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What does this data set describe?

Title:
Geophysical data of field activity L-2-90-NC in Northern California from 04/17/1990 to 04/23/1990
Abstract:
Chief Scientist: Jon Childs. Geophysical data (3dot5khz, 12khz, uniboom, airgun, gravity, magnetics, GPS, integratednavigation, RhoRho, airgunmonitor, 24channel) of field activity L-2-90-NC in Northern California from 04/17/1990 to 04/23/1990, <http://walrus.wr.usgs.gov/infobank/l/l290nc/html/l-2-90-nc.meta.html>.
Supplemental_Information:

Equipment Used -
3dot5khz 3.5 khz bathymetry
12khz 12 khz bathymetry
uniboom
airgun single-channel airgun
gravity
magnetics magnetometer
GPS GPS satellite
integratednavigation
RhoRho LoranC Rho-Rho
airgunmonitor single-channel airgun monitor
24channel 24-channel seismic

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-2-90-NC in Northern California from 04/17/1990 to 04/23/1990: 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: -122.79261
    East_Bounding_Coordinate: -121.87233
    North_Bounding_Coordinate: 36.92863
    South_Bounding_Coordinate: 36.20948

  3. What does it look like?

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

    Beginning_Date: 17-Apr-1990
    Ending_Date: 23-Apr-1990
    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: 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 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:
    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?

    Al McClenaghan (Ship Captain); Bette Lu Krause (Chief Mate); Bill Lafleur (Chief Engineer); Bill Robinson (Electrical Engineer); Dave Caplan (Navigator); Dave Hogg (Electronics Technician); Dave Scholl (Geologist); Dennis Mann (Geophysicist); Eric Geist (Geophysicist); Graig McHendrie (Navigator); Hal Williams (Mechanical Technician); Joe Thomas (Electronics Technician); Jon Childs (Chief Scientist); Kaye Kinoshita (Navigator); Kent Vallier (Unspecified Investigator); Kevin O'Toole (Mechanical Technician); Mike Boyle (Electronics Technician); Pat Hart (Geophysicist); Ransom Rideout (Mechanical Technician)

  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-Dec-1999 (process 1 of 3)
    Navigation Data
    Converted to time format with year at start.
    
    05/23/90 EDM DRS$DATA:[L290NC.N]L290NC.051;1
    DUA0:[DRS.PLT.NAVED]NAVED.EXE;13
    Integrated navigation (SINS) data
    
    

    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 3)
    Gravity Data
    10/31/1998  /tiger/l/l290nc/grav/l-2-90-nc.102_051
    /bear/programs/edit/automerge/automerge
    
    Input was...
    Converted to time format with year at start.
    
    06/14/90 HARRY DRS$DATA:[L290NC.G]L290NC.102;1
    DUA0:[DRS.GRV]VALIDGRAV.EXE;
    Raw gravity data from digital meter
    
    06/12/90 HARRY DRS$DATA:[L290NC.G]L290NC.101;1
    DUA0:[DRS.TIME]FIXM32TIME.EXE;
    Raw gravity data from digital meter
    Input was...
    Converted to time format with year at start.
    
    05/23/90 EDM DRS$DATA:[L290NC.N]L290NC.051;1
    DUA0:[DRS.PLT.NAVED]NAVED.EXE;13
    Integrated navigation (SINS) data
    
    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 3)
    Magnetics Data
    06/20/2012 carolyn l-2-90-nc.221_051
    
    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/magred1111/magred1111.for
    Using geodetic coordinate system (Earth shape approximated by spheriod)
    with altitude 0.0 km (for sea level).
    
    Input was...
    10/31/1998  /tiger/l/l290nc/mag/l-2-90-nc.220_051
    /bear/programs/edit/automerge/automerge
    
    Converted to time format with year at start.
    
    06/21/90 HARRY DUA0:[DATA.L290NC.M]L290NC.220;1
    DUA0:[DRS.MAG]MAGRED.EXE;5
    Edited magnetics data
    
    06/20/90 HARRY DRS$DATA:[L290NC.M.WORK]L290NC.202;1
    DUA0:[DRS.MAG]ZEROMAG.EXE;
    Raw magnetics data
    
    06/20/90 HARRY DRS$DATA:[L290NC.M.WORK]DAY112.201;2
    DUA0:[DRS.PLT.GRAPHED]GRAPHED.EXE;1
    Raw magnetics data
    
    05/23/90 EDM DRS$DATA:[L290NC.N]L290NC.051;1
    DUA0:[DRS.PLT.NAVED]NAVED.EXE;13
    Integrated navigation (SINS) data
    
    Converted to time format with year at start.
    
    05/23/90 EDM DRS$DATA:[L290NC.N]L290NC.051;1
    DUA0:[DRS.PLT.NAVED]NAVED.EXE;13
    Integrated navigation (SINS) data
    
    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-2-90-nc.051 [SINS])
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    199004182112460    199004190025000
    199004190610450    199004190828000
    199004200002000    199004200407000
    199004200728190    199004201504000
    199004212333500    199004221137570
    199004221530570    199004221620550
    199004221849550    199004230042550
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    Gravity Data (l-2-90-nc.102_051)
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    199004182113000    199004212032000
    199004212038400    199004220148200
    199004220203000    199004230042400
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    Magnetics Data (l-2-90-nc.221_051)
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    199004220243160    199004220245275
    199004221147290    199004221148030
    199004221248097    199004221629108
    199004221849288    199004221913174
    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-2-90-NC data set <http://walrus.wr.usgs.gov/infobank/l/l290nc/html/l-2-90-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: 0.1
Network links: <http://walrus.wr.usgs.gov/infobank/l/l290nc/html/l-2-90-nc.nav.html>

Data format: ASCII Size: 3.3
Network links: <http://walrus.wr.usgs.gov/infobank/l/l290nc/html/l-2-90-nc.grav.html>

Data format: ASCII Size: 0.1
Network links: <http://walrus.wr.usgs.gov/infobank/l/l290nc/html/l-2-90-nc.mag.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 12:50:52 2013