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What does this data set describe?

Title:
Geophysical data of field activity L-4-82-NP in Low-energy abyssal hill areas midway between San Franciso and Hawaii from 03/01/1982 to 03/15/1982
Abstract:
Chief Scientists: Dave Piper, Steve Eittreim. Geophysical data (3dot5khz, 12khz, gravity, underwatercamera, magnetics, bathnav, integratednavigation, RhoRho, transitsatellite) of field activity L-4-82-NP in Low-energy abyssal hill areas midway between San Franciso and Hawaii from 03/01/1982 to 03/15/1982, <http://walrus.wr.usgs.gov/infobank/l/l482np/html/l-4-82-np.meta.html>.
Supplemental_Information:

Equipment Used -
3dot5khz 3.5 khz bathymetry
12khz 12 khz bathymetry
gravity
underwatercamera
magnetics magnetometer
bathnav bathymetry/navigation
integratednavigation
RhoRho Loran C Rho-Rho
transitsatellite

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-4-82-NP in Low-energy abyssal hill areas midway between San Franciso and Hawaii from 03/01/1982 to 03/15/1982: 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: -157.90100
    East_Bounding_Coordinate: -127.43979
    North_Bounding_Coordinate: 36.97763
    South_Bounding_Coordinate: 21.22169

  3. What does it look like?

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

    Beginning_Date: 01-Mar-1982
    Ending_Date: 15-Mar-1982
    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:
      Low-energy abyssal hill areas midway between San Franciso and Hawaii
      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?

    Aaron Dunwald (Chief Engineer); Barb Blubaugh (Navigator); Bob Goodfellow (Watchstander); Dan Hurlbert (Mechanical Technician); Dave Melendrez (Chief Mate); Dave Piper (Chief Scientist); Hank Chezar (Watchstander); Jeff Rupert (Mechanical Technician); Jenny Bick (Navigator); Jim Basler (Navigator); Larry Kooker (Electronics Technician); Mark Yeats (Watchstander); Mike Boyle (Electronics Technician); Sara Monteith (Watchstander); Steve Eittreim (Chief Scientist); 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: 19-Jan-1996 (process 1 of 4)
    Navigation Data
    Converted to time format with year at start.
    
    05/31/85 KAYE USR$DISK:[DRS.DATA.L482NP.N]L482NP.051;
    USR$DISK:[DRS.REFMT]REFORMAT.EXE;4
    Original file name is l482np.sinsb1._, desampled to 2 minutes.
    
    

    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/l/l482np/grav/l-4-82-np.110_051
    /bear/programs/edit/automerge/automerge
    
    Input was...
    Converted to time format with year at start.
    
    10/02/85 BARB DRS$DATA:[L482NP.G]L482NP.110;
    DRS$DATA:[L482NP.G]REFGRV.EXE;
    
    Input was...
    Converted to time format with year at start.
    
    05/31/85 KAYE USR$DISK:[DRS.DATA.L482NP.N]L482NP.051;
    USR$DISK:[DRS.REFMT]REFORMAT.EXE;4
    Original file name is l482np.sinsb1._, desampled to 2 minutes.
    
    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-4-82-np.220_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/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/l/l482np/mag/l-4-82-np.200_051
    /bear/programs/edit/automerge/automerge
    
    Converted to time format with year at start.
    
    11/22/85 CAROLYN DRS$DATA:[L482NP.M]L482NP220.200;
    DRB0:[DRS.REFMT]REFORMAT.EXE;4
    was L482NP._.MAGSB1 on TAM351
    was L482NP220.DAT   on VAM351
    
    Converted to time format with year at start.
    
    05/31/85 KAYE USR$DISK:[DRS.DATA.L482NP.N]L482NP.051;
    USR$DISK:[DRS.REFMT]REFORMAT.EXE;4
    Original file name is l482np.sinsb1._, desampled to 2 minutes.
    
    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/l/l482np/bath/l-4-82-np.330_051
    /bear/programs/edit/automerge/automerge
    
    Input was...
    Converted to time format with year at start.
    
    06/10/85 BECKIE USR$DISK:[DRS.DATA.L482NP.B]L482NP.330;
    DRA1:[DRS.BAT]BATRED.EXE;1
    I believe this file to be hand-digetized bathy in
    2-way travel time/secs.  Calculated depths are based
    upon an assummed travel time of 1500M/sec.  R.Larsen.
    
    Input was...
    Converted to time format with year at start.
    
    05/31/85 KAYE USR$DISK:[DRS.DATA.L482NP.N]L482NP.051;
    USR$DISK:[DRS.REFMT]REFORMAT.EXE;4
    Original file name is l482np.sinsb1._, desampled to 2 minutes.
    
    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-4-82-np.051 [SINS])
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    198203030030590    198203030030590
    198203030058000    198203151133000
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    Gravity Data (l-4-82-np.110_051)
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    198203041735530    198203060518090
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    Magnetics Data (l-4-82-np.220_051)
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    198203041735530    198203060517330
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    Bathymetry Data (l-4-82-np.330_051)
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    198203060700000    198203060717000
    198203060730000    198203060730000
    198203060746000    198203060746000
    198203060808000    198203060808000
    198203060830000    198203060830000
    198203060842000    198203060842000
    198203060903000    198203060923000
    198203060937000    198203060937000
    198203060951000    198203060951000
    198203061003000    198203061003000
    198203061014000    198203061043000
    198203061100000    198203061133000
    198203061144000    198203061236000
    198203061256000    198203061256000
    198203061317000    198203061317000
    198203061335000    198203061335000
    198203061400000    198203061400000
    198203061415000    198203061415000
    198203061455000    198203061525000
    198203061536000    198203061536000
    198203061556000    198203061615000
    198203061630000    198203061655000
    198203061708000    198203061736000
    198203061750000    198203061813000
    198203061824000    198203061824000
    198203061836000    198203061836000
    198203061848000    198203061848000
    198203061859000    198203061859000
    198203061920000    198203061920000
    198203061932000    198203061932000
    198203061944000    198203061944000
    198203062052000    198203062115000
    198203062129000    198203062129000
    198203062140000    198203062140000
    198203062203000    198203062203000
    198203062221000    198203062245000
    198203062256000    198203062256000
    198203062312000    198203062337000
    198203062348000    198203070001000
    198203070015000    198203070021000
    198203070037000    198203070037000
    198203070052000    198203070052000
    198203070104000    198203070134000
    198203070147000    198203070227000
    198203070240000    198203070325000
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    198203071121000    198203071121000
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    198203100630000    198203100636000
    198203100648000    198203100648000
    198203100706000    198203100706000
    198203100717000    198203100717000
    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-4-82-NP data set <http://walrus.wr.usgs.gov/infobank/l/l482np/html/l-4-82-np.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/l482np/html/l-4-82-np.nav.html>

Data format: ASCII Size: 4.1
Network links: <http://walrus.wr.usgs.gov/infobank/l/l482np/html/l-4-82-np.grav.html>

Data format: ASCII Size: 1.9
Network links: <http://walrus.wr.usgs.gov/infobank/l/l482np/html/l-4-82-np.mag.html>

Data format: ASCII Size: 0.0
Network links: <http://walrus.wr.usgs.gov/infobank/l/l482np/html/l-4-82-np.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>)


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