gov.noaa.ngdc.mgg.multibeam:EX1703_Multibeam
eng; USA
utf8
EX1703
series
multibeam series-level metadata
2017-05
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Multibeam Collection for EX1703: Howland/Baker PRIMNM and PIPA (ROV/Mapping)
EX-17-03
EX1703
2017-05
publication
EX1703_Multibeam
Multibeam raw (level-0) files (.raw), post-processed (level-1) Generic Sensor Format data files store post-processed multibeam data before processing into either vector or raster form (.gsf), data products (level-2) (.asc, .kmz, .sd, .tif, .xyz) generated during post-processing, as well as the spreadsheet the processors used to annotate their processing steps (.xls).
To collect, quality-control, and post-process multibeam bathymetric data during the mission into clean, edited data and data products.
completed
unknown
OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY
theme
multibeam
theme
None
Tokelau
Kiribati
Phoenix Islands
Howland and Baker Unit
Pacific Remote Islands Marine National Monument
PRIMNM
American Samoa
Apia, Samoa
Central Pacific Seamounts
place
None
otherRestrictions
otherRestrictions
Data use shall be credited to NOAA Office of Ocean Exploration and Research. All data and information collected inside the boundaries of the National Marine Sanctuary of American Samoa (excluding the Mulavia Unit) was collected under Permit Number NMSAS-2017-001. Any scientific publications and/or reports resulting from activities conducted under the authority of this permit must include the notation that the activity was conducted under permit number NMSAS-2017-001. Sanctuary boundaries can be found in Federal Regulations NMS Title 15 Part 922 - National Marine Sanctuary Program Regulations. http://www.ecfr.gov/cgi-bin/text-idx?SID=2f58dccc23c5841493e7188b34dac338&mc=true&node=sp15.3.922.j&rgn=div6. No data access constraints, unless data are protected under the National Historic Preservation Act of 1966. Data use shall be credited to NOAA Office of Ocean Exploration and Research. No data access constraints, unless data are protected under the National Historic Preservation Act of 1966.
EX1703: Howland/Baker PRIMNM and PIPA (ROV/Mapping) on NOAA Ship Okeanos Explorer between 20170307 and 20170329
2017-05
creation
http://www.ncddc.noaa.gov/oer-waf/ISO/Resolved/2017/EX1703_COLLECTION_RESOLVED.xml
EX1703
largerWorkCitation
collection
eng; USA
oceans
geoscientificInformation
-177.91
-169.09
-12.22
1.57
2017-03-07
2017-03-29
distributor
http://maps.ngdc.noaa.gov/viewers/multibeam/index.html?minx=-177.91&miny=-12.22&maxx=-169.09&maxy=1.57
http://www.ngdc.noaa.gov/nndc/struts/results?op_0=eq&v_0=EX1703&t=101378&s=8&d=70&d=75&d=76&d=74&d=73&d=72&d=81&d=82&d=85&d=86&d=79&no_data=suppress
http://www.ngdc.noaa.gov/nndc/struts/results?op_0=l&v_0=&op_1=l&v_1=&op_2=l&v_2=EX1703&t=101378&s=2&d=6
The full-resolution multibeam .all files (Level-0 data) were imported into QPS Qimera software version 1.4.2, and then processed and cleaned of artifacts. Each cleaned line was exported to a .gsf, https://www.leidos.com/maritime/gsf, (Level-1 data). The processed and cleaned files were used to create a dynamic surface in Qimera 1.4.2, which was then exported to an ASCII XYZ text file. That ASCII XYZ file was used to generate a shaded relief DTM (SD file) in QPS, Inc. Fledermaus v7.6.3 software, which was then used to create Geotiff files, ArcView Grids, Google Earth KMZ files and Fledermaus Scene files (.sd) (Level-2 data). The data are believed to be complete in accordance with the ship's multibeam data acquisition and processing logs.
These files were tested by opening in Google Earth Pro to ensure that geospatial content of the files is not corrupted and is consistent with the Level 0 data.
The bathymetry data were generated using a Kongsberg EM302 multibeam system, and recorded using Kongsberg's Seafloor Information System (SIS) software as *.all files. Co-located to the bathymetric data, bottom backscatter data were collected and stored within *.all files, both as beam averaged backscatter values, and as full time series values within each beam. Realtime corrections to the data include: continuous application of surface sound speed obtained with a hull-mounted SBE 45 thermosalinograph, application of sound speed profiles obtained with Sippican Deep Blue Expendable Bathythermographs (XBTs) and / or Seabird CTD 9/11, application of roll, pitch, and heave motion corrections obtained with POS M/V V.5 motion sensor unit. Each raw multibeam file was imported into QPS Qimera software version 1.4.2, and cleaned of artifacts in Swath Editor. The files were then added to a cumulative gridded Dynamic Surface within CARIS, and further cleaned of errant depth values using Qimera’s Subset Editor, taking advantage of available overlapping swaths. Motion corrector values from POS M/V V.5 applied in real-time were verified in Attitude and Navigation editors. No tidal corrections were applied. The ASCII XYZ file was then imported into QPS Fledermaus v.7.6.3 to build an *.sd file. The *.sd file retains the resolution of the source gridded ASCII XYZ data. The *.sd file format was selected for its ability to be viewed using the Fledermaus iView4D freeware distributed by QPS.
Multibeam data was processed into Fledermaus scene files used in planing remotely-operated vehicle dives. A scene file is a combination of SD files saved into a single file, which when opened opens all the SD files in one scene . Scene files with up to four layers are viewable in Fledermaus freeware, iView4D. To create these multi-layer Fledermaus scene files, a number of additional field processing steps were performed on a subset of the multibeam files. Bathymetric SD files were run through the "Compute Slope" function in Fledermaus to generate seafloor slope maps. Fledermaus Geocoder Tool v7.3 was used to create bottom backscatter mosaic SD files. The mosaics were then draped over the bathymetric SD files using the "Attach Scalar to Surface" function in Fledermaus. ROV Dive Track points were placed on the seafloor in Fledermaus using the Geo-Picking tool, and were saved as a points layer in the scene file. Selected water column files were processed using Fledermaus FMMW, and anomalies, in particular suspected seep locations, were exported so Fledermaus SD files. These data layers were opened simultaneously in Fledermaus, then saved as a scene file with up to four layers.
processor