MGL111 Chirp - US Extended Continental Shelf Project: Bering Sea 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 100 or 200 meters and assumed sound velocity of 1500 m/s remained constant through the cruise, except for areas where topographic variation dictated a greater than 200 meter record window. The resulting data records were 131 or 261 msec long, with a sample interval 0.038 msec. The ping rate varied over the course of the cruise, generally between 4 and 6 seconds.

Resources

Name Format Description Link
0 https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ngdc.mgg.seismic:MGL1111_SubbottomProfiler/html
0 Information for contacts at NCEI. https://www.ncei.noaa.gov/contact
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
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 Download seismic data from this cruise. https://www.ngdc.noaa.gov/trackline/request/?surveyIds=MGL1111
0 NOAA GeoPlatform listing for Trackline Geophysical Data https://noaa.maps.arcgis.com/home/item.html?id=9548e62e560d4fcc8183337c54124747
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 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
23 REST endpoint for Geophysical Trackline Data dynamic map service https://gis.ngdc.noaa.gov/arcgis/rest/services/web_mercator/trackline_combined_dynamic/MapServer
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

  • [1493] aleutian basin
  • nesdis
  • [1495] bowers ridge
  • noaa
  • [1494] shirshov ridge
  • unh/ccom-jhc
  • u.s. department of commerce
  • university of new hampshire
  • doc/noaa/nesdis/ncei
  • other
  • seismic:reflection
  • seismic:active:subbottom
  • center for coastal and ocean mapping - joint hydrographic center
  • digitalseg:digitallyacquired
  • national centers for environmental information

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