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NOAA/NGS Continuously Operating Reference Station (CORS)
 (MI_Metadata)
    fileIdentifier:  gov.noaa.ngdc.stp.terrestrial:G10019
    language:  eng; USA
    characterSet:  (MD_CharacterSetCode) utf8
    hierarchyLevel:  (MD_ScopeCode) dataset
    contact:  (CI_ResponsibleParty)
        individualName:  Francine S. Coloma
        organisationName:  DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
        contactInfo:  (CI_Contact)
            phone:  (CI_Telephone)
                voice:  303 497-3692
                facsimile:  303 497-6513
            address:  (CI_Address)
                deliveryPoint:  325 Broadway
                city:  Boulder
                administrativeArea:  CO
                postalCode:  80305
                country:  USA
                electronicMailAddress:  Francine.Coloma@noaa.gov
            hoursOfService:  9:00 - 5:00 Mountain
        role:  (CI_RoleCode) pointOfContact
    dateStamp:  2014-06-20
    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:  NOAA/NGS Continuously Operating Reference Station (CORS)
            date:  (CI_Date)
                date:  1994-04-22
                dateType:  (CI_DateTypeCode) publication
            identifier:  (MD_Identifier)
                code:  NOAA/NGS CORS
            citedResponsibleParty:  (CI_ResponsibleParty)
                organisationName:  DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S. Department of Commerce
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  (301) 713-3191
                    address:  (CI_Address)
                        deliveryPoint:  1315 East West Highway, N/NGS3
                        deliveryPoint:  SSMC-3 8142
                        city:  Silver Spring
                        administrativeArea:  MD
                        postalCode:  20910
                        country:  USA
                role:  (CI_RoleCode) originator
        abstract:  The National Geodetic Survey (NGS), an office of NOAA's National Ocean Service, manages a network of Continuously Operating Reference Stations (CORS) that provide Global Navigation Satellite System (GNSS) data consisting of carrier phase and code range measurements in support of three dimensional positioning, meteorology, space weather, and geophysical applications throughout the United States, its territories, and a few foreign countries. Surveyors, GIS users, engineers, scientists, and the public at large that collect GPS data can use CORS data to improve the precision of their positions. CORS enhanced post-processed coordinates approach a few centimeters relative to the National Spatial Reference System, both horizontally and vertically. The CORS network is a multi-purpose cooperative endeavor involving government, academic, and private organizations. The sites are independently owned and operated. Each agency shares their data with NGS, and NGS in turn analyzes and distributes the data free of charge. As of March 2014, the CORS network contains almost 2000 stations, contributed by over 200 different organizations, and the network continues to expand. The National Geophysical Data Center (NGDC) is the designated archive of the NGS CORS data set. NGDC utilizes NOAA's Comprehensive Large Array-data Stewardship System (CLASS) infrastructure to archive and distribute CORS data.
        purpose:  The CORS data set enables users to attain centimeter-level positioning for points of interest and can be used to measure crustal motion, moisture content for the lower atmosphere, and total electronic content in the upper atmosphere. NGS publishes coordinates for CORS in several reference frames. This includes the current global reference frame from the International GNSS Service (IGS), and with respect to the National Spatial Reference System (NSRS) realizations of the North American Datum of 1983 (NAD 83) as defined by NGS. Reference frames are updated periodically as according to policy: http://geodesy.noaa.gov/INFO/Policy/CORS-coordinate-policyv4_20Dec2011.pdf
        credit:  NGS coordinates a network of CORS stations from approximately 200 organizations such as federal, state, and local governments, academia, the private sector, and international groups.
        status:  (MD_ProgressCode) ongoing
        pointOfContact:  (CI_ResponsibleParty)
            organisationName:  DOC/NOAA/NOS/NGS > National Geodetic Survey, NOS, NOAA, U.S. Department of Commerce
            contactInfo:  (CI_Contact)
                phone:  (CI_Telephone)
                    voice:  (301) 713-3191
                address:  (CI_Address)
                    deliveryPoint:  1315 East West Highway N/NGS2
                    city:  Silver Spring
                    administrativeArea:  MD
                    postalCode:  20910
                    country:  USA
                    electronicMailAddress:  ngs.cors@noaa.gov
                hoursOfService:  9:00 - 5:00 Eastern
            role:  (CI_RoleCode) pointOfContact
        resourceMaintenance:  (MD_MaintenanceInformation)
            maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) daily
        graphicOverview:  (MD_BrowseGraphic)
            fileName: http://www.ngdc.noaa.gov/image/cors_main765x320.jpg
            fileDescription:  NGDC Archive of NGS CORS data
        descriptiveKeywords:  (MD_Keywords)
            keyword:  EARTH SCIENCE > Solid Earth > Geodetics
            keyword:  EARTH SCIENCE > Solid Earth > Geodetics > Coordinate Reference Systems
            keyword:  EARTH SCIENCE > Solid Earth > Geodetics > Coordinate Reference Systems > Country/Regional Coordinate Reference System
            keyword:  EARTH SCIENCE > Solid Earth > Geodetics > Coordinate Reference Systems > Global Coordinate Reference System
            keyword:  EARTH SCIENCE > Solid Earth > Geodetics > Ellipsoid Characteristics
            keyword:  EARTH SCIENCE > Solid Earth > Geodetics > Geoid Characteristics
            keyword:  EARTH SCIENCE > Solid Earth > Geodetics > Control Surveys
            keyword:  EARTH SCIENCE > Solid Earth > Geodetics > Crustal Motion
            keyword:  EARTH SCIENCE > Solid Earth > Geomorphic Landforms/Processes
            keyword:  EARTH SCIENCE > Solid Earth > Gravity/Gravitational Field
            type:  (MD_KeywordTypeCode) theme
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                title:  NASA/GCMD Science Keywords
                date:
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                    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
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                        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
        descriptiveKeywords:  (MD_Keywords)
            keyword:  NOAA > National Geodetic Survey (NGS) > Continuously Operating Reference Station (CORS)
            type:  (MD_KeywordTypeCode) project
            thesaurusName:  (CI_Citation)
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                    positionName:  GCMD User Support Office
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                            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)
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                        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
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        descriptiveKeywords:  (MD_Keywords)
            keyword:  GPS > Global Positioning System Satellites
            keyword:  NAVSTAR > NAVSTAR Global Positioning System
            keyword:  GLONASS > GLObalnaya NAvigatsionnaya Sputnikovaya Sistema
            keyword:  GNSS > Global Navigation Satellite System
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                    positionName:  GCMD User Support Office
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                        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
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                            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
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            keyword:  Earth Remote Sensing Instruments > Passive Remote Sensing > Positioning/Navigation > GPS
            keyword:  Earth Remote Sensing Instruments > Passive Remote Sensing > Positioning/Navigation > GPS > GPS Receivers
            keyword:  Earth Remote Sensing Instruments > Passive Remote Sensing > Positioning/Navigation > GPS > GNSS Receivers
            type:  (MD_KeywordTypeCode) instrument
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                            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
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                    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
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            keyword:  DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
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            thesaurusName:  (CI_Citation)
                title:  NASA/GCMD Science 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
        descriptiveKeywords:  (MD_Keywords)
            keyword:  ngda
            keyword:  Geodetic Control
            type:  (MD_KeywordTypeCode) theme
            thesaurusName:  (CI_Citation)
                title:  NGDA portfolio Themes
                date:
        descriptiveKeywords:  (MD_Keywords)
            keyword:  Geodetic/Global Positioning
            type:  (MD_KeywordTypeCode) theme
            thesaurusName:  (CI_Citation)
                title:  NOS Data Explorer Themes
                date:
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            keyword:  United States
            type:  (MD_KeywordTypeCode) place
            thesaurusName:  (CI_Citation)
                title:  Getty Thesaurus of Geographic Names
                date:  (CI_Date)
                    date:  2011-04-11
                    dateType:  (CI_DateTypeCode) revision
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName:  Getty Research Institute
                    contactInfo:  (CI_Contact)
                        address:  (CI_Address)
                            deliveryPoint:  1200 Getty Center Drive, Suite 1100
                            city:  Los Angeles
                            administrativeArea:  California
                            postalCode:  90049-1688
                            country:  United States
                            electronicMailAddress:  TGN@getty.edu
                        onlineResource:  (CI_OnlineResource)
                            linkage: http://www.getty.edu/research/tools/vocabularies/tgn/index.html
                            name:  Getty Thesaurus of Geographic Names Online Page
                            description:  This page provides an interface to search the Getty Thesaurus of Geographic Names.
                            function:  (CI_OnLineFunctionCode) information
                    role:  (CI_RoleCode) custodian
        resourceConstraints:  (MD_LegalConstraints)
            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_Constraints)
            useLimitation:  These data are considered raw and have not been subjected to the NOAA's quality control or quality assurance procedures. They are released for limited public use as preliminary data to be used only with appropriate caution. 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.
        language:  eng; USA
        characterSet:
        topicCategory:  (MD_TopicCategoryCode) geoscientificInformation
        topicCategory:  (MD_TopicCategoryCode) location
        extent:  (EX_Extent)
            description:  CORS data is collected throughout the United States, its territories, and a few foreign countries.
            geographicElement:  (EX_GeographicBoundingBox)
                westBoundLongitude:  -180.00
                eastBoundLongitude:  180.00
                southBoundLatitude:  -90.00
                northBoundLatitude:  90.00
            temporalElement:  (EX_TemporalExtent)
                extent:
                  TimePeriod:
                    beginPosition:  1994-02-01
                    endPosition:
            verticalElement:  (EX_VerticalExtent)
                minimumValue:
                  Real:  -600
                maximumValue:
                  Real:  10000
                verticalCRS:
        supplementalInformation:  The United States operates the Global Positioning System (GPS). The term Global Navigation Satellite Systems (GNSS) has been created to reference all navigation satellite systems. GNSS encompasses the U.S. GPS system, the Russian Federation GLONASS system, and any future systems such as Europe's Galileo or China's Compass.
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        attributeDescription:
        contentType:  (MD_CoverageContentTypeCode) referenceInformation
        dimension:  (MD_Band)
            sequenceIdentifier:
              MemberName:
                aName:  Latitude
                attributeType:
                  TypeName:
                    aName:  Real
            descriptor:  Latitude is measured from the equator, with positive values going north and negative values going south
            maxValue:
              Real:  90
            minValue:
              Real:  -90
            units:
            scaleFactor:
              Real:  1
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                aName:  Longitude
                attributeType:
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                    aName:  Real
            descriptor:  Longitude is measured from the Prime Meridian (which is the longitude that runs through Greenwich, England), with positive values going east and negative values going west
            maxValue:
              Real:  180
            minValue:
              Real:  -180
            units:
            scaleFactor:
              Real:  1
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        attributeDescription:
        contentType:  (MD_CoverageContentTypeCode) physicalMeasurement
        dimension:  (MD_Band)
            sequenceIdentifier:
              MemberName:
                aName:  Orthometric height (m)
                attributeType:
                  TypeName:
                    aName:  Real
            descriptor:  Distance along a plumb line, from the geoid to a point. The plumb line is a line regarded as directed exactly toward the earth's center of gravity. The geoid is the equipotential surface of the Earth's gravity field which best fits, in a least squares sense, global mean sea level.
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              Real:  -50
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        contentType:  (MD_CoverageContentTypeCode) physicalMeasurement
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                aName:  Ellipsoid or geodetic height (m)
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                    aName:  Real
            descriptor:  Distance along ellipsoid normal, from ellipsoid to a point. Due to rotation, the earth assumes the shape of a sphere that is flattened at the poles and bulging at the equator (an ellipse). Cartesian coordinates have their origin at the center of ellipsoid.
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              Real:  -5000
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            scaleFactor:
              Real:  1
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    distributionInfo:  (MD_Distribution)
        distributionFormat:  (MD_Format)
            name:  ASCII
            version:  2.11
            specification:  Receiver Independent Exchange Format (RINEX)
            fileDecompressionTechnique:  GNU zip compression (gzip)
        distributionFormat:  (MD_Format)
            name:  binary
            version:  Not applicable
            specification:  Binary data from receiver manufacturer. Note that binary data from the Federal Aviation Administration's Wide Area Augmentation System (FAA WAAS) has been translated from the manufacturer binary by the FAA into the FAA binary format called National Satellite TestBed (NSTB).
            fileDecompressionTechnique:  GNU zip compression (gzip), tar file format package
        distributor:  (MD_Distributor)
            distributorContact:  (CI_ResponsibleParty)
                organisationName:  DOC/NOAA/NOS/NGS > National Geodetic Survey, NOS, NOAA, U.S. Department of Commerce
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  (301) 713-3191
                    address:  (CI_Address)
                        deliveryPoint:  1315 East West Highway N/NGS2
                        city:  Silver Spring
                        administrativeArea:  MD
                        postalCode:  20910
                        country:  USA
                        electronicMailAddress:  ngs.cors@noaa.gov
                    hoursOfService:  9:00 - 5:00 Eastern
                role:  (CI_RoleCode) distributor
            distributionOrderProcess:  (MD_StandardOrderProcess)
                fees:  None
                orderingInstructions:  Available online
        distributor:  (MD_Distributor)
            distributorContact:  (CI_ResponsibleParty)
                organisationName:  DOC/NOAA/CLASS > Comprehensive Large Array-data Stewardship System, NOAA, U.S. Department of Commerce
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  (828) 271-4850 x3183
                    address:  (CI_Address)
                        deliveryPoint:  CLASS, 151 Patton Avenue
                        city:  Asheville
                        administrativeArea:  NC
                        postalCode:  28801-5001
                        country:  USA
                        electronicMailAddress:  info@class.noaa.gov
                    hoursOfService:  9:00 - 5:00 Eastern
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                fees:  None
                orderingInstructions:  Available online
        transferOptions:  (MD_DigitalTransferOptions)
            onLine:  (CI_OnlineResource)
                linkage:  ftp://geodesy.noaa.gov/cors/rinex/
                protocol:  ftp
                name:  Index of ftp://geodesy.noaa.gov/cors/rinex/
                description:  FTP site from CORS main facility in Silver Spring, MD
                function:  (CI_OnLineFunctionCode) download
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                linkage:  ftp://alt.ngs.noaa.gov/cors/rinex/
                protocol:  ftp
                name:  Index of ftp://alt.ngs.noaa.gov/cors/rinex/
                description:  FTP site from CORS alternate facility in Boulder, CO
                function:  (CI_OnLineFunctionCode) download
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                linkage: http://www.ngs.noaa.gov/CORS/
                protocol:  http
                applicationProfile:  web browser
                name:  National Geodectic Survey - Continuously Operating Reference Stations (CORS)
                description:  Home page for CORS main facility in Silver Spring, MD
                function:  (CI_OnLineFunctionCode) information
            onLine:  (CI_OnlineResource)
                linkage: http://alt.ngs.noaa.gov/CORS/
                protocol:  http
                applicationProfile:  web browser
                name:  National Geodetic Survey - Continuously Operating Reference Stations (CORS)
                description:  Home page for CORS alternate facility in Boulder, CO
                function:  (CI_OnLineFunctionCode) information
            onLine:  (CI_OnlineResource)
                linkage: http://www.class.ngdc.noaa.gov/saa/products/welcome
                protocol:  http
                applicationProfile:  web browser
                name:  Comprehensive Large Array-data Stewardship System (CLASS)
                description:  CORS data archived in CLASS, preserved with the at-sampling rate where available.
                function:  (CI_OnLineFunctionCode) information
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) dataset
        report:  (DQ_AbsoluteExternalPositionalAccuracy)
            nameOfMeasure:  Horizontal Positional Accuracy Report
            evaluationMethodDescription:  The horizontal coordinates of the GPS site, specifically the GPS antenna location, are accurate to about a centimeter once biases are removed.
            result:
        report:  (DQ_AbsoluteExternalPositionalAccuracy)
            nameOfMeasure:  Vertical Positional Accuracy Report
            evaluationMethodDescription:  The vertical coordinates of the GPS site, specifically the GPS antenna location, are accurate to about 2 centimeters once biases are removed.
            result:
        report:  (DQ_CompletenessCommission)
            evaluationMethodDescription:  Data written to the NGDC archive is reviewed for completeness. Automated routines perform daily checks for file names and file sizes, and also aided by the internal checksum of GNU zip compression as data is written to tape. Any faulty data is removed from the archive.
            result:
        report:  (DQ_ConceptualConsistency)
            measureDescription:  To become part of the CORS network, each site must pass through NGS' site criteria standards and maintain its integrity. Automated routines at NGDC pull data staged by NGS at regular intervals.
            result:
        lineage:  (LI_Lineage)
            statement:  GNSS observational data from the CORS network are ingested, translated, and processed by NGS and are posted to the NGS online servers as hourly or daily files, and ultimately retained as daily files in RINEX format. After 30 days, data in the at-sampling rate is copied to the NGDC archive, and NGS online holdings are then decimated to a 30-second sampling rate. Special use case: Certain groups such as the Federal Aviation Administration, the U.S. Coast Guard, NOAA's Earth System Research Laboratory (ESRL), and NGS, make GNSS data available in binary format to NGS. These data are used as input to algorithms for internal NOAA models such as the US-Total Electron Content product and to produce GPS Meteorology Water Vapor measurements. NGDC, not NGS, has decided to archive the raw data from these GPS stations as a daily tar file consisting of hourly binary files
            processStep:  (LE_ProcessStep)
                description:  INGEST: NGS has automated daily routines that harvests daily observational files in either binary or RINEX format at the original sampling rate, the daily broadcast ephemeris files, orbit files, and any corresponding meteorological files. For the special case use of FAA and USCG streaming data that are used as input to NOAA models, the streaming feed is harvested to a binary, incrementally-built hourly file.
                dateTime:
                  DateTime:  1994-02-01T00:00:00
                processor:  (CI_ResponsibleParty)
                    organisationName:  DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S. Department of Commerce
                    positionName:  User Services
                    contactInfo:  (CI_Contact)
                        phone:  (CI_Telephone)
                            voice:  301-713-3191
                            facsimile:  301-713-4324
                        address:  (CI_Address)
                            deliveryPoint:  Spatial Reference System Division
                            deliveryPoint:  1315 East-West Highway
                            deliveryPoint:  N/NGS2, SSMC3, Room 8813
                            city:  Silver Spring
                            administrativeArea:  MD
                            postalCode:  20910
                            country:  U.S.A.
                            electronicMailAddress:  ngs.cors@noaa.gov
                    role:  (CI_RoleCode) processor
            processStep:  (LE_ProcessStep)
                description:  PROCESSING: Data ingested by NGS are processed into RINEX format and made available online in either an hourly or daily cadence. Aside from positioning, processing includes the insertion of NGS headers, quality checks, and the production of quality control files (teqc summary files). Other scheduled routines retrieve higher level orbit files as they are made available.
                dateTime:
                  DateTime:  1994-02-01T00:00:00
                processor:  (CI_ResponsibleParty)
                    organisationName:  DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S. Department of Commerce
                    positionName:  User Services
                    contactInfo:  (CI_Contact)
                        phone:  (CI_Telephone)
                            voice:  301-713-3191
                            facsimile:  301-713-4324
                        address:  (CI_Address)
                            deliveryPoint:  Spatial Reference System Division
                            deliveryPoint:  1315 East-West Highway
                            deliveryPoint:  N/NGS2, SSMC3, Room 8813
                            city:  Silver Spring
                            administrativeArea:  MD
                            postalCode:  20910
                            country:  U.S.A.
                            electronicMailAddress:  ngs.cors@noaa.gov
                    role:  (CI_RoleCode) processor
            processStep:  (LE_ProcessStep)
                description:  DISTRIBUTION: NGS makes hourly and daily files available online. For the special case of binary FAA and USCG data, NGS pushes these files to NGDC every 5 minutes. NGDC stages the data for ESRL and SWPC groups, who harvests the data at a predetermined sub-hourly period. The completed binary hourly file at NGDC is kept locally. At the end of the day, a daily tar file consisting of the hourly data are created and staged for archive.
                dateTime:
                  DateTime:  1994-02-01T00:00:00
                processor:  (CI_ResponsibleParty)
                    individualName:  User Services
                    organisationName:  DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S. Department of Commerce
                    contactInfo:  (CI_Contact)
                        phone:  (CI_Telephone)
                            voice:  301-713-3191
                            facsimile:  301-713-4324
                        address:  (CI_Address)
                            deliveryPoint:  Spatial Reference System Division
                            deliveryPoint:  1315 East-West Highway
                            deliveryPoint:  N/NGS2, SSMC3, Room 8813
                            city:  Silver Spring
                            administrativeArea:  MD
                            postalCode:  20910
                            country:  U.S.A.
                            electronicMailAddress:  ngs.cors@noaa.gov
                    role:  (CI_RoleCode) processor
            processStep:  (LE_ProcessStep)
                description:  RETENTION: NGS retains the data at the original at-sampling rate for 30 days. After 30 days, NGS decimates its online holdings to a 30-second sampling rate.
                dateTime:
                  DateTime:  1994-02-01T00:00:00
                processor:  (CI_ResponsibleParty)
                    organisationName:  DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S. Department of Commerce
                    positionName:  User Services
                    contactInfo:  (CI_Contact)
                        phone:  (CI_Telephone)
                            voice:  301-713-3191
                            facsimile:  301-713-4324
                        address:  (CI_Address)
                            deliveryPoint:  Spatial Reference System Division
                            deliveryPoint:  1315 East-West Highway
                            deliveryPoint:  N/NGS2, SSMC3, Room 8813
                            city:  Silver Spring
                            administrativeArea:  MD
                            postalCode:  20910
                            country:  U.S.A.
                            electronicMailAddress:  ngs.cors@noaa.gov
                    role:  (CI_RoleCode) processor
            processStep:  (LE_ProcessStep)
                description:  ARCHIVE: Prior to the 30-day mark, the RINEX at-sampling rate data is copied to NGDC. Aftter 30 days, NGDC then stages, archives, and distributes the CORS data via the CLASS infrasturcture. For the special use case, the daily binary files from 4 days ago are archived by NGDC to CLASS.
                dateTime:
                  DateTime:  1994-02-01T00:00:00
                processor:  (CI_ResponsibleParty)
                    organisationName:  DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
                    positionName:  CORS Data Manager
                    contactInfo:  (CI_Contact)
                        phone:  (CI_Telephone)
                            voice:  (303) 497-3692
                            facsimile:  (303) 497-6513
                        address:  (CI_Address)
                            deliveryPoint:  NOAA/NESDIS/NGDC/STP
                            deliveryPoint:  325 Broadway E/GC2
                            city:  Boulder
                            administrativeArea:  CO
                            postalCode:  80305-3328
                            country:  USA
                            electronicMailAddress:  ngdc.cors@noaa.gov
                    role:  (CI_RoleCode) processor
            source:  (LI_Source)
                description:  Source Contribution: GNSS observational data in RINEX format and binary format, orbit data, and meteorological data (when available). Source Type: digital files via FTP
                sourceCitation:  (CI_Citation)
                    title:  NOAA archive: Continuously Operating Reference Stations (CORS)
                    date:  (CI_Date)
                        date:  1994-02-01
                        dateType:  (CI_DateTypeCode) publication
                    citedResponsibleParty:  (CI_ResponsibleParty)
                        individualName:  User Services
                        organisationName:  DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
                        contactInfo:  (CI_Contact)
                            phone:  (CI_Telephone)
                                voice:  (303) 497-6826
                                facsimile:  (303) 497-6513
                            address:  (CI_Address)
                                deliveryPoint:  NOAA/NESDIS/NGDC E/GC 325 Broadway
                                city:  Boulder
                                administrativeArea:  CO
                                postalCode:  80305-3328
                                country:  USA
                                electronicMailAddress:  ngdc.info@noaa.gov
                            hoursOfService:  7:30 - 5:00 Mountain
                        role:  (CI_RoleCode) publisher
                    citedResponsibleParty:  (CI_ResponsibleParty)
                        organisationName:  DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S. Department of Commerce
                        contactInfo:  (CI_Contact)
                            phone:  (CI_Telephone)
                                voice:  (301) 713-3242
                            address:  (CI_Address)
                                deliveryPoint:  1315 East West Highway, N/NGS3
                                deliveryPoint:  SSMC-3 8142
                                city:  Silver Spring
                                administrativeArea:  MD
                                postalCode:  20910
                                country:  USA
                        role:  (CI_RoleCode) originator
                    citedResponsibleParty:
                    citedResponsibleParty:  (CI_ResponsibleParty)
                        organisationName:
                        contactInfo:  (CI_Contact)
                            onlineResource:  (CI_OnlineResource)
                                linkage: http://geodesy.noaa.gov/CORS/
                                protocol:  http
                                applicationProfile:  web browser
                                name:  National Geodectic Survey - Continuously Operating Reference Stations (CORS)
                                description:  Home page for CORS main facility in Silver Spring, MD. Data is ingested in the at-sampling rate and available from NGS CORS online for 30 days. After 30 days, the CORS online data is decimated down to a 30-second sampling rate with the exception of the navigation files.
                                function:  (CI_OnLineFunctionCode) information
                        role:
                    citedResponsibleParty:  (CI_ResponsibleParty)
                        organisationName:
                        contactInfo:  (CI_Contact)
                            onlineResource:  (CI_OnlineResource)
                                linkage:  ftp://geodesy.noaa.gov/cors/rinex/
                                protocol:  ftp
                                name:  FTP access to NGS CORS in Silver Spring, MD
                                description:  FTP site from CORS main facility in Silver Spring, MD. Data is ingested in the at-sampling rate and available from NGS CORS online for 30 days. After 30 days, the CORS online data is decimated down to a 30-second sampling rate with the exception of the navigation files.
                                function:  (CI_OnLineFunctionCode) download
                        role:
                    citedResponsibleParty:  (CI_ResponsibleParty)
                        organisationName:
                        contactInfo:  (CI_Contact)
                            onlineResource:  (CI_OnlineResource)
                                linkage: http://geodesy.noaa.gov/UFCORS
                                protocol:  http
                                name:  NGS CORS facility in Silver Spring, MD: User Friendly CORS utility
                                description:  This utility allows users to obtain a specific block of Global Positioning System ( GPS ) data for a continuously operating reference station (CORS) contained in the network of GPS sites managed by the National Geodetic Survey. Data is ingested in the at-sampling rate and available from NGS CORS online for 30 days. After 30 days, the CORS online data is decimated down to a 30-second sampling rate with the exception of the navigation files.
                                function:  (CI_OnLineFunctionCode) search
                        role:
                    citedResponsibleParty:  (CI_ResponsibleParty)
                        organisationName:
                        contactInfo:  (CI_Contact)
                            onlineResource:  (CI_OnlineResource)
                                linkage: http://geodesy.noaa.gov/CORS/standard1.shtml
                                protocol:  http
                                name:  NGS CORS facility in Silver Spring, MD: Standard Download utility
                                description:  CORS data search utility of daily files. Allows users to query by site id, state id, country id, data type or date. Data is ingested in the at-sampling rate and available from NGS CORS online for 30 days. After 30 days, the CORS online data is decimated down to a 30-second sampling rate with the exception of the navigation files.
                                function:  (CI_OnLineFunctionCode) search
                        role:
                    citedResponsibleParty:  (CI_ResponsibleParty)
                        organisationName:
                        contactInfo:  (CI_Contact)
                            onlineResource:  (CI_OnlineResource)
                                linkage: http://alt.ngs.noaa.gov/CORS/
                                protocol:  http
                                applicationProfile:  web browser
                                name:  NGS CORS facility in Boulder, CO
                                description:  Home page for CORS alternate facility in Boulder, CO. Data is ingested in the at-sampling rate and available from NGS CORS online for 30 days. After 30 days, the CORS online data is decimated down to a 30-second sampling rate with the exception of the navigation files.
                                function:  (CI_OnLineFunctionCode) information
                        role:
                    citedResponsibleParty:  (CI_ResponsibleParty)
                        organisationName:
                        contactInfo:  (CI_Contact)
                            onlineResource:  (CI_OnlineResource)
                                linkage:  ftp://alt.ngs.noaa.gov/cors/rinex/
                                protocol:  ftp
                                name:  FTP access to NGS CORS facility in Boulder, CO
                                description:  FTP site from CORS alternate facility in Boulder, CO. Data is ingested in the at-sampling rate and available from NGS CORS online for 30 days. After 30 days, the CORS online data is decimated down to a 30-second sampling rate with the exception of the navigation files.
                                function:  (CI_OnLineFunctionCode) download
                        role:
                    citedResponsibleParty:  (CI_ResponsibleParty)
                        organisationName:
                        contactInfo:  (CI_Contact)
                            onlineResource:  (CI_OnlineResource)
                                linkage: http://www.class.ngdc.noaa.gov/saa/products/welcome
                                protocol:  http
                                name:  CLASS website at http://www.class.ngdc.noaa.gov/saa/products/welcome
                                description:  NGS CORS data archived in CLASS infrastructure. Every effort is made to assure that archived data are at-sampling rate, where available.
                                function:  (CI_OnLineFunctionCode) information
                        role:
                sourceExtent:  (EX_Extent)
                    temporalElement:  (EX_TemporalExtent)
                        extent:
                          TimePeriod:
                            beginPosition:  1994-02-01
                            endPosition:
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    metadataMaintenance:  (MD_MaintenanceInformation)
        maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) annually
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    acquisitionInformation:  (MI_AcquisitionInformation)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  Earth Remote Sensing Instruments > Passive Remote Sensing > Positioning/Navigation > GPS
            type:  Positioning/Navigation
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  GPS > Global Positioning System
            description:  The U.S. Air Force of the Department of Defense developed, maintains, and operates the space and control segments of the GPS constellation. Full Operational Capability was declared by NAVSTAR in April 1995.
            sponsor:  (CI_ResponsibleParty)
                organisationName:  United States Air Force
                role:  (CI_RoleCode) sponsor
            instrument:
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  GLONASS > GLObalnaya NAvigatsionnaya Sputnikovaya Sistema
            description:  Russian Federation Aerospace Defense Forces developed, maintains, and operates the space and control segments of the GLONASS constellation.
            sponsor:  (CI_ResponsibleParty)
                organisationName:  Russian Federation Aerospace Defense Forces
                role:  (CI_RoleCode) sponsor
            instrument: