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Auroral Electrojet (AE, AL, AO, AU) - A Global Measure of Auroral Zone Magnetic Activity
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    language:  eng; USA
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    contact:  (CI_ResponsibleParty)
        individualName:  Justin Mabie
        organisationName:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
        positionName:  Space and Terrestrial Weather Specialist
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                facsimile:  (303) 497-6513
            address:  (CI_Address)
                deliveryPoint:  325 Broadway, Mail Code E/GC4
                city:  Boulder
                administrativeArea:  CO
                postalCode:  80305-3328
                country:  USA
                electronicMailAddress:  Justin.Mabie@noaa.gov
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    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:  Auroral Electrojet (AE, AL, AO, AU) - A Global Measure of Auroral Zone Magnetic Activity
            date:  (CI_Date)
                date:  1976-01-01
                dateType:  (CI_DateTypeCode) publication
            edition:  First
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                organisationName:  NOAA National Centers for Environmental Information
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                organisationName:  DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
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                        linkage: http://swdcwww.kugi.kyoto-u.ac.jp/aedir/index.html
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                        name:  WDC-C2 KYOTO AE index service
                        description:  Home page for the World Data Center for Geomagnetism with links to the data
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                    onlineResource:  (CI_OnlineResource)
                        linkage: https://www.ngdc.noaa.gov/geomag
                        protocol:  http
                        name:  Auroral Electrojet Index (AE)
                        description:  Home page
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                role: (inapplicable)
            series:  (CI_Series)
                name:  Upper Atmosphere Geophysics International Standard Serial Numbers (ISSN)
                issueIdentification:  'ISSN 0579-7144 UAG Upper Atmosphere Geophysics'
        abstract:  The AE index is derived from geomagnetic variations in the horizontal component observed at selected (10-13) observatories along the auroral zone in the northern hemisphere. To normalize the data a base value for each station is first calculated for each month by averaging all the data from the station on the five international quietest days. This base value is subtracted from each value of one-minute data obtained at the station during that month. Then among the data from all the stations at each given time (UT), the largest and smallest values are selected. The AU and AL indices are respectively defined by the largest and the smallest values so selected. The symbols, AU and AL, derive from the fact that these values form the upper and lower envelopes of the superposed plots of all the data from these stations as functions of UT. The difference, AU minus AL, defines the AE index, and the mean value of the AU and AL, i.e. (AU+AL)/2, defines the AO index. The term "AE indices" is usually used to represent these four indices (AU, AL, AE and AO). The AU and AL indices are intended to express the strongest current intensity of the eastward and westward auroral electrojets, respectively. The AE index represents the overall activity of the electrojets, and the AO index provides a measure of the equivalent zonal current.
        purpose:  Geomagnetic Research
        status:  (MD_ProgressCode) underDevelopment
        pointOfContact:  (CI_ResponsibleParty)
            individualName:  Justin Mabie
            organisationName:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
            positionName:  Space and Terrestrial Weather Specialist
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                    city:  Boulder
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                    country:  USA
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        descriptiveKeywords:  (MD_Keywords)
            keyword:  Earth Science > Solid Earth > Geomagnetism > Geomagnetic Indices
            keyword:  Earth Science > Sun-Earth Interactions > Ionosphere/Magnetosphere Dynamics > Aurorae
            keyword:  Earth Science > Sun-Earth Interactions > Ionosphere/Magnetosphere Dynamics > Geomagnetic Indices
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                    date:  2020-01-09
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                edition:  9.1
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            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
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            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.
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        language:  eng; USA
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                extent:
                  TimePeriod:
                    beginPosition:  1957-01-01
                    endPosition:
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                individualName:  Justin Mabie
                organisationName:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
                positionName:  Space and Terrestrial Weather Specialist
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                        voice:  (303) 497-6135
                        facsimile:  (303) 497-6513
                    address:  (CI_Address)
                        deliveryPoint:  325 Broadway, Mail Code E/GC4
                        city:  Boulder
                        administrativeArea:  CO
                        postalCode:  80305-3328
                        country:  USA
                        electronicMailAddress:  Justin.Mabie@noaa.gov
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                linkage: ftp://ftp.ngdc.noaa.gov/STP/GEOMAGNETIC_DATA/INDICES/AURORAL_ELECTROJET
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                name:  Geomagnetic Data/Indices/Auroral Electroject
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                linkage: http://swdcwww.kugi.kyoto-u.ac.jp/aedir/index.html
                protocol:  http
                name:  WDC-C2 KYOTO AE index service
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                linkage: ftp://ftp.ngdc.noaa.gov/STP/GEOMAGNETIC_DATA/INDICES/AURORAL_ELECTROJET
            onLine:  (CI_OnlineResource)
                linkage: http://swdcwww.kugi.kyoto-u.ac.jp/aedir/index.html
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                other:  NOAA National Centers for Environmental Information
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                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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    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 2012-08-08 version of the FGDC RSE to ISO 19115-2 transform.
        maintenanceNote:  Translated from FGDC 2012-10-10T11:06:47.533-06:00
        maintenanceNote:  This record was automatically modified on 2015-09-18 to include references to NCEI where applicable.
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        contact:  (CI_ResponsibleParty)
            individualName:  Justin Mabie
            organisationName:  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
            positionName:  Space and Terrestrial Weather Specialist
            contactInfo:  (CI_Contact)
                phone:  (CI_Telephone)
                    voice:  (303) 497-6135
                    facsimile:  (303) 497-6513
                address:  (CI_Address)
                    deliveryPoint:  325 Broadway, Mail Code E/GC4
                    city:  Boulder
                    administrativeArea:  CO
                    postalCode:  80305-3328
                    country:  USA
                    electronicMailAddress:  Justin.Mabie@noaa.gov
            role:  (CI_RoleCode) pointOfContact