Metadata: Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Originator: Coastal and Marine Geology Program Publication_Date: 2013 Title: l1380np.m77t - MGD77 data file for Geophysical data from field activity L-13-80-NP in Northern Pacific from 11/18/1980 to 12/11/1980 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/samuel_p._lee/l1380np/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 DGPS navigation data was collected as part of field activity L-13-80-NP in Northern Pacific from 11/18/1980 to 12/11/1980, http://walrus.wr.usgs.gov/infobank/l/l1380np/html/l-13-80-np.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/l/l1380np/html/l-13-80-np.bath.html, http://walrus.wr.usgs.gov/infobank/l/l1380np/html/l-13-80-np.grav.html, and http://walrus.wr.usgs.gov/infobank/l/l1380np/html/l-13-80-np.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: 19801118 Ending_Date: 19801211 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -144.29501 East_Bounding_Coordinate: -122.39103 North_Bounding_Coordinate: 37.81569 South_Bounding_Coordinate: 33.57783 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:bf696d4a-50e9-4319-8cc5-c936745f0a48 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: North Pacific Ocean Place_Keyword: Northern Pacific Place_Keyword: Northern Pacific Ocean 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: Steve Eittreim (Chief Scientist) 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 (l-13-80-np.052 [SINS]) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >198011180334000 198011281550000 >198011281644000 198011281833000 >198011281934000 198011281934000 >198011282032000 198011282032000 >198011282126000 198011290058000 >198011290140000 198011290158000 >198011290304000 198012112325400 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Gravity Data (l-13-80-np.161_052) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >198011300638300 198012040019180 >198012040026180 198012071552420 >198012071559180 198012111621180 >198012111630000 198012112324420 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Magnetics Data (l-13-80-np.220_052) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >198011210338390 198011230010420 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >Bathymetry Data (l-13-80-np.335_052) >YYYYMMDDHHMMSST YYYYMMDDHHMMSST >198011221120000 198011221736000 >198011221757000 198011230115000 >198011230232000 198011230302000 >198011230328000 198011230331000 >198011230409000 198011230426000 >198011230515000 198011230515000 >198011230545000 198011230553000 >198011230619000 198011230636000 >198011230705000 198011230842000 >198011230922000 198011231130000 >198011231206000 198011231218000 >198011231240000 198011231313000 >198011231344000 198011231344000 >198011231441000 198011231441000 >198011231539000 198011231703000 >198011231725000 198011231731000 >198011231802000 198011231817000 >198011231847000 198011231916000 >198011231954000 198011232014000 >198011232036000 198011232047000 >198011232121000 198011240030000 >198011240140000 198011240253000 >198011240314000 198011240317000 >198011240355000 198011240410000 >198011240445000 198011242235000 >198011242301000 198011242301000 >198011242346000 198011250032000 >198011250119000 198011250533000 >198011250554000 198011250744000 >198011250810000 198011251821000 >198011251844000 198011261156000 >198011261227000 198011270052000 >198011270118000 198011270205000 >198011270236000 198011270301000 >198011270324000 198011270350000 >198011270424000 198011270515000 >198011270543000 198011270646000 >198011270718000 198011270718000 >198011270740000 198011270800000 >198011270827000 198011270827000 >198011270855000 198011270900000 >198011270938000 198011271001000 >198011271033000 198011271045000 >198011271108000 198011271946000 >198011272015000 198011282230000 >198011282331000 198011282355000 >198011290030000 198011290623000 >198011290720000 198011290730000 >198011290800000 198011290800000 >198011290830000 198011291320000 >198011291345000 198011291345000 >198011291435000 198011291435000 >198011291520000 198011300547000 >198011300630000 198011300630000 >198011300708000 198011300708000 >198011300743000 198011300835000 >198011300955000 198011301006000 >198011301035000 198011301124000 >198011301225000 198011301225000 >198011301252000 198011301252000 >198011301335000 198011302252000 >198011302314000 198011302332000 >198011302357000 198011302357000 >198012010029000 198012010047000 >198012010144000 198012010144000 >198012010220000 198012010220000 >198012010247000 198012010247000 >198012010310000 198012010310000 >198012010347000 198012010347000 >198012010412000 198012010412000 >198012010445000 198012010458000 >198012010523000 198012010523000 >198012010600000 198012010600000 >198012010632000 198012010632000 >198012010702000 198012010718000 >198012010742000 198012010949000 >198012011014000 198012020053000 >198012020123000 198012020123000 >198012020149000 198012020149000 >198012020221000 198012020255000 >198012020339000 198012020339000 >198012020410000 198012020432000 >198012020457000 198012020457000 >198012020526000 198012022124000 >198012022150000 198012022150000 >198012022222000 198012022342000 >198012030010000 198012030127000 >198012030148000 198012030339000 >198012030403000 198012030403000 >198012030425000 198012030425000 >198012030453000 198012030611000 >198012030639000 198012031022000 >198012031045000 198012031426000 >198012031457000 198012032341000 >198012040015000 198012040015000 >198012040042000 198012040156000 >198012040226000 198012040226000 >198012040259000 198012040352000 >198012040420000 198012040435000 >198012040525000 198012040525000 >198012040615000 198012040634000 >198012040701000 198012040746000 >198012040820000 198012040820000 >198012040843000 198012040855000 >198012040919000 198012040958000 >198012041033000 198012041033000 >198012041055000 198012041055000 >198012041125000 198012041125000 >198012041155000 198012041155000 >198012041221000 198012041221000 >198012041245000 198012041245000 >198012041320000 198012041320000 >198012041347000 198012041410000 >198012041520000 198012041520000 >198012041542000 198012041542000 >198012041607000 198012041607000 >198012041630000 198012041630000 >198012041715000 198012041720000 >198012041747000 198012041747000 >198012041811000 198012041811000 >198012041832000 198012050410000 >198012050435000 198012050440000 >198012050518000 198012050518000 >198012050620000 198012050620000 >198012050705000 198012050705000 >198012050730000 198012050730000 >198012050828000 198012050828000 >198012050900000 198012050952000 >198012051020000 198012051020000 >198012051051000 198012051051000 >198012051132000 198012051150000 >198012051215000 198012051215000 >198012051240000 198012051240000 >198012051315000 198012051315000 >198012051350000 198012051350000 >198012051430000 198012051430000 >198012051500000 198012051510000 >198012051535000 198012051535000 >198012051630000 198012051630000 >198012051710000 198012051929000 >198012051951000 198012051951000 >198012052020000 198012052020000 >198012052050000 198012052050000 >198012052123000 198012052123000 >198012052155000 198012052155000 >198012052229000 198012052229000 >198012052250000 198012052250000 >198012052315000 198012052315000 >198012060000000 198012060000000 >198012060032000 198012060032000 >198012060105000 198012060140000 >198012060214000 198012060251000 >198012060318000 198012060318000 >198012060340000 198012060447000 >198012060520000 198012060555000 >198012060624000 198012060741000 >198012060803000 198012060817000 >198012060845000 198012060915000 >198012060940000 198012061159000 >198012061220000 198012061250000 >198012061327000 198012061327000 >198012061353000 198012061353000 >198012061415000 198012061959000 >198012062023000 198012062324000 >198012070015000 198012070122000 >198012070143000 198012070252000 >198012070314000 198012070358000 >198012070433000 198012070514000 >198012070543000 198012070726000 >198012070807000 198012070807000 >198012070833000 198012071048000 >198012071110000 198012071145000 >198012071215000 198012071215000 >198012071246000 198012071246000 >198012071310000 198012071554000 >198012071617000 198012071647000 >198012071710000 198012071920000 >198012071945000 198012072020000 >198012072101000 198012072101000 >198012072125000 198012080100000 >198012080128000 198012080215000 >YYYYMMDDHHMMSST YYYYMMDDHHMMSST 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. > >11/26/85 EDM DUA0:[DATA.DRSDATA.NAVL.LD80NP]LD80NP.052; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 > Process_Date: 19960119 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/l/l1380np/grav/l-13-80-np.161_052 >/bear/programs/edit/automerge/automerge > >Input was... >Converted to time format with year at start. > >11/13/85 BARB DRS$DATA:[LD80NP.G]LD80NP.161; >DRB0:[DRS.REFMT]REFORMAT.EXE;4 > >Input was... >Converted to time format with year at start. > >11/26/85 EDM DUA0:[DATA.DRSDATA.NAVL.LD80NP]LD80NP.052; >DRB0:[DRS.REFMT]REFORMAT.EXE;5 > >time, lat, long, time(sec) to nearest nav fix, data values Process_Date: 19981031 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey (USGS) , Coastal and Marine Geology (CMG) Contact_Person: Carolyn H. Degnan Contact_Position: Geophysicist Contact_Address: Address_Type: mailing and physical address Address: USGS Pacific Coastal & Marine Science Center, 400 Natural Bridges Drive City: Santa Cruz State_or_Province: CA Postal_Code: 95060-5792 Country: USA Contact_Voice_Telephone: (831) 460-7452 Contact_Facsimile_Telephone: (831) 427-4748 Contact_Electronic_Mail_Address: infobank@octopus.wr.usgs.gov Process_Step: Process_Description: Magnetics Data >06/20/2012 carolyn l-13-80-np.220_052 > >Reprocessed using subroutines from Susan Macmillan's >IGRF SYNTHESIS PROGRAM http://www.ngdc.noaa.gov/IAGA/vmod/igrf11.f >with IGRF-11 coeffiecients integrated into the source code. >/infobank/programs/mag/magred11/magred11.for >Using geodetic coordinate system (Earth shape approximated by spheriod) >with altitude 0.0 km (for sea level). > >Input was... >10/31/1998 /tiger/l/l1380np/mag/l-13-80-np.200_052 >/bear/programs/edit/automerge/automerge > >Converted to time format with year at start. > >11/18/85 CAROLYN DRS$DATA:[LD80NP.M]LD80NP.200; >DRB0:[DRS.REFMT]REFORMAT.EXE;4 >was LC80NP._.MAGSA1 on TAM153 >was LC80NP200.DAT on MAM153 > >Converted to time format with year at start. > >11/26/85 EDM DUA0:[DATA.DRSDATA.NAVL.LD80NP]LD80NP.052; >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/l/l1380np/bath/l-13-80-np.335_052 >/bear/programs/edit/automerge/automerge > >Input was... >Converted to time format with year at start. > >09/11/85 BECKIE DUA0:[DATA.LD80NP.B]LD80NP.335; >DRB0:[DRS.BAT]BATRED.EXE;1 >This file was hand-digetized in 2-way traveltime(secs). > >Input was... >Converted to time format with year at start. > >11/26/85 EDM DUA0:[DATA.DRSDATA.NAVL.LD80NP]LD80NP.052; >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: Northern Pacific 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: l1380np.m77t Entity_Type_Definition: MGD77T single-beam bathymetry data file for L1380NP 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: 19801118 Range_Domain_Maximum: 19801211 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: 33.57783 Range_Domain_Maximum: 37.81569 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: -144.29501 Range_Domain_Maximum: -122.39189 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: 1.798 Range_Domain_Maximum: 7.715 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: 1337.4 Range_Domain_Maximum: 5824.3 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: 63 Range_Domain_Maximum: 63 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: 43399.3 Range_Domain_Maximum: 46078.3 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: -194.5 Range_Domain_Maximum: 217.3 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: 978749 Range_Domain_Maximum: 979999.9 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: -45 Range_Domain_Maximum: 94.8 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: -710.5 Range_Domain_Maximum: 159.9 Attribute_Units_of_Measure: milligals Overview_Description: Entity_and_Attribute_Overview: Bathymetry, gravity, magnetic, and navigation data for U.S. Geological Survey bathymetry survey L1380NP in MGD77T format. Entity_and_Attribute_Detail_Citation: Attributes are obtained from MGD77T data files created from the navigation gravity, magnetic, 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: 1.3 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://www.ngdc.noaa.gov/mgg/trk/trackline/samuel_p._lee/l1380np/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