- Title:
-
Geophysical data of field activity L-2-75-NP in Gulf of
Alaska from 08/25/1975 to 09/04/1975
- Abstract:
-
Chief Scientist: Dave Scholl. Geophysical data (gravity,
3dot5khz, airgun, Burgairgun, gradiometer, dopplersonar,
integratednavigation, transitsatellite, Burgsparker) of field
activity L-2-75-NP in Gulf of Alaska from 08/25/1975 to
09/04/1975,
<http://walrus.wr.usgs.gov/infobank/l/l275np/html/l-2-75-np.meta.html>.
- Supplemental_Information:
-
Equipment Used -
gravity
3dot5khz 3.5 khz bathymetry
airgun single-channel airgun
Burgairgun
gradiometer
dopplersonar
integratednavigation
transitsatellite
Burgsparker
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.).
- 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/>, 20130331, Geophysical data of field activity L-2-75-NP in Gulf of Alaska from 08/25/1975 to 09/04/1975: U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Menlo Park, CA.
Online Links:
- What geographic area does the data set cover?
- West_Bounding_Coordinate: -166.49365
- East_Bounding_Coordinate: -122.66299
- North_Bounding_Coordinate: 54.63333
- South_Bounding_Coordinate: 37.77899
- What does it look like?
- Does the data set describe conditions during a particular time period?
- Beginning_Date: 25-Aug-1975
- Ending_Date: 04-Sep-1975
- Currentness_Reference: ground condition
- What is the general form of this data set?
- How does the data set represent geographic features?
- How are geographic features stored in the data set?
- Indirect_Spatial_Reference: Gulf of Alaska
This is a Point data set.
It contains the following vector data types (SDTS terminology):
- 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
- 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:
-
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 are the originators of the data set? (may include formal authors, digital compilers, and editors)
- Who also contributed to the data set?
Byron Ruppel (Geophysicist);
Dave Scholl (Chief Scientist);
Don Tompkins (Geophysicist);
Graig McHendrie (Geophysicist);
John Howell (Geophysicist);
Keith Wilson (Geophysicist);
Pamela Smith (Dafe Curator);
Tom Atkins (Watchstander)
- To whom should users address questions about the data?
These data and information are intended for science
researchers, students from elementary through
college, policy makers, and general public.
- From what previous works were the data drawn?
- How were the data generated, processed, and modified?
- Date: 19-Jan-1996 (process 1 of 3)
-
Navigation Data
Converted to time format with year at start.
02/11/86 KAYE DUA0:[DATA.L275NP.N]L275NP.051;
DRB0:[DRS.REFMT]REFORMAT.EXE;5
Person who carried out this activity:
- Date: 20-Jun-2012 (process 2 of 3)
-
Magnetics Data
06/20/2012 carolyn l-2-75-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/l275np/mag/l-2-75-np.200_051
/bear/programs/edit/automerge/automerge
Converted to time format with year at start.
02/14/86 CAROLYN DRS$DATA:[L275NP.M]L275NP.200;
DRB0:[DRS.REFMT]REFORMAT.EXE;5
was L275NP._.MAGSX1 on TAM157
was L275NP201.DAT on VAM157
Converted to time format with year at start.
02/11/86 KAYE DUA0:[DATA.L275NP.N]L275NP.051;
DRB0:[DRS.REFMT]REFORMAT.EXE;5
time, lat, long, time(sec) to nearest nav fix, data values
Person who carried out this activity:
- Date: 31-Oct-1998 (process 3 of 3)
-
Bathymetry Data
10/31/1998 /tiger/l/l275np/bath/l-2-75-np.335_051
/bear/programs/edit/automerge/automerge
Input was...
Converted to time format with year at start.
02/14/86 BECKIE DISK$USERDISK:[CLINT.BECKIE]L275NP.335;
DRB0:[DRS.BAT]BATRED.EXE;1
This file was hand-digetized in 2-way traveltime(secs).
It was reduced with no Matthews correction and the
velocity of sound assumed was 1500m/sec.
02/14/86 BECKIE DISK$USERDISK:[CLINT.BECKIE]L275NP.310;
DRB0:[DRS.REFMT]REFORMAT.EXE;5
Input was...
Converted to time format with year at start.
02/11/86 KAYE DUA0:[DATA.L275NP.N]L275NP.051;
DRB0:[DRS.REFMT]REFORMAT.EXE;5
time, lat, long, time(sec) to nearest nav fix, data values
Person who carried out this activity:
- 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 well have the observations been checked?
Identified as best available version.
- How accurate are the geographic locations?
Unspecified
- How accurate are the heights or depths?
Unspecified
- Where are the gaps in the data? What is missing?
Start and end date/times of data
Navigation Data (l-2-75-np.051 [SINS])
YYYYMMDDHHMMSST YYYYMMDDHHMMSST
197508252252000 197508301518000
197508301606000 197508301708000
197508301754000 197508301918000
197508302002000 197508310031000
197508310134000 197508310500000
197508310546000 197508310546000
197508310730000 197508310730000
197508310814000 197508310918000
197508311108000 197508311601000
197508311720000 197508311812000
197508311938000 197508312318000
197509010001000 197509010001000
197509010102000 197509010102000
197509010301000 197509010424000
197509010532000 197509010738000
197509010828000 197509011028000
197509011112000 197509011535000
197509011618000 197509011702000
197509011744000 197509011814000
197509011856000 197509011918000
197509012008000 197509012048000
197509012130000 197509012300000
197509020003000 197509020526000
197509020612000 197509020632000
197509020716000 197509020716000
197509020808000 197509020828000
197509020910000 197509020936000
197509021020000 197509021631000
197509021716000 197509021816000
197509021900000 197509022000000
197509022112000 197509022132000
197509022214000 197509022214000
197509022300000 197509022300000
197509022342000 197509030030000
197509030129000 197509030400000
197509030446000 197509030502000
197509030556000 197509030804000
197509030852000 197509031016000
197509031100000 197509031206000
197509031252000 197509031500000
197509031607000 197509031607000
197509031700000 197509040200000
197509040302000 197509040401000
197509040500000 197509040531000
197509040618000 197509040746000
197509040832000 197509040938000
197509041020000 197509041334000
197509041431000 197509041500000
197509041600000 197509041600000
197509041702000 197509041958000
197509042050000 197509042150000
YYYYMMDDHHMMSST YYYYMMDDHHMMSST
Magnetics Data (l-2-75-np.220_051)
YYYYMMDDHHMMSST YYYYMMDDHHMMSST
197508252255320 197508270253040
197508270258530 197508271629350
197508271635350 197508280200350
197508280234410 197508280626470
197508280632140 197508291855480
YYYYMMDDHHMMSST YYYYMMDDHHMMSST
Bathymetry Data (l-2-75-np.335_051)
YYYYMMDDHHMMSST YYYYMMDDHHMMSST
197509022301060 197509022301060
197509022327360 197509022327360
197509022353000 197509022353000
197509030018300 197509030018300
197509030053240 197509030053240
197509030121480 197509030121480
197509030152420 197509030152420
197509030221240 197509030221240
197509030247300 197509030247300
197509030316180 197509030316180
197509030344060 197509030344060
197509030412300 197509030412300
197509030439420 197509030439420
197509030508420 197509030508420
197509030541480 197509030541480
197509030608420 197509030608420
197509030639300 197509030639300
197509030707000 197509030707000
197509030738240 197509030738240
197509030804480 197509030804480
197509030837360 197509030837360
197509030905480 197509030905480
197509030934300 197509030934300
197509031017000 197509031017000
197509031059120 197509031059120
197509031131300 197509031131300
197509031203180 197509031203180
197509031233120 197509031233120
197509031302060 197509031302060
197509031327540 197509031327540
197509031405480 197509031405480
197509031431540 197509031431540
197509031457540 197509031457540
197509031525480 197509031525480
197509031555060 197509031555060
197509031622120 197509031622120
197509031648180 197509031648180
197509031724060 197509031724060
197509031750120 197509031750120
197509031824300 197509031824300
197509031857240 197509031857240
197509031924240 197509031924240
197509032018480 197509032018480
197509032055240 197509032055240
197509032125000 197509032125000
197509032150360 197509032150360
197509032221000 197509032221000
197509032247060 197509032247060
197509032312240 197509032312240
197509032337420 197509032337420
197509040002420 197509040002420
197509040030000 197509040030000
197509040056540 197509040056540
197509040123540 197509040123540
197509040149540 197509040149540
197509040628540 197509040628540
197509040656180 197509040656180
197509040723060 197509040723060
197509040751420 197509040751420
197509040823060 197509040823060
197509040852060 197509040852060
197509040918300 197509040918300
197509041000060 197509041000060
197509041026360 197509041026360
197509041053420 197509041053420
197509041119120 197509041119120
197509041211180 197509041211180
197509041236240 197509041236240
197509041303240 197509041303240
197509041332480 197509041332480
197509041400060 197509041400060
197509041427420 197509041427420
197509041455300 197509041455300
197509041548540 197509041548540
197509041625180 197509041625180
197509041705060 197509041705060
197509041745000 197509041745000
197509041810000 197509041810000
197509041837240 197509041837240
197509041903180 197509041903180
197509041928300 197509041928300
197509041953360 197509041953360
197509042020120 197509042020120
YYYYMMDDHHMMSST YYYYMMDDHHMMSST
- How consistent are the relationships among the observations, including topology?
Unspecified
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.
- Who distributes the data set? (Distributor 1 of 1)
- What's the catalog number I need to order this data set?
Downloadable Data L-2-75-NP data set <http://walrus.wr.usgs.gov/infobank/l/l275np/html/l-2-75-np.meta.html>
- 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.
- How can I download or order the data?
- Availability in digital form:
- Cost to order the data: None
- Dates:
- Last modified: 31-Mar-2013
- Metadata author:
-
- 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 Sun Mar 31 07:19:59 2013
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