MGL1109 Chirp - US Extended Continental Shelf Project: Gulf of Alaska CHIRP High-Resolution Seismic Profile Data
The Knudsen 2620 acquired sub-bottom profiles continuously throughout the cruise. The Knudsen was operated in 3.5 kHz Chirp mode, emitting a 1.5 kHz to 5 kHz (3 kHz bandwidth centered on 3.5 kHz) pulse from transducers mounted in the pod beneath the hull. A record window of 200 meters and assumed sound velocity of 1500 m/s remained constant through the cruise. The resulting data records were 267 msec long, with a sample interval 0.16667 msec (6 kHz). The ping rate varied over the course of the cruise. For most of the first two weeks, the ping rate was approximately 5 seconds. On or about June 23, the ping rate was increased to approximately 2 seconds.
Resources
5 resources available
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Metadata Landing Page
TEXT/HTML -
Trackline Geophysical Data Viewer
TEXT/HTML -
Request Trackline Data
TEXT/HTML -
Global Change Master Directory (GCMD) Keywords
TEXT/HTML -
NCEI Contact Information
TEXT/HTML
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Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | non-public |
| contactPoint |
{ "fn": "NOAA National Centers for Environmental Information", "@type": "vcard:Contact", "hasEmail": "mailto:ncei.info@noaa.gov" } |
| describedByType | application/octet-steam |
| description | The Knudsen 2620 acquired sub-bottom profiles continuously throughout the cruise. The Knudsen was operated in 3.5 kHz Chirp mode, emitting a 1.5 kHz to 5 kHz (3 kHz bandwidth centered on 3.5 kHz) pulse from transducers mounted in the pod beneath the hull. A record window of 200 meters and assumed sound velocity of 1500 m/s remained constant through the cruise. The resulting data records were 267 msec long, with a sample interval 0.16667 msec (6 kHz). The ping rate varied over the course of the cruise. For most of the first two weeks, the ping rate was approximately 5 seconds. On or about June 23, the ping rate was increased to approximately 2 seconds. |
| distribution |
[ { "@type": "dcat:Distribution", "title": "Metadata Landing Page", "accessURL": "https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ngdc.mgg.seismic:MGL1109_SubbottomProfiler/html", "mediaType": "text/html", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "Trackline Geophysical Data Viewer", "accessURL": "https://maps.ngdc.noaa.gov/viewers/geophysics/", "mediaType": "text/html", "description": "An interactive map of tracklines providing access to marine geophysical survey data (bathymetry, gravity, magnetics, seismics), and aeromagnetic surveys in the archive.", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "Request Trackline Data", "accessURL": "https://www.ngdc.noaa.gov/trackline/request/?surveyIds=MGL1109", "mediaType": "text/html", "description": "Download seismic data from this cruise.", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "Global Change Master Directory (GCMD) Keywords", "accessURL": "https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords", "mediaType": "text/html", "description": "The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.", "describedByType": "application/octet-stream" }, { "@type": "dcat:Distribution", "title": "NCEI Contact Information", "accessURL": "https://www.ncei.noaa.gov/contact", "mediaType": "text/html", "description": "Information for contacts at NCEI.", "describedByType": "application/octet-stream" } ] |
| identifier | https://data.noaa.gov/waf/NOAA/NESDIS/NGDC/MGG/Seismic/iso/xml/MGL1109_SubbottomProfiler.xml |
| isPartOf | MGL1109 |
| issued | 2011-06-07T00:00:00.000+00:00 |
| keyword |
[ "Seismic:Active:Subbottom", "Seismic:Reflection", "Other", "DigitalSeg:DigitallyAcquired", "[1137] Gulf of Alaska", "[1139] Aja Fracture Zone", "[1141] Surveyor Fan", "[1140] Kodiak Bowie Seamount Corridor", "[1138] Baranof Fan", "DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce", "UNH/CCOM-JHC > Center for Coastal and Ocean Mapping - Joint Hydrographic Center, University of New Hampshire" ] |
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2011-06-07T00:00:00.000+00:00 |
| publisher |
{ "name": "NOAA National Centers for Environmental Information", "@type": "org:Organization" } |
| rights | otherRestrictions, otherRestrictions |
| spatial | -138.18889,53.18759,-153.01673,57.78363 |
| theme |
[ "geospatial" ] |
| title | MGL1109 Chirp - US Extended Continental Shelf Project: Gulf of Alaska CHIRP High-Resolution Seismic Profile Data |
