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What does this data set describe?

Title:
Geophysical - multichannel seismic profiling, OBS refraction, sonobuoy, XBT, gravity, multibeam bathy data of field activity L-09-11-GA in Gulf of Alaska from 06/05/2011 to 06/25/2011
Abstract:
United States Geological Survey,University of Texas,University of Wyoming. Chief Scientists: Ginger Barth, (USGS), Sean Gulick, (UTexas). Geophysical - multichannel seismic profiling, OBS refraction, sonobuoy, XBT, gravity, multibeam bathy data of field activity L-09-11-GA in Gulf of Alaska from 06/05/2011 to 06/25/2011, <http://walrus.wr.usgs.gov/infobank/l/l0911ga/html/l-09-11-ga.meta.html>.
Supplemental_Information:

Notes -
AKA MGL11-09
&nbsp;&nbsp;
2011 Gulf of Alaska, U.S. Extended Continental Shelf Project,
<a href="<http://continentalshelf.gov/missions/11missions/11alaska.html>"><http://continentalshelf.gov/missions/11missions/11alaska.html>

Similar information is available for thousands of other USGS/CMG-related Activities.
If known, available are Activity-specific navigation, gravity, magnetics, bathymetry, seismic, and sampling data; track maps; and equipment information; as well as summary overviews, crew lists, and information about analog materials.
If available, access to physical samples is described in the "WR CMG Sample Distribution Policy" at:
<http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html>
Primary access to the USGS/CMG Information Bank's digital data, analog data, and metadata is provided through... <http://walrus.wr.usgs.gov/infobank/>
This page accomodates a variety of search approaches (e.g., by platform, by region, by scientist, by equipment type, etc.).
  1. How should this data set be cited?

    U.S. Geological Survey (USGS) <http://www.usgs.gov/>, Coastal and Marine Geology Program (CMGP) <http://marine.usgs.gov/>, 20131029, Geophysical - multichannel seismic profiling, OBS refraction, sonobuoy, XBT, gravity, multibeam bathy data of field activity L-09-11-GA in Gulf of Alaska from 06/05/2011 to 06/25/2011: U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Menlo Park, CA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -152.12600
    East_Bounding_Coordinate: -138.24900
    North_Bounding_Coordinate: 57.19880
    South_Bounding_Coordinate: 53.27950

  3. What does it look like?

    <http://walrus.wr.usgs.gov/infobank/l/l0911ga/html/l-09-11-ga.nav.gif> (GIF)
    Trackline map of L-09-11-GA
    <http://walrus.wr.usgs.gov/infobank/l/l0911ga/html/l-09-11-ga.seis.gif> (GIF)
    Seismic shot point data trackline map of L-09-11-GA

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 05-Jun-2011
    Ending_Date: 25-Jun-2011
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      Indirect_Spatial_Reference: Gulf of Alaska
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point

    2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257.

      Vertical_Coordinate_System_Definition:
      Depth_System_Definition:
      Depth_Datum_Name: Local surface
      Depth_Resolution: 0.1
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Attribute values


  7. How does the data set describe geographic features?

    Entity_and_Attribute_Overview:
    Navigation with Time Stamp <http://walrus.wr.usgs.gov/infobank/programs/html/definition/nav.html>
    Entity_and_Attribute_Overview:
    Seismic Shots with Time Stamp <http://walrus.wr.usgs.gov/infobank/programs/html/definition/seis.html>


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    Ginger Barth); Jon Childs); Pat Hart); Ray Sliter); Jenny White); Pete Dal Ferro); George Tate); Sean Gulick (U Texas); Bobby Reese (U Texas); Maureen LeVoir (U Texas); Kevin Johnson (U Texas); Ryan Lester (U Texas); Erik Everson (U Wyoming)

  3. To whom should users address questions about the data?

    U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>
    Attn: Clint Steele <http://walrus.wr.usgs.gov/staff/csteele.html>
    InfoBank Group Leader <http://walrus.wr.usgs.gov/staff/csteele.html>
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA 94025-3561
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    infobank@octopus.wr.usgs.gov <mailto:infobank@octopus.wr.usgs.gov>


Why was the data set created?

These data and information are intended for science researchers, students from elementary through college, policy makers, and general public.


How was the data set created?

  1. From what previous works were the data drawn?

  2. How were the data generated, processed, and modified?

    Date: 20-Aug-2012 (process 1 of 1)
    Navigation Data
    08/20/2012 /infobank/l/l0911ga/nav/l-09-11-ga.060
    time/lat/long style, multi-record, in caps, without tabs
    temporal-spatial data
    reformata
    
    Input was...
    08/17/2012 /infobank/l/l10911ga/seis/l-09-11-ga.410_mcs
    
    08/17/2012 ray l-09-11-ga.410_mcs
    
    merged segy times and shots with times frm p190 files
    shot on distance (50 meters)
    
    08/16/2012 ray l0911.nodup
    
    
    08/16/2012 ray l0911ga_p190.060
    
    time/lat/long style, multi-record, in caps, without tabs
    
    8/15/2012 fwong@usgs.gov
    C (common midpoint) records from p190 files for L-09-11-GA from
          /seisdata5/l0911ga/ship_data/processed/sprint/
    only V (vessel reference point) records available for MGL1109OBS2A
          extracted by /we/florence/rsliter/p190export/export_p190.csh
    modified from script provided by Bobby Reece, U of Texas
    yyyydddmmhhsst, latitude, longitude, depth_m, shot_p190, x_utm06, y_utm06, lineid
    
           1         2         3
    3456789012345678901234567890123456
    
    

    Person who carried out this activity:

    U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>
    Attn: Clint Steele <http://walrus.wr.usgs.gov/staff/csteele.html>
    InfoBank Group Leader <http://walrus.wr.usgs.gov/staff/csteele.html>
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA 94025-3561
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    infobank@octopus.wr.usgs.gov <mailto:infobank@octopus.wr.usgs.gov>

  3. What similar or related data should the user be aware of?

    U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Unknown, USGS/CMG Information Bank <http://walrus.wr.usgs.gov/infobank/>: U.S. Geological Survey (USGS) <http://www.usgs.gov> Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Menlo Park, CA.

    Online Links:


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    Identified as best available version.

  2. How accurate are the geographic locations?

    Unspecified

  3. How accurate are the heights or depths?

    Unspecified

  4. Where are the gaps in the data? What is missing?

    Start and end date/times of data

    Navigation Data (l-09-11-ga.060 [GPS])
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    201106081201320    201106081341570
    201106081528110    201106090548450
    201106090940100    201106091616170
    201106091859020    201106092123410
    201106092254010    201106101454130
    201106101715480    201106101926440
    201106110151280    201106111108080
    201106111128110    201106120454060
    201106120828330    201106141643090
    201106141939270    201106150446520
    201106150504000    201106160135500
    201106160210000    201106161450240
    201106161500000    201106161501100
    201106161524070    201106161528340
    201106161550580    201106170227130
    201106170849070    201106172200280
    201106172224290    201106180231440
    201106180257390    201106190247210
    201106190429050    201106190429270
    201106190440240    201106191459560
    201106191555030    201106201155530
    201106210447410    201106211447350
    201106211550450    201106222352440
    201106230001150    201106230607180
    201106230613110    201106241645130
    201106241651180    201106241825540
    201106241850560    201106242051110
    201106242337420    201106252152360
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    Seismic Shots Data (l-09-11-ga.410_mcs)
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    201106081201320    201106081341570
    201106081528110    201106090548450
    201106090940100    201106091616170
    201106091859020    201106092123410
    201106092254010    201106101454130
    201106101715480    201106101926440
    201106110151280    201106111108080
    201106111128110    201106120454060
    201106120828330    201106141643090
    201106141939270    201106150446520
    201106150504000    201106160135500
    201106160210000    201106161450240
    201106161500000    201106161501100
    201106161524070    201106161528340
    201106161550580    201106170227130
    201106170849070    201106172200280
    201106172224290    201106180231440
    201106180257390    201106190247210
    201106190429050    201106190429270
    201106190440240    201106191459560
    201106191555030    201106201155530
    201106210447410    201106211447350
    201106211550450    201106222352440
    201106230001150    201106230607180
    201106230613110    201106241645130
    201106241651180    201106241825540
    201106241850560    201106242051110
    201106242337420    201106252152360
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    

  5. How consistent are the relationships among the observations, including topology?

    Unspecified


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints:
Physical materials are under controlled on-site access.
If available, access to physical samples is described in the "WR CMG Sample Distribution Policy" at: <http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html>
Use_Constraints:
Please recognize the U.S. Geological Survey (USGS) as the source of this information.
Physical materials are under controlled on-site access.
Some USGS information accessed through this means may be preliminary in nature and presented without the approval of the Director of the USGS. This information is provided with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the responsibility of the user.
This information is not intended for navigational purposes.
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

  1. Who distributes the data set? (Distributor 1 of 1)

    U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>
    Attn: Clint Steele <http://walrus.wr.usgs.gov/staff/csteele.html>
    InfoBank Group Leader <http://walrus.wr.usgs.gov/staff/csteele.html>
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA 94025-3561
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    infobank@octopus.wr.usgs.gov <mailto:infobank@octopus.wr.usgs.gov>

  2. What's the catalog number I need to order this data set?

    Downloadable Data L-09-11-GA data set <http://walrus.wr.usgs.gov/infobank/l/l0911ga/html/l-09-11-ga.meta.html>

  3. What legal disclaimers am I supposed to read?

    Please recognize the U.S. Geological Survey (USGS) as the source of this information.
    Physical materials are under controlled on-site access.
    Some USGS information accessed through this means may be preliminary in nature and presented without the approval of the Director of the USGS. This information is provided with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the responsibility of the user.
    This information is not intended for navigational purposes.
    Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

  4. How can I download or order the data?

    • Availability in digital form:

Data format: ASCII Size: 2.1
Network links: <http://walrus.wr.usgs.gov/infobank/l/l0911ga/html/l-09-11-ga.nav.html>

Data format: ASCII Size: 4.5
Network links: <http://walrus.wr.usgs.gov/infobank/l/l0911ga/html/l-09-11-ga.seis.html>

  • Cost to order the data: None


  • Who wrote the metadata?

    Dates:
    Last modified: 29-Oct-2013
    Metadata author:
    U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>
    Attn: Clint Steele <http://walrus.wr.usgs.gov/staff/csteele.html>
    InfoBank Group Leader <http://walrus.wr.usgs.gov/staff/csteele.html>
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA 94025-3561
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    infobank@octopus.wr.usgs.gov <mailto:infobank@octopus.wr.usgs.gov>

    Metadata standard:
    FGDC Content Standards for Digital Geospatial Metadata <http://www.fgdc.gov/> (FGDC-STD-001-1998 <http://www.its.nbs.gov/nbs/meta/meta.html>)


    Generated by mp version 2.9.13 on Tue Oct 29 12:50:15 2013