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DMSP SSM/I- Microwave Imager
 (MI_Metadata)
    fileIdentifier:  gov.noaa.ngdc.stp.dmsp:G01123
    language:  eng; USA
    characterSet:  (MD_CharacterSetCode) utf8
    hierarchyLevel:  (MD_ScopeCode) dataset
    contact:  (CI_ResponsibleParty)
        individualName:  DMSP Data Manager
        organisationName:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
        contactInfo:  (CI_Contact)
            phone:  (CI_Telephone)
                voice:  303.497.3053
                facsimile:  (303) 497-6513
            address:  (CI_Address)
                deliveryPoint:  E/GC2 325 Broadway
                city:  Boulder
                administrativeArea:  CO
                postalCode:  80305
                country:  USA
                electronicMailAddress:  ngdc.dmsp@noaa.gov
            hoursOfService:  7:30 - 4:30 Mountain
            contactInstructions:  Contact Data Center
        role:  (CI_RoleCode) pointOfContact
    dateStamp:  2015-09-18
    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:  DMSP SSM/I- Microwave Imager
            date:  (CI_Date)
                date:  1992-01-01
                dateType:  (CI_DateTypeCode) publication
            edition:  First
            identifier:  (MD_Identifier)
                code:  SSM/I
            citedResponsibleParty:  (CI_ResponsibleParty)
                organisationName:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
                role:  (CI_RoleCode) publisher
            citedResponsibleParty:  (CI_ResponsibleParty)
                organisationName:  National Geophysical Data Center
                contactInfo:  (CI_Contact)
                    address:  (CI_Address)
                        city:  Boulder
                        administrativeArea:  CO
                role:  (CI_RoleCode) publisher
            citedResponsibleParty:  (CI_ResponsibleParty)
                organisationName:  DOD/USAF/AFWA > Air Force Weather Agency, U.S. Air Force, U.S. Department of Defense
                role:  (CI_RoleCode) originator
            citedResponsibleParty:  (CI_ResponsibleParty)
                organisationName:  DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce (comp)
                role:  (CI_RoleCode) originator
            citedResponsibleParty:  (CI_ResponsibleParty)
                organisationName: (withheld)
                contactInfo:  (CI_Contact)
                    onlineResource:  (CI_OnlineResource)
                        linkage: http://www.ngdc.noaa.gov/dmsp/sensors/ssmi.html
                        protocol:  http
                        name:  SSM/I- Microwave Imager
                        description:  Home page for the SSM/I sensor
                        function:  (CI_OnLineFunctionCode) information
                role: (inapplicable)
        abstract:  The SSM/I is a seven-channel, four frequency, linearly-polarized, passive microwave radiometric system which measures atmospheric, ocean and terrain microwave brightness temperatures at 19.35, 22.235, 37.0 and 85.5 GHz. The data are used to obtain synoptic maps of critical atmospheric, oceanographic and selected land parameters on a global scale. The SSM/I archive data set consists of antenna temperatures recorded across a 1,400 km conical scan, satellite ephemeris, earth surface positions for each pixel and instrument calibration. Electromagnetic radiation is polarized by the ambient electric field, scattered by the atmosphere and the Earth's surface and scattered and absorbed by atmospheric water vapor, oxygen, liquid water and ice. The SSM/I instrument consists of an offset parabolic reflector that is 24 x 26 inches fed by a seven- port horn antenna. The reflector and feed are mounted on a drum which contains the radiometers, digital data subsystem, mechanical scanning subsystem and power subsystem. The drum assembly rotates about the axis of the drum. A small mirror and a hot reference absorber are mounted on the assembly. The instrument sweeps a 450 cone around the satellite velocity vector so that the Earth incidence angle is always 540. Data are recorded during the 102.40 of the cone when the antenna beam intercepts the Earth's surface. The channel footprint varies with channel energy, position in the scan, along scan or along track direction and altitude of the satellite. The 85 GHz footprint is the smallest with a 13 x 15 km and the 19 GHz footprint is the largest at 43 x 69 km. Because the 85 GHz footprint is so small, it is sampled twice as often, i.e., 128 times a scan. One data cycle consists of 4 85 GHz scans and 2 scans of the 19, 22 and 37 GHz channels. The complete cycle takes 28 seconds and it must be complete to process the data. The SSM/I processor is queried once a second by onboard computer and the data are placed into the "TS SSP" data field. Data is ingested as sent from AFWA on a T-1 line. At the NOAA National Centers for Environmental Information (formerly National Geophysical Data Center), the "TS SSP" data are decommutated, deinterleaved, bit flipped, reordered and restructured into orbits beginning with the equatorial crossing as the satellite travels from south to north. Satellite ephemeris are computed using a physically-based, orbital mechanics model. SSM/I pixels are geolocated using the satellite ephemeris and satellite attitude corrections. Antenna temperatures are computed from instrumental counts by a linear equation, i.e., the conversion is reversible. In the decommutation step, we encountered bit reversals that occurred 1.8 - 3.4% of the time and are probably caused by ionospheric scintillation. These are identified through careful checking procedures and corrected. Archive files contain metadata by orbit and geolocated antenna temperatures.
        purpose:  Maps-Critical Atmosphere, Ocean, & Land Parameters
        status:  (MD_ProgressCode) underDevelopment
        pointOfContact:  (CI_ResponsibleParty)
            individualName:  DMSP Data Manager
            organisationName:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
            contactInfo:  (CI_Contact)
                phone:  (CI_Telephone)
                    voice:  303.497.3053
                    facsimile:  (303) 497-6513
                address:  (CI_Address)
                    deliveryPoint:  E/GC2 325 Broadway
                    city:  Boulder
                    administrativeArea:  CO
                    postalCode:  80305
                    country:  USA
                    electronicMailAddress:  ngdc.dmsp@noaa.gov
                hoursOfService:  7:30 - 4:30 Mountain
                contactInstructions:  Contact Data Center
            role:  (CI_RoleCode) pointOfContact
        resourceMaintenance:  (MD_MaintenanceInformation)
            maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) daily
        descriptiveKeywords:  (MD_Keywords)
            keyword:  EARTH SCIENCE > Spectral/Engineering > Microwave
            keyword:  EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC DYNAMICS > Temperature
            keyword:  EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC DYNAMICS > Precipitation
            keyword:  EARTH SCIENCE > RADIANCE OR IMAGERY > Microwave > Brightness Temperature
            keyword:  EARTH SCIENCE > OCEANS > DYNAMICS > Wind
            keyword:  EARTH SCIENCE > OCEANS > DYNAMICS > Sea Ice
            keyword:  EARTH SCIENCE > OCEANS > DYNAMICS > Brightness Temperature
            keyword:  EARTH SCIENCE > ATMOSPHERE > HYDROLOGICAL PARAMETER > Water Vapor
            keyword:  EARTH SCIENCE > BIOSPHERE > GEOGRAPHY AND LAND COVER > Ice
            keyword:  EARTH SCIENCE > BIOSPHERE > GEOGRAPHY AND LAND COVER > Snow
            keyword:  EARTH SCIENCE > BIOSPHERE > GEOGRAPHY AND LAND COVER > Surface Water
            type:  (MD_KeywordTypeCode) theme
            thesaurusName:  (CI_Citation)
                title:  NASA/GCMD Earth Science Keywords
                date: (unknown)
        descriptiveKeywords:  (MD_Keywords)
            keyword:  Snow Cover
            keyword:  Brightness Temperatures
            keyword:  Antenna Temperature
            keyword:  DMSP/SSMI
            keyword:  Sea Ice
            keyword:  Polar Orbiters
            keyword:  Satellite Meteorology
            keyword:  Ocean Surface Wind Speeds
            type:  (MD_KeywordTypeCode) theme
            thesaurusName:  (CI_Citation)
                title:  Uncontrolled Keywords
                date: (unknown)
        descriptiveKeywords:  (MD_Keywords)
            keyword:  Global
            type:  (MD_KeywordTypeCode) place
            thesaurusName:  (CI_Citation)
                title:  NASA/GCMD Location Keywords
                date: (unknown)
        descriptiveKeywords:  (MD_Keywords)
            keyword:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
            keyword:  DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
            type:  (MD_KeywordTypeCode) dataCenter
            thesaurusName:  (CI_Citation)
                title:  NASA/GCMD Data Center Keywords
                date:  (CI_Date)
                    date:  2015-03-01
                    dateType:  (CI_DateTypeCode) revision
                date:  (CI_Date)
                    date:  1995-04-24
                    dateType:  (CI_DateTypeCode) publication
                edition:  8.1
                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) publisher
                citedResponsibleParty:  (CI_ResponsibleParty)
                    organisationName: (inapplicable)
                    contactInfo:  (CI_Contact)
                        onlineResource:  (CI_OnlineResource)
                            linkage: http://gcmd.nasa.gov/learn/keyword_list.html
                            name:  GCMD's Science Keywords and Associated Directory Keywords
                            description:  This page describes the NASA GCMD Keywords, how to reference those keywords and provides download instructions.
                            function:  (CI_OnLineFunctionCode) information
                    role: (inapplicable)
        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: No Constraints
        language:  eng; USA
        extent:  (EX_Extent)
            geographicElement:  (EX_GeographicBoundingBox)
                westBoundLongitude:  -180
                eastBoundLongitude:  180
                southBoundLatitude:  -90
                northBoundLatitude:  90
            temporalElement:  (EX_TemporalExtent)
                extent:
                  TimePeriod:
                    beginPosition:  1974-04-01
                    endPosition:
        supplementalInformation:  Entry ID: G01123 Sensor Name: SSM/I > Microwave Imager Source Name: DMSP > Defense Meteorological Satellite Program
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    contentInfo:  (MD_ImageDescription)
        attributeDescription: (inapplicable)
        contentType: (inapplicable)
        cloudCoverPercentage: (unknown)
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    distributionInfo:  (MD_Distribution)
        distributionFormat:  (MD_Format)
            name:  ASCII
            version: (unknown)
        distributor:  (MD_Distributor)
            distributorContact:  (CI_ResponsibleParty)
                individualName:  DMSP Data Manager
                organisationName:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
                contactInfo:  (CI_Contact)
                    phone:  (CI_Telephone)
                        voice:  303.497.3053
                        facsimile:  (303) 497-6513
                    address:  (CI_Address)
                        deliveryPoint:  E/GC2 325 Broadway
                        city:  Boulder
                        administrativeArea:  CO
                        postalCode:  80305
                        country:  USA
                        electronicMailAddress:  ngdc.dmsp@noaa.gov
                    hoursOfService:  7:30 - 4:30 Mountain
                    contactInstructions:  Contact Data Center
                role:  (CI_RoleCode) pointOfContact
            distributionOrderProcess:  (MD_StandardOrderProcess)
                fees:  Download available for no cost
        transferOptions:  (MD_DigitalTransferOptions)
            transferSize:
              Real:  400.00
            onLine:  (CI_OnlineResource)
                linkage: http://spidr.ngdc.noaa.gov
                applicationProfile:  http
                name:  Spidr interface
                description:  Download data from Spidr
                function:  (CI_OnLineFunctionCode) download
            onLine:  (CI_OnlineResource)
                linkage: http://spidr.ngdc.noaa.gov
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) repository
            levelDescription:  (MD_ScopeDescription)
                other:  NOAA National Centers for Environmental Information
        lineage:  (LI_Lineage)
            processStep:  (LE_ProcessStep)
                description:  NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
                dateTime:
                  DateTime:  2015-04-22T00:00:00
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    dataQualityInfo:  (DQ_DataQuality)
        scope:  (DQ_Scope)
            level:  (MD_ScopeCode) dataset
        report:  (DQ_CompletenessCommission)
            evaluationMethodDescription:  Not Available
            result: (unknown)
        report:  (DQ_ConceptualConsistency)
            measureDescription:  Unknown
            result: (unknown)
        lineage:  (LI_Lineage)
            processStep:  (LE_ProcessStep)
                description:  The SSM/I processor is queried once a second by onboard computer and the data are placed into the "TS SSP" data field. Data is ingested as sent from AFWA on a T-1 line. At the NOAA National Centers for Environmental Information (formerly National Geophysical Data Center), the "TS SSP" data are decommutated, deinterleaved, bit flipped, reordered and restructured into orbits beginning with the equatorial crossing as the satellite travels from south to north. Satellite ephemeris are computed using a physically-based, orbital mechanics model. SSM/I pixels are geolocated using the satellite ephemeris and satellite attitude corrections. Antenna temperatures are computed from instrumental counts by a linear equation, i.e., the conversion is reversible.
                dateTime: (unknown)
                processor:  (CI_ResponsibleParty)
                    individualName:  DMSP Data Manager
                    organisationName:  DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
                    role:  (CI_RoleCode) processor
                source:  #RDR
                output:  #SSMI
            source:  (LI_Source)
                description:  Source Contribution: Used the Raw Data Records Source Type: digital database file
                sourceCitation:  (CI_Citation)
                    title:  DMSP Raw Data Records (RDR)
                    date:  (CI_Date)
                        date: (unknown)
                        dateType:  (CI_DateTypeCode) publication
                    identifier:  (MD_Identifier)
                        code:  RDR
                    citedResponsibleParty:  (CI_ResponsibleParty)
                        organisationName:  DOD/USAF/AFWA > Air Force Weather Agency, U.S. Air Force, U.S. Department of Defense
                        role:  (CI_RoleCode) originator
                sourceExtent:  (EX_Extent)
                    temporalElement:  (EX_TemporalExtent)
                        extent:
                          TimePeriod:
                            beginPosition:  1992-01-01
                            endPosition:
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    metadataMaintenance:  (MD_MaintenanceInformation)
        maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) annually
        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 2012-11-07 version of the FGDC RSE to ISO 19115-2 transform.
        maintenanceNote:  Translated from FGDC 2014-01-31T19:22:35.816-07:00
        maintenanceNote:  This record was automatically modified on 2015-09-18 to include references to NCEI where applicable.
        contact:  (CI_ResponsibleParty)
            individualName:  Anna Milan
            organisationName:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
            positionName:  Metadata Specialist
            contactInfo:  (CI_Contact)
                phone:  (CI_Telephone)
                    voice:  (303) 497-5099
                    facsimile:  (303) 497-6513
                address:  (CI_Address)
                    deliveryPoint:  Mail Code E/NE52
                    deliveryPoint:  325 Broadway
                    city:  Boulder
                    administrativeArea:  CO
                    postalCode:  80305-3328
                    country:  USA
                    electronicMailAddress:  Anna.Milan@noaa.gov
                hoursOfService:  9:00 - 5:00 Mountain
            role:  (CI_RoleCode) pointOfContact
        contact:  (CI_ResponsibleParty)
            individualName:  DMSP Data Manager
            organisationName:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
            contactInfo:  (CI_Contact)
                phone:  (CI_Telephone)
                    voice:  303.497.3053
                    facsimile:  (303) 497-6513
                address:  (CI_Address)
                    deliveryPoint:  E/GC2 325 Broadway
                    city:  Boulder
                    administrativeArea:  CO
                    postalCode:  80305
                    country:  USA
                    electronicMailAddress:  ngdc.dmsp@noaa.gov
                hoursOfService:  7:30 - 4:30 Mountain
                contactInstructions:  Contact Data Center
            role:  (CI_RoleCode) pointOfContact