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What does this data set describe?

Title:
Geophysical data of field activity L-5-77-EG in Eastern Gulf of Alaska from 06/04/1977 to 06/09/1977
Abstract:
Chief Scientist: Parke Snavely. Geophysical data (transitsatellite, bathgravnav, bathnav, gravity, gradiometer, uniboom, 24channel, airgunmonitor, sonobuoy) of field activity L-5-77-EG in Eastern Gulf of Alaska from 06/04/1977 to 06/09/1977, <http://walrus.wr.usgs.gov/infobank/l/l577eg/html/l-5-77-eg.meta.html>.
Supplemental_Information:

Equipment Used -
transitsatellite
bathgravnav
bathnav
gravity
gradiometer
uniboom
24channel
airgunmonitor
sonobuoy

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-5-77-EG in Eastern Gulf of Alaska from 06/04/1977 to 06/09/1977: 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: -135.76193
    East_Bounding_Coordinate: -124.99455
    North_Bounding_Coordinate: 54.97239
    South_Bounding_Coordinate: 48.61677

  3. What does it look like?

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

    Beginning_Date: 04-Jun-1977
    Ending_Date: 09-Jun-1977
    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: Eastern 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 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:
    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>
    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?

    Parke Snavely (Chief Scientist, USGS Western Region)

  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: 12-Jun-2000 (process 1 of 3)
    Navigation Data
    Converted to time format with year at start.
    
    01/23/86 KAYE DUA0:[DATA.L577WO.N]L577WO.010;
    DRB0:[DRS.REFMT]REFORMAT.EXE;5
    
    06/12/00 DAN MOSIER SPLIT THIS FROM L577WO
    
    

    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: 09-Jun-2000 (process 2 of 3)
    Gravity Data
    10/31/1998  /tiger/l/l577eg/grav/l-5-77-eg.110_010
    /bear/programs/edit/automerge/automerge
    DAN MOSIER SPLIT THIS PART FROM L-5-77-WO, 6/9/00
    Input was...
    Converted to time format with year at start.
    
    12/17/85 BARB DUA0:[DATA.L577WO.G]L577WO.110;
    DRB0:[DRS.REFMT]REFORMAT.EXE;5
    
    Input was...
    Converted to time format with year at start.
    
    01/23/86 KAYE DUA0:[DATA.L577WO.N]L577WO.010;
    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: 21-Jun-2012 (process 3 of 3)
    Magnetics Data
    06/21/2012 carolyn l-5-77-eg.260_010
    
    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/l577wo/mag/l-5-77-wo.240_010
    /bear/programs/edit/automerge/automerge
    
    Converted to time format with year at start.
    
    01/23/86 CAROLYN DRS$DATA:[L577WO.M]L577WO.240;
    DRB0:[DRS.REFMT]REFORMAT.EXE;5
    141/2125-157/0511
    was L577WO._.MAGSA1 on TAM456
    was L577WO200.DAT   on VAM456
    157/0511-160/1517
    was L577WO._.MAGSA2 on TAM456
    was L577WO201.DAT   on VAM456
    
    Converted to time format with year at start.
    
    01/23/86 KAYE DUA0:[DATA.L577WO.N]L577WO.010;
    DRB0:[DRS.REFMT]REFORMAT.EXE;5
    
    06/12/00 DAN MOSIER SPLIT THIS PART FROM L577WO
    
    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-5-77-eg.010 [DRS])
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    197706040434400    197706040917000
    197706040923400    197706041658100
    197706041706100    197706042240400
    197706042247000    197706050032400
    197706050042000    197706050426100
    197706050432200    197706050725100
    197706050753500    197706051531300
    197706051541500    197706051742500
    197706051756100    197706060604200
    197706060614000    197706060626100
    197706060640300    197706060640300
    197706060655180    197706060655180
    197706060710180    197706060710180
    197706060725180    197706060725180
    197706060740180    197706060740180
    197706060756180    197706060756180
    197706060811180    197706060811180
    197706060826180    197706060826180
    197706060841180    197706060841180
    197706060856180    197706060856180
    197706061040000    197706061649300
    197706061657400    197706070314000
    197706070324300    197706070612100
    197706070628100    197706070705500
    197706070721100    197706071059500
    197706071116500    197706071116500
    197706071122100    197706071139100
    197706071158300    197706071739100
    197706071749500    197706071916300
    197706071933300    197706080712400
    197706080720200    197706080837300
    197706080845500    197706082011500
    197706082021500    197706090549500
    197706090601500    197706090706100
    197706090718100    197706090718100
    197706090736100    197706090736100
    197706090750100    197706091107500
    197706091114100    197706091735500
    197706091745300    197706091952100
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    Gravity Data (l-5-77-eg.110_010)
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    197706040000000    197706040917000
    197706040923400    197706050033000
    197706050042000    197706050426300
    197706050432200    197706060604200
    197706060611000    197706061649500
    197706061657400    197706070314200
    197706070320500    197706080712400
    197706080720200    197706091952100
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    Magnetics Data (l-5-77-eg.260_010)
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    197706060158140    197706081849320
    197706081857370    197706091517190
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    Seismic Shots Data (l-5-77-eg.420_010)
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    197706060139370    197706060608250
    197706060614370    197706061451010
    197706061456410    197706061653320
    197706061740090    197706070123160
    197706070129360    197706070148360
    197706070154560    197706070301230
    197706070307570    197706070510280
    197706070516270    197706070533570
    197706070539280    197706070641530
    197706070648130    197706070820580
    197706070907160    197706072257580
    197706072310570    197706072333070
    197706072339270    197706080223400
    197706080253070    197706080419140
    197706080452500    197706082335240
    197706090007000    197706090106370
    197706090148110    197706090533510
    197706090539070    197706090551290
    197706090556310    197706090556310
    197706090601320    197706091255490
    197706091342310    197706091456120
    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-5-77-EG data set <http://walrus.wr.usgs.gov/infobank/l/l577eg/html/l-5-77-eg.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: 0.8
Network links: <http://walrus.wr.usgs.gov/infobank/l/l577eg/html/l-5-77-eg.nav.html>

Data format: ASCII Size: 4.1
Network links: <http://walrus.wr.usgs.gov/infobank/l/l577eg/html/l-5-77-eg.grav.html>

Data format: ASCII Size: 1.0
Network links: <http://walrus.wr.usgs.gov/infobank/l/l577eg/html/l-5-77-eg.mag.html>

Data format: ASCII Size: 0.1
Network links: <http://walrus.wr.usgs.gov/infobank/l/l577eg/html/l-5-77-eg.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 12:51:13 2013