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Global Gravity Grids, Geoid Height and Gravity Anomaly Profiles
 (MI_Metadata)
    fileIdentifier:  gov.noaa.ngdc.mgg.geophysics:G01146
    language:  eng; USA
    characterSet:  (MD_CharacterSetCode) utf8
    hierarchyLevel:  (MD_ScopeCode) dataset
    contact:  (CI_ResponsibleParty)
        individualName:  Brian Meyer
        organisationName:  DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
        contactInfo:  (CI_Contact)
            phone:  (CI_Telephone)
                voice:  303-497-6125
            address:  (CI_Address)
                electronicMailAddress:  Brian.Meyer@noaa.gov
        role:  (CI_RoleCode) pointOfContact
    dateStamp:  2014-11-20
    metadataStandardName:  ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
    metadataStandardVersion:  ISO 19115-2:2009(E)
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    identificationInfo:  (MD_DataIdentification)
        citation:  (CI_Citation)
            title:  Global Gravity Grids, Geoid Height and Gravity Anomaly Profiles
            date:  (CI_Date)
                date:  1986-01-01
                dateType:  (CI_DateTypeCode) publication
            edition:  First
            citedResponsibleParty:  (CI_ResponsibleParty)
                organisationName:  DOC/NOAA/NESDIS/NGDC - National Geophysical Data Center
                positionName:  User Services
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  303-497-6826
                        facsimile:  303-497-6513
                    address:  (CI_Address)
                        deliveryPoint:  National Geophysical Data Center NOAA, Mail Code E/GC, 325 Broadway
                        city:  Boulder
                        administrativeArea:  CO
                        postalCode:  80305-3328
                        country:  USA
                        electronicMailAddress:  ngdc.info@noaa.gov
                    hoursOfService:  8am-5pm, Monday through Friday
                role:  (CI_RoleCode) publisher
            citedResponsibleParty:  (CI_ResponsibleParty)
                organisationName:  DOC/NOAA/NESDIS/NGDC - National Geophysical Data Center
                positionName:  User Services
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  303-497-6826
                        facsimile:  303-497-6513
                    address:  (CI_Address)
                        deliveryPoint:  National Geophysical Data Center NOAA, Mail Code E/GC, 325 Broadway
                        city:  Boulder
                        administrativeArea:  CO
                        postalCode:  80305-3328
                        country:  USA
                        electronicMailAddress:  ngdc.info@noaa.gov
                    hoursOfService:  8am-5pm, Monday through Friday
                role:  (CI_RoleCode) originator
        abstract:  The entire collection of GEOSAT ERM (Nov.'86 - Dec. '89) data over land and ice regions is held at the National Geophysical Data Center (NGDC). These data will yield reasonable elevation values for land and ice regions of gently varying elevation. This data collection should not be used in regions of highly variable terrain. This satellite altimeter data base contains precise geoid and gravity anomaly profiles which were constructed from the average of 66 repeat cycles of GEOSAT. The data were developed by Professor David T. Sandwell at the University of California in San Diego. The data are contained in two files: (1) geo66asc.bin (2,383,232records) contains the ascending profiles which run southeast to northwest between 72S and 72N, and (2) geo66des.bin (2,397,888 records) contains all of the descending profiles. The dataparameters in addition to time and location are geoid height, gravity anomaly, and uncertainty in gravity anomaly. GEOSAT 66 was updated in 1994 to include the 3rd and last year of data. Thus 66 repeat cycles of data are included in the AVERAGE profile calculation. This satellite altimeter data base was contributed by NOS/Geoscience Laboratory and contains data collected during the first 18 months of the original "Geodetic Mission" of the U.S. Navy Geodetic Satellite (GEOSAT). These digital data are in the form of geophysical data records (GDRs) which are described in NOAA Technical Memorandum NOS NGS-46. The data are observed over a tightly spaced (typically 2 or 3 km at 60 degrees latitude) ground track pattern, and are global in coverage. The Southern Ocean data contained in this subset of the original Geodetic Mission were declassified in 1990 and received at NGDC in mid 1991. GEOSAT GRAVITY ANOMALY GRID SOUTH OF 30 SOUTH K.M. Marks, DC McAdoo, and W.H.F. Smith The Geosciences Laboratory, ocean and Earth Sciences (NOAA), has produced a digital gravity anomaly grid computed from recently declassified Geosat Geodetic Mission data, combined with Exact Repeat Mission data, for the region between 30 S and 72 S latitudes. The grid spacing is 0.04 degrees in latitude, and 0.05 degrees in longitude. The grid file, g30_UNIX.BIN, is a binary file of two-byte signed integers, stored in raster scan line (bands of Latitude) order. There are 1051 scan lines with the first line at 30 S and the last at 72 S latitude. Each line has 7201 integers with the first element at 0 E longitude and the last element at 360 E longitude. Values equal to 32767 indicate land areas where Geosat gravity is unavailable; all other values should be multiplied by 0.01 to yield Free-Air Gravity anomalies in mGals. Data in g30__UNIX.BIN are in "normal" byte order (Sun, Mac, etc.); the equivalent file G30_DOS.DOS is in "swapped" byte order (DEC, PC, etc.). RAPP92: This data base was compiled by Dr. Richard H. Rapp, Ohio State University and was received in April, 1993. The data base consists of the following: One file containing a 0.125 degree grid of free-air gravity anomalies and their standard deviations between +/- 72 degrees latitude. The anomalies in the ocean areas have been derived from a combination of Geos-3, Seasat and Geosat altimeter data and the ETOP05U bathymetric data. Although gravity values are given for land areas they have been, primarily, computed from the OSU91A potential coefficient model that is complete to degree 360. One file containing a 0.125 degree gridded mean sea surface (in the mean tide system), in the same geographic region as the data given in the file above. One file containing 30-minute x 30-minute mean gravity anomalies and geoid undulations (in the tide free system), derived form OSU's 0.125 degree gridded point anomalies and geoid undulations. One file containing 1 degree x 1 degree mean gravity anomalies and geoid undulations (in the tide free system), as derived from the original gridded point values. Principal gravity parameters include mean gravity anomaly and mean geoid undulations. The gravity anomaly computation uses the Geodetic Reference System 1967 (GRS 67) Theoretical Formula. The data are global in coverage where data are available. SANDWELL: The high density Geosat/GM altimeter data south of 30 S have finally arrived. In addition, ERS-1 has completed more than 6 cycles of its 35-day repeat track. These data provide a dramatically improved view of the marine gravity field. The files in this directory contain global marine gravity anomalies gridded on a Mercator projection (see Sandwell and Smith, EOS Trans. AGU, v. 73, p. 133, Fall 1992 AGU meeting supplement). The grid was derived from the following data sources: Seasat - Used in areas north of 30 S latitude. Profiles within 10 km of a Geosat/ERM track were excluded. Geosat/ERM - Average of 62 Geosat Exact Repeat Mission profiles. Geosat/GM - Recently declassified Geosat Geodetic mission data south of 30 S. ERS-1 - Fast delivery IGDR's obtained from Bob Cheney at NOAA. Six, 35-day repeat cycles were used in the grid. All of these data were gridded using the method described in: Sandwell, D.T., Antarctic marine gravity field from high-density satellite altimetry, Geophys. J. Int., v. 109, p. 437-448, 1992. The method was adapted to accommodate multiple satellite inclinations (Sandwell, D.T., A detailed view of the South Pacific from satellite altimetry, J. Geophys. Res., v. 89, p. 1089-1104, 1984). The gridded data are stored in an integer*2 format without any header or record information. world_grav.image - A 4224 by 7800 grid of 2-byte integers = 65894400 bytes. The gravity anomaly units are 0.1 milligal. The Mercator projected image spans longitudes of 0 E to 390 E and latitudes from 72.006 N to -72.006 N. The center of the upper left grid cell (i.e. the first integer in the file) is located at 71.998 N, 0.025 E. Longitudes increase with a 1/20 degree spacing. The center of the last integer in the file is located at -71.997 N, 389.975 E.
        purpose:  Provide Access to a WW Collection of Geoid and Gravity Anomaly Profiles
        status:  (MD_ProgressCode) underDevelopment
        pointOfContact:  (CI_ResponsibleParty)
            individualName:  Susan McLean
            organisationName:  DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
            contactInfo:  (CI_Contact)
                phone:  (CI_Telephone)
                    voice:  (303) 497-6478
                    facsimile:  (303) 497-6513
                address:  (CI_Address)
                    deliveryPoint:  NOAA/NESDIS/NGDC E/GC2 325 Broadway
                    city:  Boulder
                    administrativeArea:  CO
                    postalCode:  80305-3328
                    country:  USA
                    electronicMailAddress:  Susan.McLean@noaa.gov
                hoursOfService:  7:30 - 5:00 Mountain
                contactInstructions:  Contact Data Center
            role:  (CI_RoleCode) pointOfContact
        resourceMaintenance:  (MD_MaintenanceInformation)
            maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) unknown
        descriptiveKeywords:  (MD_Keywords)
            keyword:  EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Gravity
            keyword:  EARTH SCIENCE>SOLID EARTH>Geophysical Fields>Gravity Field
            keyword:  EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Gravitational Field
            keyword:  EARTH SCIENCE>LAND SURFACE
            keyword:  EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Reference Systems
            keyword:  EARTH SCIENCE>SOLID EARTH>Geodetics/Gravity>Geoid Properties
            type:  (MD_KeywordTypeCode) theme
            thesaurusName:  (CI_Citation)
                title:  NASA/Global Change Master Directory (GCMD) Earth Science Keywords
                date:  (CI_Date)
                    date:  2007-04
                    dateType:  (CI_DateTypeCode) revision
                edition:  Version 6.0.0.0.0
                editionDate:  2007-04
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  NASA/GSFC/SED/ESD/GCDC/GCMD > Global Change Master Directory, Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: http://gcmd.gsfc.nasa.gov/Resources/valids/archives/keyword_list.html
                            protocol:  http
                            applicationProfile:  web browser
                            name:  GCMD Keywords, Version 6.0.0.0.0
                            description:  Thesuarus for earth science keywords and associated directories hosted and maintained by NASA.
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) resourceProvider
        descriptiveKeywords:  (MD_Keywords)
            keyword:  Derived Height
            keyword:  Exact Repeat Mission
            keyword:  Geodetic Mission
            keyword:  Free-Air Anomaly
            keyword:  SEASAT
            keyword:  GEOS3
            keyword:  GEOSAT
            keyword:  Sea Surface
            type:  (MD_KeywordTypeCode) theme
            thesaurusName:  (CI_Citation)
                title:  Uncontrolled Keywords
                date:
        descriptiveKeywords:  (MD_Keywords)
            keyword:  Global
            type:  (MD_KeywordTypeCode) place
            thesaurusName:  (CI_Citation)
                title:  NASA/GCMD Location Keywords
                date:
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  NASA
                    positionName:  GCMD User Support Office
                    contactInfo:  (CI_Contact)
                        address:  (CI_Address)
                            electronicMailAddress:  gcmduso@gcmd.gsfc.nasa.gov
                        onlineResource:  (CI_OnlineResource)
                            linkage: http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso
                            name:  GCMD Feedback Form
                            description:  Have a Comment for the GCMD?
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) custodian
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: http://gcmd.nasa.gov/learn/keyword_list.html
                            name:  GCMD Keywords Page
                            description:  This page describes the NASA GCMD Keywords, how to reference those keywords and provides download instructions.
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) custodian
        resourceConstraints:  (MD_Constraints)
            useLimitation:  While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
        resourceConstraints:  (MD_LegalConstraints)
            useConstraints:  (MD_RestrictionCode) otherRestrictions
            otherConstraints:  Use Constraints: None
        resourceConstraints:  (MD_LegalConstraints)
            accessConstraints:  (MD_RestrictionCode) otherRestrictions
            otherConstraints:  Access Constraints: None
        language:  eng; USA
        topicCategory:  (MD_TopicCategoryCode) geoscientificInformation
        extent:  (EX_Extent)
            geographicElement:  (EX_GeographicBoundingBox)
                westBoundLongitude:  -180.000000
                eastBoundLongitude:  180.000000
                southBoundLatitude:  -90.000000
                northBoundLatitude:  90.000000
            temporalElement:  (EX_TemporalExtent)
                extent:
                  TimePeriod:
                    beginPosition:  1990-01-01
                    endPosition:
        supplementalInformation:  Formerly FE 1038, 981, 1068, 1069, 1073, 1107
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    distributionInfo:  (MD_Distribution)
        distributionFormat:  (MD_Format)
            name:  ASCII
            version:
        distributor:  (MD_Distributor)
            distributorContact:  (CI_ResponsibleParty)
                organisationName:  DOC/NOAA/NESDIS/NGDC - National Geophysical Data Center
                positionName:  User Services
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  303-497-6826
                        facsimile:  303-497-6513
                    address:  (CI_Address)
                        deliveryPoint:  National Geophysical Data Center NOAA, Mail Code E/GC, 325 Broadway
                        city:  Boulder
                        administrativeArea:  CO
                        postalCode:  80305-3328
                        country:  USA
                        electronicMailAddress:  ngdc.info@noaa.gov
                    hoursOfService:  8am-5pm, Monday through Friday
                role:  (CI_RoleCode) distributor
            distributionOrderProcess:  (MD_StandardOrderProcess)
                fees:  Depends on the Data Set
                orderingInstructions:  Ordering Instructions: Price information is available upon request. Custom Order Process: Contact Data Center
                turnaround:  4 Days
        transferOptions:  (MD_DigitalTransferOptions)
            transferSize:
              Real:  600.000000
            onLine:  (CI_OnlineResource)
                linkage: http://www.ngdc.noaa.gov/mgg/fliers/se-0703.html
            onLine:  (CI_OnlineResource)
                linkage: http://www.ngdc.noaa.gov/mgg/gravity/
        transferOptions:  (MD_DigitalTransferOptions)
            offLine:  (MD_Medium)
                name:  (MD_MediumNameCode) cdRom
                mediumFormat:  (MD_MediumFormatCode) iso9660
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    metadataMaintenance:  (MD_MaintenanceInformation)
        maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) annually
        dateOfNextUpdate:  2011-04-23
        maintenanceNote:  This metadata was automatically generated from the Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata standard (version FGDC-STD-012-2002) using the 2012-08-08 version of the FGDC RSE to ISO 19115-2 transform.
        maintenanceNote:  Translated from FGDC 2012-10-10T10:31:50.265-06:00
        maintenanceNote:  Last Metadata Review Date: 2014-11-20
        contact:  (CI_ResponsibleParty)
            individualName:  Brian Meyer
            organisationName:  DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
            contactInfo:  (CI_Contact)
                phone:  (CI_Telephone)
                    voice:  303-497-6125
                address:  (CI_Address)
                    electronicMailAddress:  Brian.Meyer@noaa.gov
            role:  (CI_RoleCode) pointOfContact