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  <Version>2.4.1</Version>
  <NumericalData>
    <ResourceID>spase://CNES/NumericalData/CDPP-AMDA/Indices/Ground_Based/ground-based-sme</ResourceID>
    <ResourceHeader>
      <ResourceName>SuperMAG indices</ResourceName>
      <AlternateName>SuperMAG SML, SMU, SME indices</AlternateName>
      <ReleaseDate>2023-06-26T01:32:17Z</ReleaseDate>
      <Description>SuperMAG is a worldwide collaboration of organizations and national agencies that currently operate more than 300 ground based magnetometers. SuperMAG provides easy access to validated ground magnetic field perturbations in the same coordinate system, identical time resolution and with a common baseline removal approach.

SuperMAG utilizes 3D vector measurements of the magnetic field obtained from ground bases magnetometers. Stations providing absolute measurements (e.g. Intermagnet Observatories) as well as stations providing relative measurements are included. SuperMAG is focused on the variations caused by electric currents flowing in the ionosphere and magnetosphere and hence subtracts the dominant and slowly varying Earth main field.

SuperMAG service includes data with two different temporal resolution, 1-min and 1-sec. The latter is a subset of the former as not all stations provide 1-sec data. The 1-min data and all derived products can be accessed by selecting the 'Low Fidelity' option under Indices, Data, Polar Plots, Movies and Products. The 1-sec data and all derived products can be accessed by selecting the 'High Fidelity' option under Data and Polar Plots.

More information and details are available in Gjerloev [2009] and Gjerloev [2012].</Description>
      <Acknowledgement>We gratefully acknowledge the SuperMAG collaborators (https://supermag.jhuapl.edu/info/?page=acknowledgement).

Gjerloev, J. W. (2012), The SuperMAG data processing technique, J. Geophys. Res., 117, A09213, doi:10.1029/2012JA017683

Newell, P. T., and J. W. Gjerloev (2011), Evaluation of SuperMAG auroral electrojet indices as indicators of substorms and auroral power, J. Geophys. Res., 116, A12211, doi:10.1029/2011JA016779
</Acknowledgement>
      <Contact>
        <PersonID>spase://SMWG/Person/Jesper.W.Gjerloev</PersonID>
        <Role>PrincipalInvestigator</Role>
      </Contact>
      <InformationURL>
        <Name>SuperMAG description</Name>
        <URL>https://supermag.jhuapl.edu/info/?page=about</URL>
      </InformationURL>
      <InformationURL>
        <Name>SuperMAG acknowledgement</Name>
        <URL>https://supermag.jhuapl.edu/info/?page=acknowledgement</URL>
      </InformationURL>
      <InformationURL>
        <Name>SuperMAG Rules of the Road</Name>
        <URL>https://supermag.jhuapl.edu/info/?page=rulesoftheroad</URL>
      </InformationURL>
      <InformationURL>
        <Name>Gjerloev, J. W. (2012), The SuperMAG data processing technique, J. Geophys. Res., 117, A09213, doi:10.1029/2012JA017683</Name>
        <URL>https://doi.org/10.1029/2012JA017683</URL>
      </InformationURL>
      <InformationURL>
        <Name>Newell, P. T., and J. W. Gjerloev (2011), Evaluation of SuperMAG auroral electrojet indices as indicators of substorms and auroral power, J. Geophys. Res., 116, A12211, doi:10.1029/2011JA016779</Name>
        <URL>https://doi.org/10.1029/2011JA016779</URL>
      </InformationURL>
      <InformationURL>
        <Name>Gjerloev, J. W. (2009), A Global Ground-Based Magnetometer Initiative, Eos Trans. AGU, 90( 27), 230– 231, doi:10.1029/2009EO270002</Name>
        <URL>https://doi.org/10.1029/2009EO270002</URL>
      </InformationURL>
    </ResourceHeader>
    <AccessInformation>
      <RepositoryID>spase://SMWG/Repository/CDPP/AMDA</RepositoryID>
      <Availability>Online</Availability>
      <AccessRights>Open</AccessRights>
      <AccessURL>
        <Name>CDPP/AMDA HAPI Server</Name>
        <URL>http://amda.irap.omp.eu/service/hapi</URL>
        <Style>HAPI</Style>
        <Description>Web Service to this product using the HAPI interface.</Description>
      </AccessURL>
      <Format>CSV</Format>
      <Acknowledgement>Thank you for acknowledging the use of AMDA in publications with wording like "Data analysis was performed with the AMDA science analysis system provided by the Centre de Données de la Physique des Plasmas (CDPP) supported by CNRS, CNES, Observatoire de Paris and Université Paul Sabatier, Toulouse".. See the Rules of the road at http://amda.cdpp.eu/help/policy.html. Please acknowledge the Data Providers.</Acknowledgement>
    </AccessInformation>
    <AccessInformation>
      <RepositoryID>spase://SMWG/Repository/CDPP/AMDA</RepositoryID>
      <Availability>Online</Availability>
      <AccessRights>Open</AccessRights>
      <AccessURL>
        <Name>CDPP/AMDA Web application</Name>
        <URL>http://amda.cdpp.eu</URL>
        <Description>Access to Data via CDPP/AMDA Web application.</Description>
      </AccessURL>
      <Format>CSV</Format>
      <Format>VOTable</Format>
      <Format>CDF</Format>
      <Format>PNG</Format>
      <Acknowledgement>Thank you for acknowledging the use of AMDA in publications with wording like "Data analysis was performed with the AMDA science analysis system provided by the Centre de Données de la Physique des Plasmas (CDPP) supported by CNRS, CNES, Observatoire de Paris and Université Paul Sabatier, Toulouse".. See the Rules of the road at http://amda.cdpp.eu/help/policy.html. Please acknowledge the Data Providers.</Acknowledgement>
    </AccessInformation>
    <ProviderName>SuperMAG</ProviderName>
    <InstrumentID>spase://CNES/Instrument/CDPP-AMDA/Indices/Ground_Based</InstrumentID>
    <MeasurementType>MagneticField</MeasurementType>
    <TemporalDescription>
      <TimeSpan>
        <StartDate>1975-01-01T00:00:00Z</StartDate>
        <StopDate>2023-06-26T23:59:00Z</StopDate>
      </TimeSpan>
      <Cadence>PT1M</Cadence>
    </TemporalDescription>
    <ObservedRegion>Earth.NearSurface</ObservedRegion>
    <Caveats>
      </Caveats>
    <Parameter>
      <Name>SME</Name>
      <ParameterKey>sme</ParameterKey>
      <Units>nT</Units>
      <Field>
        <FieldQuantity>Magnetic</FieldQuantity>
      </Field>
    </Parameter>
    <Parameter>
      <Name>SMU</Name>
      <ParameterKey>smu</ParameterKey>
      <Units>nT</Units>
      <Field>
        <FieldQuantity>Magnetic</FieldQuantity>
      </Field>
    </Parameter>
    <Parameter>
      <Name>SML</Name>
      <ParameterKey>sml</ParameterKey>
      <Units>nT</Units>
      <Field>
        <FieldQuantity>Magnetic</FieldQuantity>
      </Field>
    </Parameter>
  </NumericalData>
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