u471cb.m77t - MGD77 data file for Geophysical data from field activity UGEOLEG_4 (U-4-71-CB) in Venezuela, Caribbean Sea from 08/18/1971 to 10/01/1971

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Originator: Coastal and Marine Geology Program
Publication_Date: 2013
Title:
u471cb.m77t - MGD77 data file for Geophysical data from field activity UGEOLEG_4 (U-4-71-CB) in Venezuela, Caribbean Sea from 08/18/1971 to 10/01/1971
Geospatial_Data_Presentation_Form: tab-delimited ASCII text files
Publication_Information:
Publication_Place: Menlo Park, CA
Publisher: U.S. Geological Survey
Online_Linkage:
http://www.ngdc.noaa.gov/mgg/trk/trackline/united_geo_i/u471cb/mgd77/
Larger_Work_Citation:
Citation_Information:
Originator: Wm. Clinton Steele
Originator: Carolyn H. Degnan
Originator: Gary B. Deeter
Originator: Jean A. Riordan
Publication_Date: 1980
Title:
DESCRIPTION OF MARINE GEOPHYSICAL DATA COLLECTED BY THE U.S. GEOLOGICAL SURVEY AND HOW TO OBTAIN IT
Edition: 1.0
Geospatial_Data_Presentation_Form: Digital Document
Series_Information:
Series_Name: U.S. Geological Survey Open File Report
Issue_Identification: 167
Publication_Information:
Publication_Place: Menlo Park, CA
Publisher: U.S. Geological Survey
Online_Linkage: http://pubs.usgs.gov/of/1989/0167/report.pdf
Description:
Abstract:
Single-beam bathymetry,gravity, and magnetic data along with transit satellite navigation data was collected as part of field activity UGEOLEG_4 (U-4-71-CB) in Venezuela, Caribbean Sea from 08/18/1971 to 10/01/1971, http://walrus.wr.usgs.gov/infobank/u/u471cb/html/u-4-71-cb.meta.html
These data are reformatted from space-delimited ASCII text files located in the Coastal and Marine Geology Program (CMGP) InfoBank field activity catalog at http://walrus.wr.usgs.gov/infobank/u/u471cb/html/u-4-71-cb.bath.html http://walrus.wr.usgs.gov/infobank/u/u471cb/html/u-4-71-cb.grav.html and http://walrus.wr.usgs.gov/infobank/u/u471cb/html/u-4-71-cb.mag.html into MGD77T format provided by the NOAA's National Geophysical Data Center(NGDC). The MGD77T format includes a header (documentation) file (.h77t) and a data file (.m77t). More information regarding this format can be found in the publication listed in the Cross_reference section of this metadata file.
Purpose:
These data and information are intended for science researchers,students, policy makers, and general public. These data are not to be used for navigation purposes. The data are reformatted into MGD77T standard format for inclusion into NOAA's NGDC geophysical database. From there the data will be made available to GeoMapApp ( http://www.geomapapp.org/ ) and Virtual Ocean ( http://www.virtualocean.org/ ) Earth-browsing software. Access to the data is also provided via the USGS Coastal and Marine Geoscience Data System ( http://cmgds.marine.usgs.gov/ ).
Supplemental_Information:
The navigation data are digitally collected using a Satellite Integrated Navigation (SINS) system. The system is a space-based satellite navigation maintained by the United States government and is accessible using a satellite receiver. This system provides navigational accuracy of approximately 200 m.The Data Acquistion, Processing, and Storage (DAPS) group performs a number of processing steps to the navigation data once it is collected which can vary by cruise. These steps are outlined within the header information in each individual digital navigation (.05x) space-delimited ASCII data file. The header information rows are indicated by lines beginning with the character "!". There is no information on how the single-beam bathymetry, gravity, and magnetic data were collected. For each data gathering cruise leg, the available data in the following categories are forwarded to NGDC: navigation, gravity, magnetics, bathymetry, and seismic shot points. The available data for each cruise leg are re-formatted and combined into the Marine Geophysical Data Exchange Format (MGD77) and into the internal NGDC SEIS-NAV format by USGS using several USGS developed FORTRAN programs.The FORTRAN programs sample the navigation to every integer minute of the cruise. When necessary, the latitudes and longitudes are linearly interpolated. If the time between the actual navigation fixes exceeds five minutes, no data are included in the MGD77 file.To build the MGD77 file, gravity, magnetics, and bathymetry are added to this sampled navigation. When necessary, gravity, magnetics, and bathymetry data are linearly interpolated if the time between the actual data samples does not exceed five minutes. If a time gap exceeds this, the data are not reported.The navigation data are merged with the seismic shot point data in a SEIS- NAV format file. For this file, navigation data are interpolated for each shot point. Both types of files are written to magnetic tape and sent to NGDC.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19710818
Ending_Date: 19711001
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -70.32740
East_Bounding_Coordinate: -61.72080
North_Bounding_Coordinate: 18.59110
South_Bounding_Coordinate: 10.46670
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:de3052c5-2eba-41f9-bb38-2ebca20095b3
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificinformation
Theme_Keyword: oceans
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Marine Geology
Theme_Keyword: Marine Geophysics
Theme_Keyword: Marine Gravity Field
Theme_Keyword: Marine Magnetic Field
Theme_Keyword: Magnetic Anomalies
Theme_Keyword: Bathymetry
Theme_Keyword: Water Depth
Theme_Keyword: Seafloor Topography
Theme:
Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: distributions
Theme_Keyword: bathymetry and elevation
Theme:
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: single-beam echo sounder
Theme_Keyword: gravimetry
Theme_Keyword: magnetic field observations
Theme_Keyword: marine geophysics
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: single-beam echo sounder
Theme_Keyword: bathymetry measurement
Theme_Keyword: bathymetry
Theme_Keyword: gravimeter measurement
Theme_Keyword: magnetometer measurement
Theme_Keyword: marine geophysics
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Caribbean Sea
Place_Keyword: Lesser Antilles
Place_Keyword: Venezuela, Caribbean Sea
Access_Constraints: None. These data are held in the public domain.
Use_Constraints:
This information is not intended for navigational purposes. Read and fully comprehend the metadata prior to data use. Uses of these data should not violate the spatial resolution of the data. Where these data are used in combination with other data of different resolution, the resolution of the combined output will be limited by the lowest resolution of all the data. Acknowledge the U.S. Geological Survey in products derived from these data. Share data products developed using these data with the U.S. Geological Survey.This database has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.Although this Federal Geographic Data Committee-compliant metadata file is intended to document these data in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Gregory K. Miller
Contact_Organization: U.S. Geological Survey
Contact_Position: Physical Scientist
Contact_Address:
Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: (727) 803-8747, ext. 3020
Contact_Electronic_Mail_Address: gmiller@usgs.gov
Data_Set_Credit: Eli Silver (Chief Scientist, USGS Western Region)
Cross_Reference:
Citation_Information:
Originator:
Hittelman, Allen M., Groman, Robert C., Haworth, Richard T., Holcombe, Troy L., McHendrie, Graig, Smith, Stuart M., and Metzger, Dan R.
Publication_Date: 2010
Title: The marine geophysical data exchange format - MGD77 / MGD77T
Publication_Information:
Publication_Place: Boulder, CO
Publisher:
National Geophysical Data Center, National Oceanic and Atmospheric Administration
Other_Citation_Details: 25 p.
Online_Linkage: http://www.ngdc.noaa.gov/mgg/dat/geodas/docs/mgd77.pdf
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The validity or accuracy of bathymetry and navigation data is highly qualitative and depends on equipment and operating condition variables. Data quality is unknown, MGD77T files were formatted from InfoBank files identified as best available version.
Logical_Consistency_Report:
This data set is from one field activity with unknown instrument calibrations. Processed bathymetric depths were spot checked based on latitude and longitude against the Global Multi-Resolution Topography (GMRT) grid within GeoMapApp to ensure reasonable values.
Completeness_Report:
Start and end date/times of data >Navigation Data (u-4-71-cb.050 [SINS]) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197108182340000 197108211520000 >197109051840000 197109100000180 >197109100100000 197109100225000 >197109100241300 197109120930360 >197109120940480 197109131151060 >197109170400000 197109242030000 >197109252300000 197110011620000 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Gravity Data (u-4-71-cb.161_050) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197108190000000 197108192140000 >197108192200000 197108211520000 >197109051840000 197109060110000 >197109060125000 197109061550000 >197109061605000 197109061755000 >197109061830000 197109071205000 >197109071225000 197109071500000 >197109071515000 197109072110000 >197109072140000 197109081200000 >197109081220000 197109082250000 >197109082305000 197109091140000 >197109091200000 197109091200000 >197109091215000 197109091215000 >197109091235000 197109091235000 >197109091250000 197109091250000 >197109091315000 197109092215000 >197109092250000 197109092355000 >197109100105000 197109100225000 >197109100245000 197109100305000 >197109100325000 197109101225000 >197109101245000 197109101710000 >197109101730000 197109110100000 >197109110120000 197109120840000 >197109170400000 197109190250000 >197109190310000 197109210630000 >197109210650000 197109211920000 >197109211940000 197109212010000 >197109212030000 197109240210000 >197109240230000 197109242030000 >197109252300000 197109282100000 >197109282115000 197109300755000 >197109300815000 197110011500000 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Magnetics Data (u-4-71-cb.220_050) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >197108190450120 197108190450120 >197108190521000 197108190700120 >197108190721000 197108190950180 >197108191011060 197108191130480 >197108191151480 197108191151480 >197108191330420 197108200920480 >197108200941180 197108211320240 >197109051951360 197109052050060 >197109052110360 197109081809550 >197109081834460 197109081847110 >197109081914060 197109092154420 >197109092233520 197109092358160 >197109100102450 197109100354400 >197109100415050 197109120748400 >197109120815160 197109131149070 >197109170356550 197109212131120 >197109212151300 197109221441180 >197109221540180 197109241720420 >197109260250480 197109261640480 >197109261701180 197109262241120 >197109262320360 197109271510480 >197109271531240 197109271721060 >197109271741420 197110011540420 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Bathymetry Data (u-4-71-cb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
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: Unspecified
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: Unspecified
Lineage:
Process_Step:
Process_Description:
Navigation Data >Converted to time format with year at start. > >02/11/86 KAYE DUA0:[DATA.U471CB.N]U471CB.050; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 >
Process_Date: 19951215
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG)
Contact_Person: Carolyn H. Degnan
Contact_Position: Geophysicist
Contact_Address:
Address_Type: mailing and physical address
Address:
USGS Pacific Coastal & Marine Science Center, 400 Natural Bridges Drive
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060-5792
Country: USA
Contact_Voice_Telephone: (831) 460-7452
Contact_Facsimile_Telephone: (831) 427-4748
Contact_Electronic_Mail_Address: infobank@octopus.wr.usgs.gov
Process_Step:
Process_Description:
Gravity Data >10/31/1998 /tiger/u/u471cb/grav/u-4-71-cb.161_050 >/bear/programs/edit/automerge/automerge > >Input was... >Converted to time format with year at start. > >04/22/86 CLINT DUA0:[DATA.U471CB]U471CB.160; >DRB0:[DRS.NGDC]UNREFNGDC.EXE; >This file came from an NGDC file called U471CB.999. >Start time is 231/1610 and ends at 274/1500. > >03/07/86 BARB DUA0:[DATA.U471CB]U471CB.160 >DRB0:[DRS.REFMT]REFORMAT.EXE;5 > >Input was... >Converted to time format with year at start. > >02/11/86 KAYE DUA0:[DATA.U471CB.N]U471CB.050; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 > >time, lat, long, time(sec) to nearest nav fix, data values
Process_Date: 19981031
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG)
Contact_Person: Carolyn H. Degnan
Contact_Position: Geophysicist
Contact_Address:
Address_Type: mailing and physical address
Address:
USGS Pacific Coastal & Marine Science Center, 400 Natural Bridges Drive
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060-5792
Country: USA
Contact_Voice_Telephone: (831) 460-7452
Contact_Facsimile_Telephone: (831) 427-4748
Contact_Electronic_Mail_Address: infobank@octopus.wr.usgs.gov
Process_Step:
Process_Description:
Magnetics Data >06/20/2012 carolyn u-4-71-cb.220_050 > >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/u/u471cb/mag/u-4-71-cb.200_050 >/bear/programs/edit/automerge/automerge > >Converted to time format with year at start. > >03/10/86 CAROLYN DRS$DATA:[U471CB.M]U471CB.200; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 >was U471CB.220 from 71BKUP > >03/22/85 CAROLYN USR$DISK:[DRS.DATA.U4.M]U471CB.220; >USR$DISK:[DRS.REFMT]REFORMAT.EXE;3 > >Converted to time format with year at start. > >02/11/86 KAYE DUA0:[DATA.U471CB.N]U471CB.050; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 > >time, lat, long, time(sec) to nearest nav fix, data values
Process_Date: 20120620
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG)
Contact_Person: Carolyn H. Degnan
Contact_Position: Geophysicist
Contact_Address:
Address_Type: mailing and physical address
Address:
USGS Pacific Coastal & Marine Science Center, 400 Natural Bridges Drive
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060-5792
Country: USA
Contact_Voice_Telephone: (831) 460-7452
Contact_Facsimile_Telephone: (831) 427-4748
Contact_Electronic_Mail_Address: infobank@octopus.wr.usgs.gov
Process_Step:
Process_Description:
Bathymetry Data >10/31/1998 /tiger/u/u471cb/bath/u-4-71-cb.325_050 >/bear/programs/edit/automerge/automerge > >Input was... >Converted to time format with year at start. > >03/07/86 BECKIE DUA0:[DATA.U471CB]U471CB.325; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 > >Input was... >Converted to time format with year at start. > >02/11/86 KAYE DUA0:[DATA.U471CB.N]U471CB.050; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 > >time, lat, long, time(sec) to nearest nav fix, data values
Process_Date: 19981031
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG)
Contact_Person: Carolyn H. Degnan
Contact_Position: Geophysicist
Contact_Address:
Address_Type: mailing and physical address
Address:
USGS Pacific Coastal & Marine Science Center, 400 Natural Bridges Drive
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060-5792
Country: USA
Contact_Voice_Telephone: (831) 460-7452
Contact_Facsimile_Telephone: (831) 427-4748
Contact_Electronic_Mail_Address: infobank@octopus.wr.usgs.gov
Process_Step:
Process_Description:
MGD77 file creation - The available data for each cruise leg are re-formatted and combined into the Marine Geophysical Data Exchange Format (MGD77) and into the internal NGDC SEIS-NAV format by USGS using several USGS developed FORTRAN programs.The FORTRAN programs sample the navigation to every integer minute of the cruise. When necessary, the latitudes and longitudes are linearly interpolated. If the time between the actual navigation fixes exceeds five minutes, no data are included in the MGD77 file.To build the MGD77 file, gravity, magnetics, and bathymetry are added to this sampled navigation. When necessary, gravity, magnetics, and bathymetry data are linearly interpolated if the time between the actual data samples does not exceed five minutes. If a time gap exceeds this, the data are not reported.The navigation data are merged with the seismic shot point data in a SEIS- NAV format file. For this file, navigation data are interpolated for each shot point. Both types of files are written to magnetic tape and sent to NGDC.
Process_Date: 20120620
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey (USGS), Coastal and Marine Geology (CMG)
Contact_Person: Carolyn H. Degnan
Contact_Position: Geophysicist
Contact_Address:
Address_Type: mailing and physical address
Address:
USGS Pacific Coastal & Marine Science Center, 400 Natural Bridges Drive
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060-5792
Country: USA
Contact_Voice_Telephone: (831) 460-7452
Contact_Facsimile_Telephone: (831) 427-4748
Contact_Electronic_Mail_Address: infobank@octopus.wr.usgs.gov
Process_Step:
Process_Description:
Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog.
Process_Date: 20170201
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Alan O. Allwardt
Contact_Position: Contractor -- Information Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Contact_Voice_Telephone: 831-460-7551
Contact_Facsimile_Telephone: 831-427-4748
Contact_Electronic_Mail_Address: aallwardt@usgs.gov
Process_Step:
Process_Description:
Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed.
Process_Date: 20201019
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Spatial_Data_Organization_Information:
Indirect_Spatial_Reference: Venezuela, Caribbean Sea
Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.25722210100002
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: u471cb.m77t
Entity_Type_Definition:
MGD77T single-beam bathymetry, gravity, and magnetic data file for U471CB
Entity_Type_Definition_Source:
NOAA's National Geophysical Data Center, See Hittelman and others (2010) Cross_Reference section above for details about the MGD77T format and citation information.
Attribute:
Attribute_Label: SURVEY_ID
Attribute_Definition: Survey identifier supplied by the contributing organization
Attribute_Definition_Source: NGDC
Attribute_Domain_Values:
Unrepresentable_Domain:
This identifier varies in format and is supplied by the contributing organization
Attribute:
Attribute_Label: TIMEZONE
Attribute_Definition: Time-zone correction
Attribute_Definition_Source: NGDC
Attribute_Domain_Values:
Unrepresentable_Domain: In our datasets, no correction was applied. All values equal 0.
Attribute:
Attribute_Label: DATE
Attribute_Definition: YYYYMMDD
Attribute_Definition_Source: NGDC
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 19710818
Range_Domain_Maximum: 19711001
Attribute_Units_of_Measure: Year, month, day
Attribute:
Attribute_Label: TIME
Attribute_Definition: Time
Attribute_Definition_Source: NGDC
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 2359
Attribute_Units_of_Measure: hours and decimal minutes
Attribute:
Attribute_Label: LAT
Attribute_Definition: Latitude
Attribute_Definition_Source: World Geodetic System 1984 Geographic Coordinate System
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 10.46687
Range_Domain_Maximum: 18.5911
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: LON
Attribute_Definition: Longitude
Attribute_Definition_Source: World Geodetic System 1984 Geographic Coordinate System
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -70.3274
Range_Domain_Maximum: -61.7208
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: POS_TYPE
Attribute_Definition: Indicates how lat/lon was obtained
Attribute_Definition_Source: NGDC
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 3
Attribute_Units_of_Measure: 1 = observed fix, 3 = interpolated fix, nil = unspecified
Attribute:
Attribute_Label: BAT_TTIME
Attribute_Definition: Bathymetry, 2-way travel time
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.04
Range_Domain_Maximum: 7.23
Attribute_Units_of_Measure: seconds
Attribute:
Attribute_Label: CORR_DEPTH
Attribute_Definition: Bathymetry, corrected depth
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 31
Range_Domain_Maximum: 5535
Attribute_Units_of_Measure: decimal meters
Attribute:
Attribute_Label: BAT_CPCO
Attribute_Definition:
Bathymetric Correction code - details the procedure used for determining the sound velocity correction to depth
Attribute_Definition_Source: NGDC
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 59
Range_Domain_Maximum: 59
Attribute_Units_of_Measure:
01-55 Matthews' Zones with zone , 59 Matthews' Zones, no zone specified, 60 S. Kuwahara Formula, 61 Wilson Formula, 62 Del Grosso Formula, 63 Carter's Tables, 88 Other (see Add. Doc.), 97 Computed using 1500 meters/sec, 98 Unknown if Corrected, 99 Unspecified
Attribute:
Attribute_Label: BAT_TYPCO
Attribute_Definition:
Bathymetry type code - indicates how the bathymetric value was obtained
Attribute_Definition_Source: NGDC
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 3
Attribute_Units_of_Measure:
1 - Observed, 3 - Interpolated (Header Seq. 12), 9 - Unspecified
Attribute:
Attribute_Label: MAG_TOT
Attribute_Definition: Magnetics total field - 1st sensor
Attribute_Definition_Source: NGDC
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 36860.1
Range_Domain_Maximum: 47577.9
Attribute_Units_of_Measure: gammas
Attribute:
Attribute_Label: MAG_RES
Attribute_Definition: Magnetics residual field field
Attribute_Definition_Source: NGDC
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -595.4
Range_Domain_Maximum: 4721.9
Attribute_Units_of_Measure: gammas
Attribute:
Attribute_Label: GRA_OBS
Attribute_Definition: Observed gravity
Attribute_Definition_Source: NGDC
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 978454.6
Range_Domain_Maximum: 978662.4
Attribute_Units_of_Measure: milligals
Attribute:
Attribute_Label: EOTVOS
Attribute_Definition:
EOTVOS correction - E = 7.5 V cos(phi) * sin(alpha) + 0.0042 V*V
Attribute_Definition_Source: NGDC
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -67.5
Range_Domain_Maximum: -3.2
Attribute_Units_of_Measure: milligals
Attribute:
Attribute_Label: FREEAIR
Attribute_Definition: Free-air Anomaly = G(observed) minus G(theoretical)
Attribute_Definition_Source: NGDC
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -391.4
Range_Domain_Maximum: 92.6
Attribute_Units_of_Measure: milligals
Overview_Description:
Entity_and_Attribute_Overview:
Bathymetry, gravity, magnetic and navigation data for U.S. Geological Survey bathymetry survey U471CB in MGD77T format.
Entity_and_Attribute_Detail_Citation:
Attributes are obtained from MGD77T data files created from the navigation and bathymetry best files. MGD77T is the standard, defined data format used for geophysical data in the National Geophysical Data Center. See Cross_Reference section above for citation details.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: 345 Middlefield Road MS 999
City: Menlo Park
State_or_Province: CA
Postal_Code: 94025
Country: USA
Contact_Voice_Telephone: (650) 329-5078
Contact_Facsimile_Telephone: (650) 329-5190
Resource_Description: Downloadable Data
Distribution_Liability:
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: MGD77t
Format_Version_Number: 10
Format_Specification: MGD77
Format_Information_Content: tab-delimited ASCII text files.
Transfer_Size: 2.9
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.ngdc.noaa.gov/mgg/trk/trackline/united_geo_i/u471cb/mgd77/
Access_Instructions: Data are available for download on the World Wide Web (WWW).
Fees: None
Metadata_Reference_Information:
Metadata_Date: 20201019
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Gregory K. Miller
Contact_Organization: U.S. Geological Survey
Contact_Position: Physical Scientist
Contact_Address:
Address_Type: mailing and physical address
Address: U.S. Geological Survey, 600 Fourth Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: (727) 803-8747, ext. 3020
Contact_Electronic_Mail_Address: gmiller@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/SeriesReports/OFR/OFR_89-167/795.html>
Generated by mp version 2.9.50 on Tue Sep 21 18:17:53 2021