<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  https://www.spase-group.org/data/schema/spase-2_5_0.xsd">
 <Version>2.5.0</Version>
 <NumericalData>
  <ResourceID>spase://CSA/NumericalData/GO-ABOVE/VLF/L2/PT1M</ResourceID>
  <ResourceHeader>
   <ResourceName>ABOVE Level-2 Amplitude and Phase of VLF transmitter
   signals</ResourceName>
   <ReleaseDate>2023-06-21T15:42:52</ReleaseDate>
   <Description>Amplitude and phase for narrowband transmitters at
   ABOVE sites. The Array for
   Broadband Observations of VLF/ELF Emissions (ABOVE) Level-2 CDF
   files of Amplitude, Phase and Bearing at 1 minute resolution for
   seven VLF transmitters as observed from each station of the ABOVE
   array.  

   The VLF transmitters observed are:
   
   NDK (LaMoure, North Dakota, 46.37 N, 98.33 W, 25.2 kHz)

   NAA (Cutler, Maine,  44.64 N, 67.29 W, 24.0 kHz),
   
   NLK (Seattle, Washington, 48.20 N 121.92 W, 24.8 kHz)

   NWC (Exmouth, Western Australia, 21.82 S, 114.16 E, 19.8 kHz)
   
   NPM (Lualualei, Hawaii, 21.42 N, 158.15 W, 21.4 kHz)

   NRK (Keflavik, Iceland, 63.85 N, 22.45 W, 37.5 kHz)

   WWVB (Fort Collins, Colorado, 40.68 N, 105.05 W, 60 kHz)

   GO-ABOVE is a ground‐based array of VLF radio receivers located across Canada and run as a part of the Canadian Space Agency&#039;s Geospace Observatory (GO). The ABOVE instruments are situated in two north‐south chains in Alberta and Manitoba, through the region roughly from L = 3 through L = 8.  The ABOVE instruments monitor electromagnetic waves in a frequency range from 100 Hz to 75 kHz, covering chorus and hiss emissions as well as U.S. Navy transmitters near 25 kHz. The absolute timing accuracy is 10 ns, from GPS.    
   </Description>
   <Acknowledgement>Please include the following in any publications using this data: Infrastructure funding for ABOVE is provided by the Canada Foundation for Innovation and the province of Alberta. ABOVE data used in this work was collected with the support of the Canadian Space Agency Geospace Observatory (GO Canada) contribution initiative.</Acknowledgement>
   <Contact>
    <PersonID>spase://SMWG/Person/C.M.Cully</PersonID>
    <Role>PrincipalInvestigator</Role>
   </Contact>
   <Contact>
    <PersonID>spase://SMWG/Person/Leonard.N.Garcia</PersonID>
    <Role>MetadataContact</Role>
   </Contact>
  </ResourceHeader>
  <AccessInformation>
   <RepositoryID>spase://CSA/Repository/UCalgary</RepositoryID>
         <AccessURL>
          <Name>GO-ABOVE CDFs for Athabasca (atha)</Name>
          <URL>https://hpde.io/CSA/NumericalData/GO-ABOVE/VLF/L2/Athabasca/PT1M.html</URL>
          <Description>Directory tree to access Level-1 and Level-2
	  CDF data at Athabasca, Alberta, Lat: 54.60, Lon: -113.65.</Description>
        </AccessURL>
        <AccessURL>
          <Name>GO-ABOVE CDFs for Barrier Lake (barr)</Name>
          <URL>https://hpde.io/CSA/NumericalData/GO-ABOVE/VLF/L2/BarrierLake/PT1M.html</URL>
          <Description>Directory tree to access Level-1 and Level-2
	  CDF data at Barrier Lake, Alberta, Lat: 51.01, Lon: -115.05.</Description>
        </AccessURL>
        <AccessURL>
          <Name>GO-ABOVE CDFs for Camrose (cmrs)</Name>
          <URL>https://hpde.io/CSA/NumericalData/GO-ABOVE/VLF/L2/Camrose/PT1M.html</URL>
          <Description>Directory tree to access Level-1 and Level-2
	  CDF data at Camrose, Alberta, Lat: 53.08, Lon: -112.54. </Description>
        </AccessURL>
	<AccessURL>
          <Name>GO-ABOVE CDFs for Fort McMurray (mcmu)</Name>
          <URL>https://hpde.io/CSA/NumericalData/GO-ABOVE/VLF/L2/FortMcMurray/PT1M.html</URL>
          <Description>Directory tree to access Level-1 and Level-2
	  CDF data at Fort McMurray, Alberta, Lat: 56.76, Lon: -111.58. </Description>
        </AccessURL>
	<AccessURL>
          <Name>GO-ABOVE CDFs for Fort Smith (fsmi)</Name>
          <URL>https://hpde.io/CSA/NumericalData/GO-ABOVE/VLF/L2/FortSmith/PT1M.html</URL>
          <Description>Directory tree to access Level-1 and Level-2
	  CDF data at Fort Smith, Manitoba, Lat: 59.99, Lon: -111.84. </Description>
        </AccessURL>
	<AccessURL>
          <Name>GO-ABOVE CDFs for Gillam (gill)</Name>
          <URL>https://hpde.io/CSA/NumericalData/GO-ABOVE/VLF/L2/Gillam/PT1M.html</URL>
          <Description>Directory tree to access Level-1 and Level-2
	  CDF data  at Gillam, Manitoba, Lat: 56.38, Lon: -94.64.</Description>
        </AccessURL>
	<AccessURL>
          <Name>GO-ABOVE CDFs for Island Lake (isll)</Name>
          <URL>https://hpde.io/CSA/NumericalData/GO-ABOVE/VLF/L2/IslandLake/PT1M.html</URL>
          <Description>Directory tree to access Level-1 and Level-2
	  CDF data  at Island Lake, Manitoba, Lat: 53.85, Lon: -94.66.</Description>
        </AccessURL>
	<AccessURL>
          <Name>GO-ABOVE CDFs for Lucky Lake (luck)</Name>
          <URL>https://hpde.io/CSA/NumericalData/GO-ABOVE/VLF/L2/LuckyLake/PT1M.html</URL>
          <Description>Directory tree to access Level-1 and Level-2
	  CDF data at Lucky Lake, Saskatchewan, Lat: 51.15, Lon: -107.26.</Description>
        </AccessURL>
	<AccessURL>
          <Name>GO-ABOVE CDFs for Pinawa (pina)</Name>
          <URL>https://hpde.io/CSA/NumericalData/GO-ABOVE/VLF/L2/Pinawa/PT1M.html</URL>
          <Description>Directory tree to access Level-1 and Level-2
	  CDF data at Pinawa, Manitoba, Lat: 50.16, Lon: -96.08.</Description>
        </AccessURL>
   <Format>CDF</Format>
  </AccessInformation>
  <InstrumentID>spase://SMWG/Instrument/Athabasca/VLF</InstrumentID>
  <MeasurementType>Waves.Passive</MeasurementType>
  <TemporalDescription>
   <TimeSpan>
    <StartDate>2014-08-13T18:00:00</StartDate>
    <StopDate>2019-10-01T05:45:00</StopDate>
   </TimeSpan>
   <Cadence>PT1M</Cadence>
  </TemporalDescription>
  <SpectralRange>RadioFrequency</SpectralRange>
  <ObservedRegion>Earth.NearSurface.Ionosphere</ObservedRegion>
  <Parameter>
   <Name>Epoch</Name>
   <Support>
    <SupportQuantity>Temporal</SupportQuantity>
   </Support>
  </Parameter>
  <Parameter>
    <Name>Phase ndk-(GO-ABOVE station)</Name>
    <ParameterKey>abv_phase_(GO-ABOVE station)_ndk</ParameterKey>
   <Description>Phase of VLF transmitter NDK observed at (GO-ABOVE station).
Phases for upper (space) and lower (mark) frequencies have been combined. Phase is calculated along direction of maximum amplitude.</Description>
   <Units>radians</Units>
   <Field>
    <Qualifier>PhaseAngle</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Amplitude ndk-(GO-ABOVE station)</Name>
    <ParameterKey>abv_amp_(GO-ABOVE station)_ndk</ParameterKey>
   <Description>Amplitude of VLF transmitter NDK observed at (GO-ABOVE station).
Amplitude is calculated separately for North-South and East-West antennas.</Description>
   <Units>ADC units</Units>
   <Field>
    <Qualifier>Average</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Bearing ndk-(GO-ABOVE station)</Name>
    <ParameterKey>abv_bearing_(GO-ABOVE station)_ndk</ParameterKey>
   <Description>Bearing to VLF transmitter NDK observed at (GO-ABOVE station).
Bearing direction is based on amplitudes from the 2 antennas and always between 0 (N/S) and 90 (E/W) degrees.
</Description>
   <Units>degrees</Units>
   <Field>
    <Qualifier>DirectionAngle</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Phase naa-(GO-ABOVE station)</Name>
    <ParameterKey>abv_phase_(GO-ABOVE station)_naa</ParameterKey>
   <Description>Phase of VLF transmitter NAA observed at (GO-ABOVE station).
Phases for upper (space) and lower (mark) frequencies have been combined. Phase is calculated along direction of maximum amplitude.</Description>
   <Units>radians</Units>
   <Field>
    <Qualifier>PhaseAngle</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Amplitude naa-(GO-ABOVE station)</Name>
    <ParameterKey>abv_amp_(GO-ABOVE station)_naa</ParameterKey>
   <Description>Amplitude of VLF transmitter NAA observed at (GO-ABOVE station).
Amplitude is calculated separately for North-South and East-West antennas.</Description>
   <Units>ADC units</Units>
   <Field>
    <Qualifier>Average</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Bearing naa-(GO-ABOVE station)</Name>
    <ParameterKey>abv_bearing_(GO-ABOVE station)_naa</ParameterKey>
   <Description>Bearing to VLF transmitter NAA observed at (GO-ABOVE station).
Bearing direction is based on amplitudes from the 2 antennas and always between 0 (N/S) and 90 (E/W) degrees.
</Description>
   <Units>degrees</Units>
   <Field>
    <Qualifier>DirectionAngle</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Phase nlk-(GO-ABOVE station)</Name>
    <ParameterKey>abv_phase_(GO-ABOVE station)_nlk</ParameterKey>
   <Description>Phase of VLF transmitter NLK observed at (GO-ABOVE station).
Phases for upper (space) and lower (mark) frequencies have been combined. Phase is calculated along direction of maximum amplitude.</Description>
   <Units>radians</Units>
   <Field>
    <Qualifier>PhaseAngle</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Amplitude nlk-(GO-ABOVE station)</Name>
    <ParameterKey>abv_amp_(GO-ABOVE station)_nlk</ParameterKey>
   <Description>Amplitude of VLF transmitter NLK observed at (GO-ABOVE station).
Amplitude is calculated separately for North-South and East-West antennas.</Description>
   <Units>ADC units</Units>
   <Field>
    <Qualifier>Average</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Bearing nlk-(GO-ABOVE station)</Name>
    <ParameterKey>abv_bearing_(GO-ABOVE station)_nlk</ParameterKey>
   <Description>Bearing to VLF transmitter NLK observed at (GO-ABOVE station).
Bearing direction is based on amplitudes from the 2 antennas and always between 0 (N/S) and 90 (E/W) degrees.
</Description>
   <Units>degrees</Units>
   <Field>
    <Qualifier>DirectionAngle</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Phase nwc-(GO-ABOVE station)</Name>
    <ParameterKey>abv_phase_(GO-ABOVE station)_nwc</ParameterKey>
   <Description>Phase of VLF transmitter NWC observed at (GO-ABOVE station).
Phases for upper (space) and lower (mark) frequencies have been combined. Phase is calculated along direction of maximum amplitude.</Description>
   <Units>radians</Units>
   <Field>
    <Qualifier>PhaseAngle</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Amplitude nwc-(GO-ABOVE station)</Name>
    <ParameterKey>abv_amp_(GO-ABOVE station)_nwc</ParameterKey>
   <Description>Amplitude of VLF transmitter NWC observed at (GO-ABOVE station).
Amplitude is calculated separately for North-South and East-West antennas.</Description>
   <Units>ADC units</Units>
   <Field>
    <Qualifier>Average</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Bearing nwc-(GO-ABOVE station)</Name>
    <ParameterKey>abv_bearing_(GO-ABOVE station)_nwc</ParameterKey>
   <Description>Bearing to VLF transmitter NWC observed at (GO-ABOVE station).
Bearing direction is based on amplitudes from the 2 antennas and always between 0 (N/S) and 90 (E/W) degrees.
</Description>
   <Units>degrees</Units>
   <Field>
    <Qualifier>DirectionAngle</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Phase npm-(GO-ABOVE station)</Name>
    <ParameterKey>abv_phase_(GO-ABOVE station)_npm</ParameterKey>
   <Description>Phase of VLF transmitter NPM observed at (GO-ABOVE station).
Phases for upper (space) and lower (mark) frequencies have been combined. Phase is calculated along direction of maximum amplitude.</Description>
   <Units>radians</Units>
   <Field>
    <Qualifier>PhaseAngle</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Amplitude npm-(GO-ABOVE station)</Name>
    <ParameterKey>abv_amp_(GO-ABOVE station)_npm</ParameterKey>
   <Description>Amplitude of VLF transmitter NPM observed at (GO-ABOVE station).
Amplitude is calculated separately for North-South and East-West antennas.</Description>
   <Units>ADC units</Units>
   <Field>
    <Qualifier>Average</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Bearing npm-(GO-ABOVE station)</Name>
    <ParameterKey>abv_bearing_(GO-ABOVE station)_npm</ParameterKey>
   <Description>Bearing to VLF transmitter NPM observed at (GO-ABOVE station).
Bearing direction is based on amplitudes from the 2 antennas and always between 0 (N/S) and 90 (E/W) degrees.
</Description>
   <Units>degrees</Units>
   <Field>
    <Qualifier>DirectionAngle</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Phase nrk-(GO-ABOVE station)</Name>
    <ParameterKey>abv_phase_(GO-ABOVE station)_nrk</ParameterKey>
   <Description>Phase of VLF transmitter NRK observed at (GO-ABOVE station).
Phases for upper (space) and lower (mark) frequencies have been combined. Phase is calculated along direction of maximum amplitude.</Description>
   <Units>radians</Units>
   <Field>
    <Qualifier>PhaseAngle</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Amplitude nrk-(GO-ABOVE station)</Name>
    <ParameterKey>abv_amp_(GO-ABOVE station)_nrk</ParameterKey>
   <Description>Amplitude of VLF transmitter NRK observed at (GO-ABOVE station).
Amplitude is calculated separately for North-South and East-West antennas.</Description>
   <Units>ADC units</Units>
   <Field>
    <Qualifier>Average</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Bearing nrk-(GO-ABOVE station)</Name>
    <ParameterKey>abv_bearing_(GO-ABOVE station)_nrk</ParameterKey>
   <Description>Bearing to VLF transmitter NRK observed at (GO-ABOVE station).
Bearing direction is based on amplitudes from the 2 antennas and always between 0 (N/S) and 90 (E/W) degrees.
</Description>
   <Units>degrees</Units>
   <Field>
    <Qualifier>DirectionAngle</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Phase wwvb-(GO-ABOVE station)</Name>
    <ParameterKey>abv_phase_(GO-ABOVE station)_wwvb</ParameterKey>
   <Description>Phase of VLF transmitter WWVB observed at (GO-ABOVE station).
Phases for upper (space) and lower (mark) frequencies have been combined. Phase is calculated along direction of maximum amplitude.</Description>
   <Units>radians</Units>
   <Field>
    <Qualifier>PhaseAngle</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Amplitude wwvb-(GO-ABOVE station)</Name>
    <ParameterKey>abv_amp_(GO-ABOVE station)_wwvb</ParameterKey>
   <Description>Amplitude of VLF transmitter WWVB observed at (GO-ABOVE station).
Amplitude is calculated separately for North-South and East-West antennas.</Description>
   <Units>ADC units</Units>
   <Field>
    <Qualifier>Average</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
  <Parameter>
    <Name>Bearing wwvb-(GO-ABOVE station)</Name>
    <ParameterKey>abv_bearing_(GO-ABOVE station)_wwvb</ParameterKey>
   <Description>Bearing to VLF transmitter WWVB observed at (GO-ABOVE station).
Bearing direction is based on amplitudes from the 2 antennas and always between 0 (N/S) and 90 (E/W) degrees.
</Description>
   <Units>degrees</Units>
   <Field>
    <Qualifier>DirectionAngle</Qualifier>
    <FieldQuantity>Magnetic</FieldQuantity>
   </Field>
  </Parameter>
 </NumericalData>
</Spase>
