<?xml version="1.0" encoding="UTF-8"?>

<Spase xmlns="http://www.spase-group.org/data/schema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.spase-group.org/data/schema http://cdpp.irap.omp.eu/AMDA-NG/public/schemas/spase-amda-1_2_0.xsd">

   <Version>2.2.6</Version>
   <NumericalData>
      <ResourceID>spase://CDPP/NumericalData/AMDA/Indices/Ground_Based/ground-based-am</ResourceID>
      <ResourceHeader>

         <ResourceName>am</ResourceName>

         <AlternateName>am IAGA-endorsed magnetic activity index</AlternateName>

         <ReleaseDate>2018-01-16T11:00:00Z</ReleaseDate>

         <Description>Index which purpose is to provide a characterization of global geomagnetic activity using a large set of stations representing all longitudes and possible hemispheric discrepancies.</Description>

         <Acknowledgement>ISGI website at EOST; License: CC BY-NC https://creativecommons.org/licenses/by-nc/4.0/</Acknowledgement>

         <Contact>        

            <PersonID>spase://CDPP/Person/Aude.Chambodut</PersonID>

            <Role>TechnicalContact</Role>

         </Contact>
         <InformationURL>

           <Name>IAGA geomagnetic indices</Name>

           <URL>http://isgi.unistra.fr/indices_am.php</URL>              

           <Description>
	   </Description>

         </InformationURL>       
      </ResourceHeader>
      <AccessInformation>

         <RepositoryID>spase://CDPP/Repository/CDPP/AMDA</RepositoryID>

         <Availability>Online</Availability>
         <AccessRights>Open</AccessRights>
         <AccessURL>
            <Name>AMDA at CDPP</Name>
            <URL>
                http://amda.cdpp.eu
            </URL>
         </AccessURL>

         <Format>Text</Format>

         <Acknowledgement>           
         </Acknowledgement>
      </AccessInformation>

      <ProviderName>ISGI/UNISTRA</ProviderName> 

      <InstrumentID>spase://CDPP/Instrument/AMDA/Indices/Ground_Based</InstrumentID>

      <MeasurementType>MagneticField</MeasurementType>

      <TemporalDescription>
         <TimeSpan>

             <StartDate>1975-01-01T00:00:00Z</StartDate>

             <StopDate>2019-01-21T21:00:00Z</StopDate>

         </TimeSpan>

      <Cadence>PT3H</Cadence></TemporalDescription>
      <ObservedRegion>Earth.NearSurface</ObservedRegion>

      <Caveats>
      </Caveats>    

      <Parameter>

         <Name>am</Name>
         <ParameterKey>am</ParameterKey>

         <Description>am = (an + as)/2</Description>

         <Ucd/>
         <Units>nT</Units>
         <UnitsConversion/>
      </Parameter>
      <Parameter>
         <Name>Am</Name>
         <ParameterKey>Am</ParameterKey>

         <Description>Daily Mean of am</Description>

         <Ucd/>
         <Units>nT</Units>
         <UnitsConversion/>
      </Parameter>
   </NumericalData>

</Spase>