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    <ResourceID>spase://NASA/NumericalData/IMP8/GME/PT30M</ResourceID>
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    <ResourceHeader>
      <ResourceName>IMP 8 Goddard Medium Energy (GME) 30-min energetic particle rates and fluxes</ResourceName>
      <DOI>https://doi.org/10.48322/m36p-0998</DOI>
      <ReleaseDate>2025-12-04T13:29:34Z</ReleaseDate>
      <RevisionHistory>
        <RevisionEvent>
          <ReleaseDate>2021-04-27T15:38:11</ReleaseDate>
          <Note>Only known prior ReleaseDate of the metadata</Note>
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        <RevisionEvent>
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          <ReleaseDate>2025-09-10T12:34:56.789</ReleaseDate>
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        <RevisionEvent>
          <ReleaseDate>2025-12-04T13:29:34Z</ReleaseDate>
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      <Description>This CDAWeb-accessible data set contains 30-minute, spin-averaged count rates and fluxes, and their statistical uncertainties, of energetic particles from the IMP8 GME experiment. Included are fluxes of: protons in 30 energy bins from 0.88-1.15 to 327-485 MeV; alpha particles in 21 energy bins from 1.14-1.36 to 63.3-81.0 MeV/n; and 0.3-18 MeV electrons. Also included are count rates for each of 7 sensors and for 11 multi-sensor coincidence modes. Proton and alpha particle fluxes, for every other energy bin, are given at the FTPBrowser and MSSP interfaces identified below.</Description>
      <Acknowledgement>Acknowledge Robert E. McGuire, the PI.</Acknowledgement>
      <PublicationInfo>
        <Authors>McGuire, Robert, E.</Authors>
        <PublicationDate>2023-01-01T00:00:00</PublicationDate>
        <PublishedBy>Space Physics Data Facility</PublishedBy>
      </PublicationInfo>
      <Contact>
        <PersonID>spase://SMWG/Person/Robert.E.McGuire</PersonID>
        <Role>PrincipalInvestigator</Role>
      </Contact>
      <Contact>
        <PersonID>spase://SMWG/Person/Lee.Frost.Bargatze</PersonID>
        <Role>MetadataContact</Role>
      </Contact>
      <InformationURL>
        <Name>NSSDC Master Catalog</Name>
        <URL>https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1973-078A-09</URL>
      </InformationURL>
      <InformationURL>
        <Name>CDAWeb Skeleton Table</Name>
        <URL>https://spdf.gsfc.nasa.gov/pub/software/cdawlib/0SKELTABLES/i8_h0_gme_00000000_v01.skt</URL>
      </InformationURL>
      <PriorID>spase://VEPO/NumericalData/IMP8/GME/PT30M</PriorID>
      <PriorID>spase://VSPO/NumericalData/IMP8/GME/PT30M</PriorID>
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      <RepositoryID>spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb</RepositoryID>
      <Availability>Online</Availability>
      <AccessRights>Open</AccessRights>
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          <Note>CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products</Note>
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      <AccessURL>
        <Name>FTPS from SPDF (not with most browsers)</Name>
        <URL>ftps://spdf.gsfc.nasa.gov/pub/data/imp/imp8/particles_gme/data/flux/gme_h0/</URL>
        <Description>ftp access to 6-month CDF files</Description>
      </AccessURL>
      <AccessURL>
        <Name>HTTPS from SPDF</Name>
        <URL>https://spdf.gsfc.nasa.gov/pub/data/imp/imp8/particles_gme/data/flux/gme_h0/</URL>
        <Description>In CDF via HTTP from SPDF</Description>
      </AccessURL>
      <AccessURL>
        <Name>CDAWeb</Name>
        <URL>https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=I8_H0_GME&amp;index=sp_phys</URL>
        <ProductKey>I8_H0_GME</ProductKey>
        <Description>Subset, plot and list via CDAWeb; ASCII output option</Description>
      </AccessURL>
      <Format>CDF</Format>
      <DataExtent>
        <Quantity>200</Quantity>
        <Units>MB</Units>
      </DataExtent>
      <Acknowledgement>Acknowledge Robert E. McGuire, the PI, and CDAWeb</Acknowledgement>
    </AccessInformation>
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      <Availability>Online</Availability>
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      <AccessURL>
        <Name>CDAWeb HAPI Server</Name>
        <URL>https://cdaweb.gsfc.nasa.gov/hapi</URL>
        <Style>HAPI</Style>
        <ProductKey>I8_H0_GME</ProductKey>
        <Description>Web Service to this product using the HAPI interface.</Description>
      </AccessURL>
      <Format>CSV</Format>
      <Acknowledgement>Acknowledge Robert E. McGuire, the PI, and CDAWeb</Acknowledgement>
    </AccessInformation>
    <AccessInformation>
      <RepositoryID>spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb</RepositoryID>
      <Availability>Online</Availability>
      <AccessRights>Open</AccessRights>
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      <AccessURL>
        <Name>FTPBrowser</Name>
        <URL>https://omniweb.gsfc.nasa.gov/ftpbrowser/imp8_gme_30m.html</URL>
        <Description>Subset, plot and list H and He fluxes</Description>
      </AccessURL>
      <AccessURL>
        <Name>Multi-Source Spectral Plot</Name>
        <URL>https://omniweb.gsfc.nasa.gov/ftpbrowser/flux_spectr_m.html</URL>
        <Description>Spectral plots and power law fits for arbitrary durations for H and He fluxes</Description>
      </AccessURL>
      <Format>Text</Format>
      <Acknowledgement>Acknowledge Robert E. McGuire, the PI, SPDF and the service used</Acknowledgement>
    </AccessInformation>
    <InstrumentID>spase://SMWG/Instrument/IMP8/MCGUIRE</InstrumentID>
    <MeasurementType>EnergeticParticles</MeasurementType>
    <TemporalDescription>
      <TimeSpan>
        <StartDate>1973-11-01T00:00:00</StartDate>
        <StopDate>2001-10-26T00:00:00</StopDate>
      </TimeSpan>
      <Cadence>PT30M</Cadence>
    </TemporalDescription>
    <ObservedRegion>Heliosphere.NearEarth</ObservedRegion>
    <ObservedRegion>Earth.Magnetosheath</ObservedRegion>
    <ObservedRegion>Earth.Magnetosphere.Magnetotail</ObservedRegion>
    <Parameter>
      <Name>Proton fluxes</Name>
      <Description>Spin-integrated fluxes of protons, at 30-min resolution, in 30 energy bins ranging from 0.88-1.15 MeV to 327-485 MeV, and statistical uncertainties in these fluxes</Description>
      <Cadence>PT30M</Cadence>
      <Units>1/sec-cm**2-ster-MeV</Units>
      <Structure>
        <Size>30 2</Size>
        <Description>Array of fluxes and corresponding uncertainties at 30 energy windows</Description>
      </Structure>
      <Particle>
        <ParticleType>Proton</ParticleType>
        <ParticleQuantity>NumberFlux</ParticleQuantity>
        <AtomicNumber>1</AtomicNumber>
        <EnergyRange>
          <Low>0.88</Low>
          <High>485</High>
          <Units>MeV</Units>
        </EnergyRange>
      </Particle>
    </Parameter>
    <Parameter>
      <Name>Alpha particle fluxes</Name>
      <Description>Spin-integrated fluxes of alpha particles, at 30-min resolution, in 21 energy bins ranging from 1.14-1.36 MeV/n to 63.3-81.0 MeV/n, and statistical uncertainties in these fluxes</Description>
      <Cadence>PT30M</Cadence>
      <Units>1/sec-cm**2-ster-MeV/n</Units>
      <Structure>
        <Size>21 2</Size>
        <Description>Array of fluxes and corresponding uncertainties at 21 energy windows</Description>
      </Structure>
      <Particle>
        <ParticleType>AlphaParticle</ParticleType>
        <ParticleQuantity>NumberFlux</ParticleQuantity>
        <AtomicNumber>2</AtomicNumber>
        <EnergyRange>
          <Low>1.14</Low>
          <High>81</High>
          <Units>MeV/n</Units>
        </EnergyRange>
      </Particle>
    </Parameter>
    <Parameter>
      <Name>Electron fluxes</Name>
      <Description>Spin-integrated fluxes of 3-18 MeV electrons, at 30-min resolution, and statistical uncertainties in these fluxes</Description>
      <Cadence>PT30M</Cadence>
      <Units>1/sec-cm**2-ster-MeV</Units>
      <Structure>
        <Size>2</Size>
        <Description>Array of one flux and its corresponding uncertainty</Description>
      </Structure>
      <Particle>
        <ParticleType>Electron</ParticleType>
        <ParticleQuantity>NumberFlux</ParticleQuantity>
        <EnergyRange>
          <Low>3</Low>
          <High>18</High>
          <Units>MeV</Units>
        </EnergyRange>
      </Particle>
    </Parameter>
    <Parameter>
      <Name>Electron background fluxes</Name>
      <Description>Spin-integrated fluxes considered as background for 3-18 MeV electron flux, at 30-min resolution, and statistical uncertainties in these fluxes</Description>
      <Cadence>PT30M</Cadence>
      <Units>1/sec-cm**2-ster-MeV</Units>
      <Structure>
        <Size>2</Size>
        <Description>Array of one flux and its corresponding uncertainty</Description>
      </Structure>
      <Particle>
        <ParticleType>Electron</ParticleType>
        <ParticleQuantity>NumberFlux</ParticleQuantity>
      </Particle>
    </Parameter>
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