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  <Version>2.3.2</Version>
  <NumericalData>
    <ResourceID>spase://NASA/NumericalData/IMP8/MAG/PT15.36S</ResourceID>
    <ResourceHeader>
      <ResourceName>IMP 8 MAG 15.36s Magnetic Field Measurements</ResourceName>
      <ReleaseDate>2021-04-27T15:38:11Z</ReleaseDate>
      <Description>IMP 8 magnetic field measurements from tri-axis magnetometer. 
Time resolution is 15.36 second.  Data are based on a 2010 data reprocessing
by the PI team.  Parameter details below are based on the version of the data 
in CDAWeb.</Description>
      <Acknowledgement>User will acknowledge the IMP-8 magnetometer team,
and the data access path used, in any publication resulting from the use of 
these data.</Acknowledgement>
      <Contact>
        <PersonID>spase://SMWG/Person/Adam.Szabo</PersonID>
        <Role>PrincipalInvestigator</Role>
      </Contact>
      <InformationURL>
        <Name>IMP-8 Magnetometer Experiment Home Page</Name>
        <URL>https://wind.nasa.gov/imp8/</URL>
        <Description>A web site hosting instrument information and providing 
access to the data</Description>
      </InformationURL>
      <PriorID>spase://VMO/NumericalData/IMP8/MAG/PT15.36S</PriorID>
      <PriorID>spase://VSPO/NumericalData/IMP8/MAG/PT15.36S</PriorID>
    </ResourceHeader>
    <AccessInformation>
      <RepositoryID>spase://SMWG/Repository/NASA/GSFC/SPDF</RepositoryID>
      <Availability>Online</Availability>
      <AccessRights>Open</AccessRights>
      <AccessURL>
        <Name>FTPS from SPDF (not with most browsers)</Name>
        <URL>ftps://spdf.gsfc.nasa.gov/pub/data/imp/imp8/mag/</URL>
        <Description>An ftp repository hosting 15s magnetic field data from IMP-8.</Description>
      </AccessURL>
      <AccessURL>
        <Name>HTTPS from SPDF</Name>
        <URL>https://spdf.gsfc.nasa.gov/pub/data/imp/imp8/mag/</URL>
        <Description>In CDF via HTTP from SPDF</Description>
      </AccessURL>
      <Format>CDF</Format>
    </AccessInformation>
    <AccessInformation>
      <RepositoryID>spase://SMWG/Repository/NASA/GSFC/SPDF</RepositoryID>
      <Availability>Online</Availability>
      <AccessRights>Open</AccessRights>
      <AccessURL>
        <Name>CDAWeb</Name>
        <URL>https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=I8_15SEC_MAG&amp;index=sp_phys</URL>
        <ProductKey>I8_15SEC_MAG</ProductKey>
        <Description>Subset, plot and list data via CDAWeb</Description>
      </AccessURL>
      <AccessURL>
        <Name>FTPBrowser</Name>
        <URL>https://omniweb.sci.gsfc.nasa.gov/ftpbrowser/imp_mag15s.html</URL>
        <Description>Subset, plot and list data via FTPBrowser</Description>
      </AccessURL>
      <Format>Text</Format>
    </AccessInformation>
    <AccessInformation>
      <RepositoryID>spase://SMWG/Repository/NASA/GSFC/SPDF</RepositoryID>
      <Availability>Online</Availability>
      <AccessRights>Open</AccessRights>
      <AccessURL>
        <Name>CDAWeb HAPI Server</Name>
        <URL>https://cdaweb.gsfc.nasa.gov/hapi</URL>
        <Style>HAPI</Style>
        <ProductKey>I8_15SEC_MAG</ProductKey>
        <Description>Web Service to this product using the HAPI interface.</Description>
      </AccessURL>
      <Format>CSV</Format>
    </AccessInformation>
    <ProviderResourceName>IMP8 MAG15</ProviderResourceName>
    <ProviderProcessingLevel>Level 2</ProviderProcessingLevel>
    <ProviderVersion>3</ProviderVersion>
    <InstrumentID>spase://SMWG/Instrument/IMP8/MAG</InstrumentID>
    <MeasurementType>MagneticField</MeasurementType>
    <TemporalDescription>
      <TimeSpan>
        <StartDate>1973-10-30T15:00:32Z</StartDate>
        <StopDate>2000-06-10T15:09:18.720Z</StopDate>
        <Note>Instrument stopped working on 2000-06-10.</Note>
      </TimeSpan>
      <Cadence>PT15.36S</Cadence>
    </TemporalDescription>
    <ObservedRegion>Heliosphere.NearEarth</ObservedRegion>
    <ObservedRegion>Earth.Magnetosheath</ObservedRegion>
    <ObservedRegion>Earth.Magnetosphere.Magnetotail</ObservedRegion>
    <Caveats>The time resolution (cadence) is not constant. The time tag corresponds 
to the last 1.28s measurement in the 15.36s average.  Since the data is on average 
70% complete, this is quite often different from 15.36 seconds from the previous time 
tag. On average, however, it should be about 15.36 seconds.</Caveats>
    <Keyword>Magnetic field</Keyword>
    <Parameter>
      <Name>Epoch</Name>
      <ParameterKey>Epoch</ParameterKey>
      <Description>Epoch of the data point (last data in the 15.36-second average)</Description>
      <Cadence>PT15.36S</Cadence>
      <Units>Milliseconds</Units>
      <ValidMin>01-Jan-1973 00:00:00.000</ValidMin>
      <ValidMax>31-Dec-2000 00:00:00.000</ValidMax>
      <FillValue>-1.0e+31</FillValue>
      <Support>
        <SupportQuantity>Temporal</SupportQuantity>
      </Support>
    </Parameter>
    <Parameter>
      <Name>Number of Sequences</Name>
      <ParameterKey>N_Sequences</ParameterKey>
      <Description>The number of vectors used in the data average is 4 times this value.</Description>
      <Cadence>PT15.36S</Cadence>
      <ValidMin>0</ValidMin>
      <ValidMax>999</ValidMax>
      <FillValue>-2147483648</FillValue>
      <Support>
        <SupportQuantity>Other</SupportQuantity>
      </Support>
    </Parameter>
    <Parameter>
      <Name>Spacecraft Position GSE</Name>
      <ParameterKey>SC_Pos_GSE</ParameterKey>
      <Description>Spacecraft position in GSE coordinates</Description>
      <Cadence>PT15.36S</Cadence>
      <Units>Re</Units>
      <!-- Assuming the data processing used Re=6378km -->
      <UnitsConversion>6.378e6&gt;m</UnitsConversion>
      <CoordinateSystem>
        <CoordinateRepresentation>Cartesian</CoordinateRepresentation>
        <CoordinateSystemName>GSE</CoordinateSystemName>
      </CoordinateSystem>
      <Structure>
        <Size>3</Size>
        <Element>
          <Name>Xgse</Name>
          <Qualifier>Component.I</Qualifier>
          <Index>1</Index>
        </Element>
        <Element>
          <Name>Ygse</Name>
          <Qualifier>Component.J</Qualifier>
          <Index>2</Index>
        </Element>
        <Element>
          <Name>Zgse</Name>
          <Qualifier>Component.K</Qualifier>
          <Index>3</Index>
        </Element>
      </Structure>
      <ValidMin>-50.0</ValidMin>
      <ValidMax>50.0</ValidMax>
      <FillValue>-1.0e+31</FillValue>
      <Support>
        <SupportQuantity>Positional</SupportQuantity>
      </Support>
    </Parameter>
    <Parameter>
      <Name>Spacecraft Position GSM</Name>
      <ParameterKey>SC_Pos_GSM</ParameterKey>
      <Description>Spacecraft position in GSM coordinates</Description>
      <Cadence>PT15.36S</Cadence>
      <Units>Re</Units>
      <UnitsConversion>6.378e6&gt;m</UnitsConversion>
      <CoordinateSystem>
        <CoordinateRepresentation>Cartesian</CoordinateRepresentation>
        <CoordinateSystemName>GSM</CoordinateSystemName>
      </CoordinateSystem>
      <Structure>
        <Size>3</Size>
        <Element>
          <Name>Xgsm</Name>
          <Qualifier>Component.I</Qualifier>
          <Index>1</Index>
        </Element>
        <Element>
          <Name>Ygsm</Name>
          <Qualifier>Component.J</Qualifier>
          <Index>2</Index>
        </Element>
        <Element>
          <Name>Zgsm</Name>
          <Qualifier>Component.K</Qualifier>
          <Index>3</Index>
        </Element>
      </Structure>
      <ValidMin>-50.0</ValidMin>
      <ValidMax>50.0</ValidMax>
      <FillValue>-1.0e+31</FillValue>
      <Support>
        <SupportQuantity>Positional</SupportQuantity>
      </Support>
    </Parameter>
    <Parameter>
      <Name>B magnitude</Name>
      <ParameterKey>F1_Average_B_15s</ParameterKey>
      <Description>Magnitude of the magnetic field</Description>
      <Cadence>PT15.36S</Cadence>
      <Units>nT</Units>
      <UnitsConversion>1e-9&gt;T</UnitsConversion>
      <ValidMin>0.0</ValidMin>
      <ValidMax>100.0</ValidMax>
      <FillValue>-1.0e+31</FillValue>
      <Field>
        <Qualifier>Average</Qualifier>
        <Qualifier>Magnitude</Qualifier>
        <FieldQuantity>Magnetic</FieldQuantity>
      </Field>
    </Parameter>
    <Parameter>
      <Name>B vector GSE</Name>
      <ParameterKey>B_Vector_GSE</ParameterKey>
      <Description>Magnetic field vector in GSE coordinates</Description>
      <Cadence>PT15.36S</Cadence>
      <Units>nT</Units>
      <UnitsConversion>1e-9&gt;T</UnitsConversion>
      <CoordinateSystem>
        <CoordinateRepresentation>Cartesian</CoordinateRepresentation>
        <CoordinateSystemName>GSE</CoordinateSystemName>
      </CoordinateSystem>
      <Structure>
        <Size>3</Size>
        <Element>
          <Name>Bx GSE</Name>
          <Qualifier>Component.I</Qualifier>
          <Index>1</Index>
        </Element>
        <Element>
          <Name>By GSE</Name>
          <Qualifier>Component.J</Qualifier>
          <Index>2</Index>
        </Element>
        <Element>
          <Name>Bz GSE</Name>
          <Qualifier>Component.K</Qualifier>
          <Index>3</Index>
        </Element>
      </Structure>
      <ValidMin>-100.0</ValidMin>
      <ValidMax>100.0</ValidMax>
      <FillValue>-1.0e+31</FillValue>
      <Field>
        <Qualifier>Vector</Qualifier>
        <Qualifier>Average</Qualifier>
        <FieldQuantity>Magnetic</FieldQuantity>
      </Field>
    </Parameter>
    <Parameter>
      <Name>B vector GSM</Name>
      <ParameterKey>B_Vector_GSM</ParameterKey>
      <Description>Magnetic field vector in GSM coordinates</Description>
      <Cadence>PT15.36S</Cadence>
      <Units>nT</Units>
      <UnitsConversion>1e-9&gt;T</UnitsConversion>
      <CoordinateSystem>
        <CoordinateRepresentation>Cartesian</CoordinateRepresentation>
        <CoordinateSystemName>GSM</CoordinateSystemName>
      </CoordinateSystem>
      <Structure>
        <Size>3</Size>
        <Element>
          <Name>Bx GSM</Name>
          <Qualifier>Component.I</Qualifier>
          <Index>1</Index>
        </Element>
        <Element>
          <Name>By GSM</Name>
          <Qualifier>Component.J</Qualifier>
          <Index>2</Index>
        </Element>
        <Element>
          <Name>Bz GSM</Name>
          <Qualifier>Component.K</Qualifier>
          <Index>3</Index>
        </Element>
      </Structure>
      <ValidMin>-100.0</ValidMin>
      <ValidMax>100.0</ValidMax>
      <FillValue>-1.0e+31</FillValue>
      <Field>
        <Qualifier>Vector</Qualifier>
        <Qualifier>Average</Qualifier>
        <FieldQuantity>Magnetic</FieldQuantity>
      </Field>
    </Parameter>
    <Parameter>
      <Name>B Diagonal Variances</Name>
      <ParameterKey>B_jj_Variances</ParameterKey>
      <Description>Matrix containing magnetic field variances; diagonal elements Bxx, Byy, Bzz in GSE coordinates</Description>
      <Cadence>PT15.36S</Cadence>
      <Units>nT^2</Units>
      <UnitsConversion>1e-18&gt;T^2</UnitsConversion>
      <CoordinateSystem>
        <CoordinateRepresentation>Cartesian</CoordinateRepresentation>
        <CoordinateSystemName>GSE</CoordinateSystemName>
      </CoordinateSystem>
      <Structure>
        <Size>3</Size>
        <Element>
          <Name>Bxx GSE</Name>
          <Index>1</Index>
        </Element>
        <Element>
          <Name>Byy GSE</Name>
          <Index>2</Index>
        </Element>
        <Element>
          <Name>Bzz GSE</Name>
          <Index>3</Index>
        </Element>
      </Structure>
      <ValidMin>0.0</ValidMin>
      <ValidMax>5000.0</ValidMax>
      <FillValue>-1.0e+31</FillValue>
      <Field>
        <Qualifier>Variance</Qualifier>
        <FieldQuantity>Magnetic</FieldQuantity>
      </Field>
    </Parameter>
    <Parameter>
      <Name>B off-diagonal variances</Name>
      <ParameterKey>B_jk_Variances</ParameterKey>
      <Description>Matrix containing magnetic field variances; off-diagonal elements Byx, Bzx, Bzy in GSE coordinates</Description>
      <Cadence>PT15.36S</Cadence>
      <Units>nT^2</Units>
      <UnitsConversion>1e-18&gt;T^2</UnitsConversion>
      <CoordinateSystem>
        <CoordinateRepresentation>Cartesian</CoordinateRepresentation>
        <CoordinateSystemName>GSE</CoordinateSystemName>
      </CoordinateSystem>
      <Structure>
        <Size>3</Size>
        <Element>
          <Name>Byx GSE</Name>
          <Index>1</Index>
        </Element>
        <Element>
          <Name>Bzx GSE</Name>
          <Index>2</Index>
        </Element>
        <Element>
          <Name>Bzy GSE</Name>
          <Qualifier>Component.K</Qualifier>
          <Index>3</Index>
        </Element>
      </Structure>
      <ValidMin>-5000.0</ValidMin>
      <ValidMax>5000.0</ValidMax>
      <FillValue>-1.0e+31</FillValue>
      <Field>
        <Qualifier>Variance</Qualifier>
        <FieldQuantity>Magnetic</FieldQuantity>
      </Field>
    </Parameter>
  </NumericalData>
</Spase>
