{
  "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_3_2.xsd",
    "Version": "2.3.2",
    "NumericalData": {
      "ResourceID": "spase://NASA/NumericalData/POLAR/PWI/LHFWR/2kHz/PT0.000224S",
      "ResourceHeader": {
        "ResourceName": "Polar Plasma Wave Instrument, High Frequency Waveform Receiver, 2 kHz, Time Domain Fields",
        "ReleaseDate": "2021-04-27T15:38:11Z",
        "Description": "PWI>Plasma Wave Instrument Reference:  Gurnett, D.A., et al., The Polar Plasma Wave Instrument, Space Science Reviews, Vol. 71, pp. 597-622, 1995.  donald-gurnett@uiowa.edu  An FFT on 2048 values was used in calibrating the data; i.e., perform FFT, calibrate in frequency domain, perform inverse FFT to get calibrated time series.  The coordinate system used is local magnetic field-aligned, a spacecraft centered coordinate system where Z is parallel to the local B-field determined from Polar MFE, X points outward and lies in the plane defined by the Z-axis and the radial vector from the earth to the spacecraft, and Y completes a right-handed system and points eastward. The X- and Z-axes are contained in the north-south plane.  Effective Bandwidth is 1.5*delta_f, where delta_f depends on the size of the FFT used to convert to the frequency domain, and delta_t.  The unattenuated frequency range for this file type is 20Hz to 2000Hz.  These data come in snapshots of 2048 samples per channel, every 128.8 seconds, with a cadence equal to the inverse of the sampling rate (4464 Hz), and individual time tags given in CDF TT2000 format.  For a description of the PWI receivers and the different operational modes see https://space.physics.uiowa.edu/plasma-wave/polar/modes.html",
        "Acknowledgement": "U. Iowa, Donald. A. Gurnett",
        "Contact": [
          {
            "PersonID": "spase://SMWG/Person/Donald.A.Gurnett",
            "Role": "PrincipalInvestigator"
          },
          {
            "PersonID": "spase://SMWG/Person/J.Douglas.Menietti",
            "Role": "Scientist"
          },
          {
            "PersonID": "spase://SMWG/Person/Jeremy.Faden",
            "Role": "MetadataContact"
          }
        ],
        "InformationURL": {
          "Name": "Polar Plasma Wave Investigation (PWI) Data and User's Guides",
          "URL": "https://space.physics.uiowa.edu/plasma-wave/polar/data.html",
          "Description": "A Polar PWI page is maintained at the University of Iowa with descriptions of receivers, interpretation issues, user's guides, and data availability tables.",
          "Language": "en"
        }
      },
      "AccessInformation": [
        {
          "RepositoryID": "spase://SMWG/Repository/UIowa/RadioPlasmaWaveGroup",
          "Availability": "Online",
          "AccessRights": "Open",
          "AccessURL": {
            "Name": "POLAR PWI H4 data web access",
            "URL": "https://space.physics.uiowa.edu/plasma-wave/polar/po_h4_pwi/",
            "Description": "HTTPS access to directories with Polar PWI H4 data files"
          },
          "Format": "CDF",
          "Encoding": "None",
          "Acknowledgement": "UIowa, Donald A. Gurnett"
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "AccessURL": [
            {
              "Name": "FTPS from SPDF (not with most browsers)",
              "URL": "ftps://spdf.gsfc.nasa.gov/pub/data/polar/pwi/pwi_h4",
              "Description": "In CDF via FTPS from SPDF"
            },
            {
              "Name": "HTTPS from SPDF",
              "URL": "https://spdf.gsfc.nasa.gov/pub/data/polar/pwi/pwi_h4",
              "Description": "In CDF via HTTPS from SPDF"
            }
          ],
          "Format": "CDF",
          "Encoding": "None",
          "Acknowledgement": "U. Iowa, Donald. A. Gurnett and the Space Physics Data Facility at NASA/GSFC"
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "AccessURL": {
            "Name": "CDAWeb",
            "URL": "https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=PO_H4_PWI&index=sp_phys",
            "ProductKey": "PO_H4_PWI",
            "Description": "Plots, lists and files from CDAWeb of the data resource:PO_H4_PWI"
          },
          "Format": "Text"
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "AccessURL": {
            "Name": "CDAWeb HAPI Server",
            "URL": "https://cdaweb.gsfc.nasa.gov/hapi",
            "Style": "HAPI",
            "ProductKey": [
              "PO_H4_PWI@0",
              "PO_H4_PWI@1"
            ],
            "Description": "Web Service to this product using the HAPI interface."
          },
          "Format": "CSV"
        }
      ],
      "InstrumentID": "spase://SMWG/Instrument/POLAR/PWI",
      "MeasurementType": "Waves.Passive",
      "TemporalDescription": {
        "TimeSpan": {
          "StartDate": "1996-03-26T00:00:00.000",
          "StopDate": "1997-09-17T00:00:00.000",
          "Note": "The cadence value given here is computed from the inverse of the sampling rate (4464 Hz)."
        },
        "Cadence": "PT0.000224S"
      },
      "Keyword": [
        "CDF Global Attribute TITLE: POLAR PWI HFWR",
        "CDF Global Attribute MISSION_GROUP: Polar CDF Global Attribute MISSION_GROUP: Magnetospheric Data",
        "CDF Global Attribute PROJECT: ISTP>International Solar-Terrestrial Physics",
        "CDF Global Attribute DATA_VERSION: 3",
        "CDF Global Attribute DISCIPLINE: Space Physics>Magnetospheric Science",
        "CDF Global Attribute DATA_TYPE: H4>LHFWR 2KHz (6 channels)",
        "CDF Global Attribute ADID_REF: NSSD0171",
        "CDF Global Attribute MODS: Created Mar 2021",
        "Auroral hiss",
        "Chorus",
        "Continuum radiation",
        "Equatorial Noise",
        "Plasmaspheric Hiss",
        "Langmuir Waves",
        "Electostatic Solitary Waves",
        "ESW",
        "Whistlers",
        "Ion Acoustic Waves",
        "Bernstein Waves",
        "Upper Hybrid Waves",
        "Lower Hybrid Waves"
      ],
      "Parameter": [
        {
          "Name": "Time",
          "ParameterKey": "Epoch",
          "Description": "Time, CDF TT2000 time of HFWR 2 kHz value",
          "Units": "ns",
          "RenderingHints": {
            "AxisLabel": "Epoch"
          },
          "ValidMin": "1996-02-27T00:00:00.000000000",
          "ValidMax": "2008-04-29T00:00:00.000000000",
          "FillValue": "-9223372036854775808",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Gain for HFWR Channel 1 (Ex)",
          "Set": "This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation.",
          "ParameterKey": "Gain 1",
          "Description": "Channel 1 Gain (HFWR 2 kHz)",
          "RenderingHints": {
            "AxisLabel": "HFWR_2K_Ex_Gain",
            "ValueFormat": "I2"
          },
          "ValidMin": "0",
          "ValidMax": "30",
          "FillValue": "-1",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Gain for HFWR Channel 2 (Ey)",
          "Set": "This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation.",
          "ParameterKey": "Gain2",
          "Description": "Channel 2 Gain (HFWR 2 kHz)",
          "RenderingHints": {
            "AxisLabel": "HFWR_2K_Ey_Gain",
            "ValueFormat": "I2"
          },
          "ValidMin": "0",
          "ValidMax": "30",
          "FillValue": "-1",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Gain for HFWR Channel 3 (Ez)",
          "Set": "This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation.",
          "ParameterKey": "Gain3",
          "Description": "Channel 3 Gain (HFWR 2 kHz)",
          "RenderingHints": {
            "AxisLabel": "HFWR_2K_Ez_Gain",
            "ValueFormat": "I2"
          },
          "ValidMin": "0",
          "ValidMax": "30",
          "FillValue": "-1",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Gain for HFWR 16 kHz M-Field (Bx, By, Bz)",
          "Set": "This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation.",
          "ParameterKey": "MGain",
          "Description": "M Gain (HFWR 2 kHz)",
          "Caveats": "Applies to all 3 Magnetic Channels",
          "RenderingHints": {
            "AxisLabel": "HFWR_2K_MGain",
            "ValueFormat": "I2"
          },
          "ValidMin": "0",
          "ValidMax": "30",
          "FillValue": "-1",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "HFWR 2 kHz Elec Field Antenna Ex",
          "Set": "This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): HFWR Elec Field Antenna Ex (perp and outward in Local-Field Aligned/LFA coords).",
          "ParameterKey": "HFWR_Ex2K",
          "Description": "HFWR 2 kHz Elec Field Antenna Ex (perp and outward in Local-Field-Aligned/LFA coords)",
          "Units": "mV/m",
          "RenderingHints": {
            "AxisLabel": "HFWR_Ex2K",
            "ValueFormat": "E12.4"
          },
          "ValidMin": "-30.0",
          "ValidMax": "30.0",
          "FillValue": "-1.0e+31",
          "Wave": {
            "WaveType": "PlasmaWaves",
            "WaveQuantity": "ACElectricField"
          }
        },
        {
          "Name": "HFWR 2 kHz Elec. Field Antenna Ey",
          "Set": "This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): HFWR Elec Field Antenna Ey (perp and eastward in Local-Field Aligned/LFA coords).",
          "ParameterKey": "HFWR_Ey2K",
          "Description": "HFWR 2 kHz Elec Field Antenna Ey (perp and eastward in Local-Field-Aligned/LFA coords)",
          "Units": "mV/m",
          "RenderingHints": {
            "AxisLabel": "HFWR_Ey2K",
            "ValueFormat": "E12.4"
          },
          "ValidMin": "-30.0",
          "ValidMax": "30.0",
          "FillValue": "-1.0e+31",
          "Wave": {
            "WaveType": "PlasmaWaves",
            "WaveQuantity": "ACElectricField"
          }
        },
        {
          "Name": "HFWR 2 kHz Elec. Field Antenna Ez",
          "Set": "This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): HFWR Elec Field Antenna Ez (parallel in Local-Field Aligned/LFA coords).",
          "ParameterKey": "HFWR_Ez2K",
          "Description": "HFWR 2 kHz Elec Field Antenna Ez (parallel in Local-Field-Aligned/LFA coords)",
          "Units": "mV/m",
          "RenderingHints": {
            "AxisLabel": "HFWR_Ez2K",
            "ValueFormat": "E12.4"
          },
          "ValidMin": "-30.0",
          "ValidMax": "30.0",
          "FillValue": "-1.0e+31",
          "Wave": {
            "WaveType": "PlasmaWaves",
            "WaveQuantity": "ACElectricField"
          }
        },
        {
          "Name": "HFWR 2 kHz Mag. Field Antenna Bx",
          "Set": "This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): HFWR Mag Field Antenna Bx (perp and outward in Local-Field Aligned/LFA coords).",
          "ParameterKey": "HFWR_Bx2K",
          "Description": "HFWR 2 kHz Mag Field Antenna Bx (perp and outward in Local-Field-Aligned/LFA coords)",
          "Units": "nT",
          "RenderingHints": {
            "AxisLabel": "HFWR_Bx2K",
            "ValueFormat": "E12.4"
          },
          "ValidMin": "-50.0",
          "ValidMax": "50.0",
          "FillValue": "-1.0e+31",
          "Wave": {
            "WaveType": "PlasmaWaves",
            "WaveQuantity": "ACMagneticField"
          }
        },
        {
          "Name": "HFWR 2 kHz Mag. Field Antenna By",
          "Set": "This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): HFWR Mag Field Antenna By (perp and eastward in Local-Field Aligned/LFA coords).",
          "ParameterKey": "HFWR_By2K",
          "Description": "HFWR 2 kHz Mag Field Antenna By (perp and eastward in Local-Field-Aligned/LFA coords)",
          "Units": "nT",
          "RenderingHints": {
            "AxisLabel": "HFWR_By2K",
            "ValueFormat": "E12.4"
          },
          "ValidMin": "-50.0",
          "ValidMax": "50.0",
          "FillValue": "-1.0e+31",
          "Wave": {
            "WaveType": "PlasmaWaves",
            "WaveQuantity": "ACMagneticField"
          }
        },
        {
          "Name": "HFWR 2 kHz Mag. Field Antenna Bz",
          "Set": "This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): HFWR Mag Field Antenna Bz (parallel in Local-Field Aligned/LFA coords).",
          "ParameterKey": "HFWR_Bz2K",
          "Description": "HFWR 2 kHz Mag Field Antenna Bz (parallel in Local-Field-Aligned/LFA coords)",
          "Units": "nT",
          "RenderingHints": {
            "AxisLabel": "HFWR_Bz2K",
            "ValueFormat": "E12.4"
          },
          "ValidMin": "-50.0",
          "ValidMax": "50.0",
          "FillValue": "-1.0e+31",
          "Wave": {
            "WaveType": "PlasmaWaves",
            "WaveQuantity": "ACMagneticField"
          }
        },
        {
          "Name": "DATA_QUALITY",
          "Set": "This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): Data Quality for Ex components (0 = OK, 1 = clipped or questionable).",
          "ParameterKey": "DATA_QUALITY",
          "Description": "DATA_QUALITY 0 = OK, 1 = poor",
          "Units": "(0=OK,1=Poor)",
          "RenderingHints": {
            "AxisLabel": "DATA_QUALITY",
            "ValueFormat": "I1"
          },
          "ValidMin": "0",
          "ValidMax": "1",
          "FillValue": "-1",
          "Support": {
            "SupportQuantity": "Other"
          }
        }
      ]
    }
  }
}