- Title:
-
Geophysical data of field activity A-1T-77-CP in Tonga,
Central Pacific from 09/16/1977 to 10/02/1977
- Abstract:
-
Hawaii Institute of Geophysics. Chief Scientist: Jim Eade.
Geophysical data (radar, sextant, 7khz) of field activity
A-1T-77-CP in Tonga, Central Pacific from 09/16/1977 to
10/02/1977,
<http://walrus.wr.usgs.gov/infobank/a/a1t77cp/html/a-1t-77-cp.meta.html>.
- Supplemental_Information:
-
Equipment Used -
radar
sextant
7khz bathymetry
Notes -
Hawaii Institute Geophysics for CCOPSOPAC
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 A-1T-77-CP in Tonga, Central Pacific from 09/16/1977 to 10/02/1977: U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Menlo Park, CA.
Online Links:
- What geographic area does the data set cover?
- West_Bounding_Coordinate: -175.92500
- East_Bounding_Coordinate: -173.40834
- North_Bounding_Coordinate: -15.39667
- South_Bounding_Coordinate: -21.27333
- What does it look like?
- Does the data set describe conditions during a particular time period?
- Beginning_Date: 16-Sep-1977
- Ending_Date: 02-Oct-1977
- 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: Tonga, Central Pacific
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:
-
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?
Jim Eade (Chief Scientist)
- 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: 30-Jan-1998 (process 1 of 2)
-
Navigation Data
01/30/1998 clint a-1t-77-cp.050
/bear/programs/ngdc/unrefngdc/unrefngdc
Integrated navigation (SINS) data
Person who carried out this activity:
- Date: 31-Oct-1998 (process 2 of 2)
-
Bathymetry Data
10/31/1998 /lion/a/a1t77cp/bath/a-1t-77-cp.320_050
/bear/programs/edit/automerge/automerge
Input was...
01/30/1998 clint a-1t-77-cp.320
/bear/programs/ngdc/unrefngdc/unrefngdc
Edited bathymetry data with corrected depths
Input was...
01/30/1998 clint a-1t-77-cp.050
/bear/programs/ngdc/unrefngdc/unrefngdc
Integrated navigation (SINS) data
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 (a-1t-77-cp.050 [SINS])
YYYYMMDDHHMMSST YYYYMMDDHHMMSST
197709162300000 197710020630000
YYYYMMDDHHMMSST YYYYMMDDHHMMSST
Bathymetry Data (a-1t-77-cp.320_050)
YYYYMMDDHHMMSST YYYYMMDDHHMMSST
197709170000239 197709172024089
197709172245069 197709180304059
197709180420059 197709181114550
197709181145550 197709182131570
197709190045039 197709190243259
197709190454410 197709190635460
197709190656229 197709192130039
197709200107350 197709201438329
197709201459470 197709202047520
197709202109049 197709202310159
197709212200340 197709212309169
197709220116029 197709221503079
197709221526329 197709231846269
197709232007229 197709232023300
197709232135380 197709242225400
197709242359320 197709251145009
197709251215159 197709260825460
197709261058580 197709271653119
197709271715389 197709272158380
197709290011460 197709290344590
197709290601059 197709291046279
197709291119570 197709300103410
197709300214259 197709300251340
197709300515480 197709301342009
197709301410451 197709302044039
197709302216329 197709302308490
197709302332310 197709302342069
197710010023539 197710010040530
197710010115229 197710010204300
197710010244420 197710010249209
197710010316209 197710010415419
197710010521209 197710010822179
197710010928269 197710011604039
197710011659029 197710011827500
197710012306320 197710020151039
197710020236370 197710020549099
197710020611480 197710020629079
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 A-1T-77-CP data set <http://walrus.wr.usgs.gov/infobank/a/a1t77cp/html/a-1t-77-cp.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>)
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