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What does this data set describe?

Title:
Geophysical data of field activity L-4-81-NC in Off San Mateo County, Northern California from 05/12/1981 to 05/13/1981
Abstract:
Chief Scientist: Dave McCulloch. Geophysical data (dopplersonar, integratednavigation, miniranger, transitsatellite, 3dot5khz, 12khz, magnetics, gravity, uniboom, sparker, RhoRho) of field activity L-4-81-NC in Off San Mateo County, Northern California from 05/12/1981 to 05/13/1981, <http://walrus.wr.usgs.gov/infobank/l/l481nc/html/l-4-81-nc.meta.html>.
Supplemental_Information:

Equipment Used -
dopplersonar
integratednavigation
miniranger
transitsatellite
3dot5khz 3.5 khz bathymetry
12khz 12 khz bathymetry
magnetics shipboard magnetics
gravity shipboard gravity
uniboom
sparker single-channel sparker
RhoRho

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 data of field activity L-4-81-NC in Off San Mateo County, Northern California from 05/12/1981 to 05/13/1981: 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: -124.53240
    East_Bounding_Coordinate: -122.18615
    North_Bounding_Coordinate: 40.79724
    South_Bounding_Coordinate: 37.10279

  3. What does it look like?

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

    Beginning_Date: 12-May-1981
    Ending_Date: 13-May-1981
    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: Off San Mateo County, Northern California
      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?

    Carolyn Degnan (Navigator); Dan Hurlbert (Watchstander); Dave Hogg (Electronics Technician); Dave McCulloch (Chief Scientist); Dennis Mann (Watchstander); Dave Melendrez (Chief Mate); Doug Rearic (Watchstander); Greg Lewis (Watchstander); Jim Saltzgaber (Chief Engineer); Kaye Kinoshita (Navigator); Kevin O'Toole (Mechanical Technician); Lisa Gossett (Navigator); Roy Fields (Electronics Technician); Russ Crane (Watchstander); Terry Ruff (Ship Captain)

  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: 21-Jan-1997 (process 1 of 4)
    Navigation Data
    01/21/97 clint l-4-81-nc.052
    /bear/programs/refmt/vms2unix/vms2unix
    Integrated navigation (SINS) data
    
    Input was...
    07/12/85 KAYE DUA0:[DATA.L481NC.N]L481NC.052;
    DRB0:[DRS.REFMT]REFORMAT.EXE;4
    Original file name is l481nc.sinsc1._.
    
    

    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-Oct-2008 (process 2 of 4)
    Gravity Data
    10/20/2008 clint l-4-81-nc.161_052
    /infobank/programs/edit/automerge/automerge
    
    Input was...
    Converted to time format with year at start.
    
    10/11/85 BARB DRS$DATA:[L481NC.G]L481NC.161;
    DRB0:[DRS.REFMT]REFORMAT.EXE;4
    
    Input was...
    01/21/97 clint l-4-81-nc.052
    /bear/programs/refmt/vms2unix/vms2unix
    Integrated navigation (SINS) data
    
    07/12/85 KAYE DUA0:[DATA.L481NC.N]L481NC.052;
    DRB0:[DRS.REFMT]REFORMAT.EXE;4
    Original file name is l481nc.sinsc1._.
    
    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 l-4-81-nc.220_052
    
    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...
    10/20/2008 clint l-4-81-nc.200_052
    /infobank/programs/edit/automerge/automerge
    
    Converted to time format with year at start.
    
    11/18/85 CAROLYN DRS$DATA:[L481NC.M]L481NC.200;
    DRB0:[DRS.REFMT]REFORMAT.EXE;4
    was L481NC._.MAGSB1       on TAM277
    was L481NC220.DAT         on VAM277
    
    01/21/97 clint l-4-81-nc.052
    /bear/programs/refmt/vms2unix/vms2unix
    Integrated navigation (SINS) data
    
    07/12/85 KAYE DUA0:[DATA.L481NC.N]L481NC.052;
    DRB0:[DRS.REFMT]REFORMAT.EXE;4
    Original file name is l481nc.sinsc1._.
    
    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-Oct-2008 (process 4 of 4)
    Bathymetry Data
    10/20/2008 clint l-4-81-nc.301_052
    /infobank/programs/edit/automerge/automerge
    
    Input was...
    Converted to time format with year at start.
    
    08/29/85 BECKIE DUA0:[DATA.L481NC.B]L481NC.301;
    DRB0:[DRS.DSMPL]DESAMTIME.EXE;1
    This file is edited 2 min. digitrack bathy.
    
    Input was...
    01/21/97 clint l-4-81-nc.052
    /bear/programs/refmt/vms2unix/vms2unix
    Integrated navigation (SINS) data
    
    07/12/85 KAYE DUA0:[DATA.L481NC.N]L481NC.052;
    DRB0:[DRS.REFMT]REFORMAT.EXE;4
    Original file name is l481nc.sinsc1._.
    
    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:


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-4-81-nc.052 [SINS])
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    198105121656000    198105122048000
    198105122115550    198105130242000
    198105130248000    198105151527000
    198105151539000    198105151549000
    198105151558000    198105171206000
    198105171213000    198105181402000
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    Gravity Data (l-4-81-nc.161_052)
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    198105121656300    198105131653000
    198105132106180    198105132113180
    198105132127480    198105160537060
    198105160542180    198105162256540
    198105162302240    198105181402000
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    Magnetics Data (l-4-81-nc.220_052)
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    198105140640000    198105140641200
    198105140713200    198105140714400
    198105140723200    198105140727200
    198105141108200    198105141110200
    198105160112000    198105160116400
    198105160147400    198105160243200
    198105160252200    198105160252200
    198105160302200    198105160302200
    198105160318400    198105160324200
    198105160332400    198105160356000
    198105160444000    198105180634560
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    Bathymetry Data (l-4-81-nc.301_052)
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    198105121657300    198105131656400
    198105132111200    198105132117200
    198105132132500    198105141405400
    198105141411000    198105160541070
    198105160547190    198105161431480
    198105161437160    198105162301560
    198105162307240    198105180121400
    198105180126440    198105181402000
    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-4-81-NC data set <http://walrus.wr.usgs.gov/infobank/l/l481nc/html/l-4-81-nc.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: 0.3
Network links: <http://walrus.wr.usgs.gov/infobank/l/l481nc/html/l-4-81-nc.nav.html>

Data format: ASCII Size: 0.7
Network links: <http://walrus.wr.usgs.gov/infobank/l/l481nc/html/l-4-81-nc.grav.html>

Data format: ASCII Size: 2.6
Network links: <http://walrus.wr.usgs.gov/infobank/l/l481nc/html/l-4-81-nc.mag.html>

Data format: ASCII Size: 0.2
Network links: <http://walrus.wr.usgs.gov/infobank/l/l481nc/html/l-4-81-nc.bath.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 12:51:07 2013