MGL1109 Chirp - US Extended Continental Shelf Project: Gulf of Alaska CHIRP High-Resolution Seismic Profile Data

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.

Resources

Name Format Description Link
0 https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ngdc.mgg.seismic:MGL1109_SubbottomProfiler/html
0 An interactive map of tracklines providing access to marine geophysical survey data (bathymetry, gravity, magnetics, seismics), and aeromagnetic surveys in the archive. https://maps.ngdc.noaa.gov/viewers/geophysics/
0 Download seismic data from this cruise. https://www.ngdc.noaa.gov/trackline/request/?surveyIds=MGL1109
0 Information for contacts at NCEI. https://www.ncei.noaa.gov/contact
0 NOAA GeoPlatform listing for Trackline Geophysical Data https://noaa.maps.arcgis.com/home/item.html?id=9548e62e560d4fcc8183337c54124747
23 REST endpoint for Geophysical Trackline Data dynamic map service https://gis.ngdc.noaa.gov/arcgis/rest/services/web_mercator/trackline_combined_dynamic/MapServer
52 Capabilities document for Open Geospatial Consortium Web Map Service for Geophysical Trackline Data https://gis.ngdc.noaa.gov/arcgis/services/web_mercator/trackline_combined_dynamic/MapServer/WMSServer?request=GetCapabilities&service=WMS
0 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. https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords
21 Please see website for more information about Marine Geophysical Trackline Data. https://ngdc.noaa.gov/mgg/geodas/trackline.html
21 Please see website for more information about airborne magnetic data. https://ngdc.noaa.gov/geomag/aromag.shtml
0 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. https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords

Tags

  • nesdis
  • [1138] baranof fan
  • [1140] kodiak bowie seamount corridor
  • noaa
  • unh/ccom-jhc
  • u.s. department of commerce
  • university of new hampshire
  • doc/noaa/nesdis/ncei
  • other
  • seismic:reflection
  • seismic:active:subbottom
  • [1141] surveyor fan
  • center for coastal and ocean mapping - joint hydrographic center
  • [1139] aja fracture zone
  • digitalseg:digitallyacquired
  • national centers for environmental information
  • [1137] gulf of alaska

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