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What does this data set describe?

Title:
Geophysical data of field activity 71006 (U-6-71-AT) in Liberia to Puerto Rico, Atlantic Ocean from 11/24/1971 to 12/09/1971
Abstract:
United States Geological Survey, Woods Hole, Massachusetts. Chief Scientist: Marty Kane. Geophysical data (magnetics, bathymetry) of field activity 71006 (U-6-71-AT) in Liberia to Puerto Rico, Atlantic Ocean from 11/24/1971 to 12/09/1971, <http://walrus.wr.usgs.gov/infobank/u/u671at/html/u-6-71-at.meta.html>.
Supplemental_Information:

Equipment Used -
magnetics
bathymetry
Publications -
U671AT Cruise Report exists at Woods Hole

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/>, 20131030, Geophysical data of field activity 71006 (U-6-71-AT) in Liberia to Puerto Rico, Atlantic Ocean from 11/24/1971 to 12/09/1971: 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: -62.96440
    East_Bounding_Coordinate: -10.90170
    North_Bounding_Coordinate: 17.69430
    South_Bounding_Coordinate: 6.03600

  3. What does it look like?

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

    Beginning_Date: 24-Nov-1971
    Ending_Date: 09-Dec-1971
    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: Liberia to Puerto Rico, Atlantic Ocean
      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 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.

      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:
    Bathymetry with Time Stamp <http://walrus.wr.usgs.gov/infobank/programs/html/definition/bath.html>
    Entity_and_Attribute_Overview:
    Gravity with Time Stamp <http://walrus.wr.usgs.gov/infobank/programs/html/definition/grav.html>
    Entity_and_Attribute_Overview:
    Magnetics with Time Stamp <http://walrus.wr.usgs.gov/infobank/programs/html/definition/mag.html>
    Entity_and_Attribute_Overview:
    Navigation with Time Stamp <http://walrus.wr.usgs.gov/infobank/programs/html/definition/nav.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?

    Marty Kane (Chief Scientist)

  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: 15-Dec-1995 (process 1 of 4)
    Navigation Data
    Converted to time format with year at start.
    
    02/11/86 KAYE DUA0:[DATA.U671AT.N]U671AT.050;
    DRB0:[DRS.REFMT]REFORMAT.EXE;5
    
    

    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>

    Date: 31-Oct-1998 (process 2 of 4)
    Gravity Data
    10/31/1998  /tiger/u/u671at/grav/u-6-71-at.161_050
    /bear/programs/edit/automerge/automerge
    
    Input was...
    Converted to time format with year at start.
    
    04/22/86 CLINT DUA0:[DATA.U671AT]U671AT.161;
    DRB0:[DRS.NGDC]UNREFNGDC.EXE;
    I believe this file is correct for free-air
    values. U671at.160 has free-air values that do
    not correspond to the values given for the
    observed and theoretical gravity. RLarsen.
    
    Input was...
    Converted to time format with year at start.
    
    02/11/86 KAYE DUA0:[DATA.U671AT.N]U671AT.050;
    DRB0:[DRS.REFMT]REFORMAT.EXE;5
    
    time, lat, long, time(sec) to nearest nav fix, data values
    

    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>

    Date: 20-Jun-2012 (process 3 of 4)
    Magnetics Data
    06/20/2012 carolyn u-6-71-at.220_050
    
    Reprocessed using subroutines from Susan Macmillan's
    IGRF SYNTHESIS PROGRAM <http://www.ngdc.noaa.gov/IAGA/vmod/igrf11.f>
    with IGRF-11 coeffiecients integrated into the source code.
    /infobank/programs/mag/magred11/magred11.for
    Using geodetic coordinate system (Earth shape approximated by spheriod)
    with altitude 0.0 km (for sea level).
    
    Input was...
    10/31/1998  /tiger/u/u671at/mag/u-6-71-at.200_050
    /bear/programs/edit/automerge/automerge
    
    Converted to time format with year at start.
    
    03/10/86 CAROLYN DRS$DATA:[U671AT.M]U671AT.200;
    DRB0:[DRS.REFMT]REFORMAT.EXE;5
    was U671AT.220 from 71BKUP
    
    03/22/85 CAROLYN USR$DISK:[DRS.DATA.U6.M]U671AT.220;
    USR$DISK:[DRS.REFMT]REFORMAT.EXE;3
    
    Converted to time format with year at start.
    
    02/11/86 KAYE DUA0:[DATA.U671AT.N]U671AT.050;
    DRB0:[DRS.REFMT]REFORMAT.EXE;5
    
    time, lat, long, time(sec) to nearest nav fix, data values
    

    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>

    Date: 31-Oct-1998 (process 4 of 4)
    Bathymetry Data
    10/31/1998  /tiger/u/u671at/bath/u-6-71-at.325_050
    /bear/programs/edit/automerge/automerge
    
    Input was...
    Converted to time format with year at start.
    
    03/07/86 BECKIE DUA0:[DATA.U671AT]U671AT.325;
    DRB0:[DRS.REFMT]REFORMAT.EXE;5
    
    Input was...
    Converted to time format with year at start.
    
    02/11/86 KAYE DUA0:[DATA.U671AT.N]U671AT.050;
    DRB0:[DRS.REFMT]REFORMAT.EXE;5
    
    time, lat, long, time(sec) to nearest nav fix, data values
    

    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:

    Other_Citation_Details: U671AT Cruise Report exists at Woods Hole


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 (u-6-71-at.050 [SINS])
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    197111241740000    197112022111360
    197112022121480    197112022130000
    197112022141060    197112022141060
    197112022151180    197112022201300
    197112022211420    197112022211420
    197112022230000    197112022231000
    197112022241120    197112022241120
    197112022251300    197112022301360
    197112022311480    197112022331120
    197112022351360    197112030000000
    197112030011000    197112030011000
    197112030021060    197112030031180
    197112030041300    197112030041300
    197112030051420    197112030100000
    197112030111060    197112030111060
    197112030121180    197112030131300
    197112030141420    197112030141420
    197112030151540    197112030201060
    197112030211180    197112030211180
    197112030221360    197112030241000
    197112030251180    197112030301300
    197112030311480    197112030331120
    197112030341300    197112030341300
    197112030351420    197112030400000
    197112030411060    197112030411060
    197112030421240    197112030431360
    197112030441480    197112030501120
    197112030511240    197112030511240
    197112030521360    197112030541000
    197112030551180    197112030601300
    197112030611480    197112030631120
    197112030641240    197112030641240
    197112030651360    197112030711000
    197112030721060    197112030731180
    197112030741300    197112030741300
    197112030751420    197112030800000
    197112030811060    197112030811060
    197112030821180    197112030831300
    197112030841420    197112030841420
    197112030851540    197112030901000
    197112030911120    197112030911120
    197112030921240    197112030931360
    197112030941480    197112031001060
    197112031011180    197112031011180
    197112031021360    197112031041000
    197112031051180    197112051730000
    197112051800000    197112061000000
    197112061010060    197112061010060
    197112061020180    197112071210420
    197112071220480    197112091950360
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    Gravity Data (u-6-71-at.161_050)
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    197111241740000    197111252200000
    197111252215000    197111260710000
    197111260720000    197111262145000
    197111262205000    197111272150000
    197111272300000    197111282145000
    197111282215000    197111290010000
    197111290020000    197111300625000
    197111300635000    197111301850000
    197111301915000    197111301920000
    197111301950000    197111302005000
    197111302025000    197111302045000
    197111302100000    197112010140000
    197112010200000    197112021025000
    197112021035000    197112021250000
    197112021300000    197112021715000
    197112031100000    197112040325000
    197112040345000    197112040350000
    197112040400000    197112041545000
    197112041555000    197112050250000
    197112050300000    197112051725000
    197112051800000    197112060945000
    197112061030000    197112061515000
    197112061525000    197112070310000
    197112070320000    197112070625000
    197112070640000    197112071200000
    197112071230000    197112082030000
    197112082040000    197112091950000
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    Magnetics Data (u-6-71-at.220_050)
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    197111241801060    197111280411180
    197111280431480    197111280711060
    197111280731300    197111300720060
    197111300740300    197111302350120
    197112010010300    197112021801060
    197112021821540    197112022331120
    197112022351360    197112051630120
    197112051910120    197112091950360
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    Bathymetry Data (u-6-71-at.325_050)
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    197111241740000    197111250405000
    197111250525000    197111280230000
    197111280240000    197112021030000
    197112021300000    197112021730000
    197112031100000    197112032120000
    197112032130000    197112040505000
    197112040520000    197112040710000
    197112040716000    197112041220000
    197112041230000    197112041930000
    197112041950000    197112070945000
    197112071005000    197112080525000
    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 71006 (U-6-71-AT) data set <http://walrus.wr.usgs.gov/infobank/u/u671at/html/u-6-71-at.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: 0.2
Network links: <http://walrus.wr.usgs.gov/infobank/u/u671at/html/u-6-71-at.nav.html>

Data format: ASCII Size: 0.3
Network links: <http://walrus.wr.usgs.gov/infobank/u/u671at/html/u-6-71-at.grav.html>

Data format: ASCII Size: 0.1
Network links: <http://walrus.wr.usgs.gov/infobank/u/u671at/html/u-6-71-at.mag.html>

Data format: ASCII Size: 0.3
Network links: <http://walrus.wr.usgs.gov/infobank/u/u671at/html/u-6-71-at.bath.html>

  • Cost to order the data: None


  • Who wrote the metadata?

    Dates:
    Last modified: 30-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 Wed Oct 30 07:59:33 2013