<?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>2018-06-15T21:00:00Z</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>