<?xml version="1.0" encoding="UTF-8"?>
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  <Version>2.3.2</Version>
  <NumericalData>
    <ResourceID>spase://NASA/NumericalData/STEREO-A/IMPACT/MAG/L1/PT0.125S</ResourceID>
    <ResourceHeader>
      <ResourceName>STEREO-A In-situ Measurements of Particles And CME Transients (IMPACT) Magnetic Field Vectors and Ancillary Data</ResourceName>
      <AlternateName>STEREO-A IMPACT/MAG Level 1 Data</AlternateName>
      <ReleaseDate>2021-04-27T15:38:11Z</ReleaseDate>
      <Description>This data product contains Level 1 0.125-s values of solar wind magnetic field data taken by the IMPACT/Magnetometer on STEREO-A. The interface at UCB provides access to CDF-formatted files of magnetic field data in RTN coordinates. The interface at UCLA allows selection of STEREO A or STEREO B data and of vector quantities in RTN or spacecraft coordinates. It also allows selection of either of two parameter sets: [Bx, By, Bz,  B ] or [RBx, RBy, RBz,  B , cone and clock angles]. Further, this interface enables easy migration between plot vs. ASCII data presentation options and among the three available resolutions (1, 8, 32 Hz). The parameter level information given below is specific to tyhe CDF version of the data at UCB.</Description>
      <Acknowledgement>The STEREO IMPACT/MAG Team</Acknowledgement>
      <Contact>
        <PersonID>spase://SMWG/Person/Peter.Schroeder</PersonID>
        <Role>DataProducer</Role>
      </Contact>
      <Contact>
        <PersonID>spase://SMWG/Person/Janet.G.Luhmann</PersonID>
        <Role>PrincipalInvestigator</Role>
      </Contact>
      <InformationURL>
        <Name>STEREO IMPACT Mission Site</Name>
        <URL>http://sprg.ssl.berkeley.edu/impact/</URL>
        <Description>The web site provides detailed descriptions of the STEREO IMPACT MAG instrument as well as associated data sets.</Description>
      </InformationURL>
      <PriorID>spase://VHO/NumericalData/STEREO-A/IMPACT/MAG/L1_PT0.125S</PriorID>
      <PriorID>spase://VSPO/NumericalData/STEREO-A/IMPACT/MAG/PT1S</PriorID>
      <PriorID>spase://VSPO/NumericalData/STEREO-A/IMPACT/MAG/L1/PT0.125S</PriorID>
    </ResourceHeader>
    <AccessInformation>
      <RepositoryID>spase://SMWG/Repository/STEREO/IMPACT</RepositoryID>
      <Availability>Online</Availability>
      <AccessRights>Open</AccessRights>
      <AccessURL>
        <Name>Download of STEREO-A IMPACT/MAG Level 1 data</Name>
        <URL>http://stereo.ssl.berkeley.edu/l1data/ahead/mag/RTN/</URL>
        <Description>A web site hosting the STEREO-A IMPACT/MAG Level 1 data</Description>
      </AccessURL>
      <Format>CDF</Format>
      <Encoding>None</Encoding>
    </AccessInformation>
    <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/stereo/ahead/l1/impact/rtn/mag/</URL>
        <Description>FTP repository of Level1 magnetic field vectors form the IMPACT/MAG instrument in CDF format at CDAWeb</Description>
      </AccessURL>
      <AccessURL>
        <Name>HTTPS from SPDF</Name>
        <URL>https://spdf.gsfc.nasa.gov/pub/data/stereo/ahead/l1/impact/rtn/mag/</URL>
        <Description>In CDF via HTTP from SPDF</Description>
      </AccessURL>
      <Format>CDF</Format>
      <Acknowledgement>Please acknowledge the Principal Investigator Janet Luhmann and the CDAWeb team at GSFC/SPDF.</Acknowledgement>
    </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=STA_L1_MAG_RTN&amp;index=sp_phys</URL>
        <ProductKey>STA_L1_MAG_RTN</ProductKey>
        <Description>Level 1 magnetic field vectors data from the IMPACT/MAG instrument on the STEREO Behind spacecraft with subset, plot, list from CDAWeb</Description>
      </AccessURL>
      <Format>Text</Format>
      <Acknowledgement>Please acknowledge the Principal Investigator Janet Luhmann and the CDAWeb team at GSFC/SPDF.</Acknowledgement>
    </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>STA_L1_MAG_RTN</ProductKey>
        <Description>Web Service to this product using the HAPI interface.</Description>
      </AccessURL>
      <Format>CSV</Format>
      <Acknowledgement>Please acknowledge the Principal Investigator Janet Luhmann and the CDAWeb team at GSFC/SPDF.</Acknowledgement>
    </AccessInformation>
    <ProviderResourceName>STEREO-A IMPACT/MAG Level 1 Data</ProviderResourceName>
    <ProviderProcessingLevel>1</ProviderProcessingLevel>
    <ProviderVersion>3</ProviderVersion>
    <InstrumentID>spase://SMWG/Instrument/STEREO-A/IMPACT/MAG</InstrumentID>
    <MeasurementType>MagneticField</MeasurementType>
    <TemporalDescription>
      <TimeSpan>
        <StartDate>2006-11-08T00:00:00Z</StartDate>
        <RelativeStopDate>-P01M</RelativeStopDate>
      </TimeSpan>
      <Cadence>PT0.125S</Cadence>
    </TemporalDescription>
    <ObservedRegion>Heliosphere.Remote1AU</ObservedRegion>
    <Caveats>Current version of the data include very fast (subsecond) glitches in the magnetometer's X sensor. Magnitude of these glitches are approximately 0.5 nT and occur at varying frequencies throughout the mission.</Caveats>
    <Parameter>
      <Name>Time</Name>
      <ParameterKey>Epoch</ParameterKey>
      <Description>Number of milliseconds since 0 AD</Description>
      <Caveats>Interval-centered time tag</Caveats>
      <Units>ms</Units>
      <UnitsConversion>1.0e-3&gt;s</UnitsConversion>
      <ValidMin>01-Jan-1990 00:00:00.000</ValidMin>
      <ValidMax>31-Dec-2020 00:00:00.000</ValidMax>
      <FillValue>31-Dec-9999 23:59:59.999</FillValue>
      <Support>
        <SupportQuantity>Temporal</SupportQuantity>
      </Support>
    </Parameter>
    <Parameter>
      <Name>Magnetic Field Vector in RTN Coordinates</Name>
      <ParameterKey>BFIELD</ParameterKey>
      <Description>Magnetic field vectors as measured by the IMPACT/MAG instrument in RTN coordinate system.</Description>
      <Units>nT</Units>
      <UnitsConversion>1.0e-9&gt;T</UnitsConversion>
      <CoordinateSystem>
        <CoordinateRepresentation>Cartesian</CoordinateRepresentation>
        <CoordinateSystemName>RTN</CoordinateSystemName>
      </CoordinateSystem>
      <Structure>
        <Size>4</Size>
        <Element>
          <Name>Bx</Name>
          <Qualifier>Component.I</Qualifier>
          <Index>1</Index>
          <ValidMin>-Infinity</ValidMin>
          <ValidMax>Infinity</ValidMax>
          <FillValue>-1.0E31</FillValue>
        </Element>
        <Element>
          <Name>By</Name>
          <Qualifier>Component.J</Qualifier>
          <Index>2</Index>
          <ValidMin>-Infinity</ValidMin>
          <ValidMax>Infinity</ValidMax>
          <FillValue>-1.0E31</FillValue>
        </Element>
        <Element>
          <Name>Bz</Name>
          <Qualifier>Component.K</Qualifier>
          <Index>3</Index>
          <ValidMin>-Infinity</ValidMin>
          <ValidMax>Infinity</ValidMax>
          <FillValue>-1.0E31</FillValue>
        </Element>
        <Element>
          <Name>B Magnitude</Name>
          <Index>4</Index>
          <ValidMin>-Infinity</ValidMin>
          <ValidMax>Infinity</ValidMax>
          <FillValue>-1.0E31</FillValue>
        </Element>
      </Structure>
      <Field>
        <Qualifier>Vector</Qualifier>
        <FieldQuantity>Magnetic</FieldQuantity>
      </Field>
    </Parameter>
    <Parameter>
      <Name>MAG Flag</Name>
      <Description>Error Flag - bit 0:3 Mag Error counter bit 4:7 Mag Command counter bit 8 spare bit 9 First bit 10 Time bit 11 Interface Parity Error (0=OK, 1=Fault) bit 12 Interface Timeout Error (0=OK, 1=Fault) bit 13 ADC Cal (0=OFF, 1=ON) bit 14 In Flight Cal (0=OFF, 1=ON) bit 15 Range (0=low fields, high sensitivity, 1=high fields, low sen bit 16 Calibration (0=old cal, 1=new cal) bit 17 STEREO STEPPING For X-axis bit 18:31 spare</Description>
      <ValidMin>0</ValidMin>
      <ValidMax>4294967295</ValidMax>
      <Support>
        <SupportQuantity>Other</SupportQuantity>
      </Support>
    </Parameter>
  </NumericalData>
</Spase>
