decompression chamber. In the event of a diving accident, the diver can be treated onsite.

The ship supports a scientific crew of ~22 and is equipped with wet and dry labs, a computer/electronics room, and a scientific freezer. Data collection systems include an acoustic current Doppler profiler, CTDs and water samples, a thermosalinograph, and two Kongsberg multibeam echosounders (EM300 and EM3002d). The ship supported multibeam mapping operations across the Pacific Island Regions primarily between 2004 and 2008.

In addition to supporting NOAA projects, Hi‘ialakai works in partnership with the University of Hawaii, State of Hawaii, and the U.S. Fish and Wildlife Service. The ship is homeported at the NOAA Marine Operations Center-Pacific Islands in Honolulu.

Mounted Instrument 1

Identifier: Kongsberg EM300

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity (ENT) Multibeam_Bathymetry_Products

Related Items

Item Type Relationship Type Title
Data Set (DS) Series EM300 Multibeam Sonar Data collected from May 7 to May 22 from NOAA Ship Hi'ialakai cruise HA-17-01 to the Commonwealth of Northern Mariana Islands (CNMI) and Guam in 2017

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This is a product generated from the source multibeam data

Data Set (DS) Series PARR OBSOLETE: EM300 and EM3002D Multibeam Sonar Data from NOAA Ship Hi'ialakai cruise HA-16-06 to the Northwestern Hawaiian Islands in 2016

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Catalog Details

Catalog Item ID: 47822
Metadata Record Created By: Dayton W Dove
Metadata Record Created: 2017-11-08 22:34+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2020-08-03 16:13+0000
Metadata Record Published: 2018-02-01
Owner Org: PIFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2019-02-02