{
  "Spase": {
    "xmlns": "http://www.spase-group.org/data/schema",
    "xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance",
    "xsi:schemaLocation": "https://www.spase-group.org/data/schema https://www.spase-group.org/data/schema/spase-2.7.1.xsd",
    "Version": "2.7.1",
    "MetadataRightsList": {
      "Rights": {
        "SchemeURI": "https://spdx.org/licenses/",
        "RightsIdentifierScheme": "SPDX",
        "RightsIdentifier": "CC0-1.0",
        "RightsURI": "https://spdx.org/licenses/CC0-1.0.html",
        "RightsName": "Creative Commons Zero v1.0 Universal",
        "Note": "CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions"
      }
    },
    "NumericalData": {
      "ResourceID": "spase://NASA/NumericalData/POLAR/PWI/LFWR/PT0.01S",
      "NamingAuthority": "NASA",
      "ResourceType": "NumericalData",
      "ResourceHeader": {
        "ResourceName": "Polar Plasma Wave Instrument (PWI), Low Frequency Waveform Receiver, ~0.01 sec resolution fields",
        "AlternateName": "PO_H2_PWI",
        "DOI": "https://doi.org/10.48322/xbm6-4c53",
        "ReleaseDate": "2025-12-04T13:31:02Z",
        "RevisionHistory": {
          "RevisionEvent": [
            {
              "ReleaseDate": "2021-04-27T15:38:11",
              "Note": "Only known prior ReleaseDate of the metadata"
            },
            {
              "ReleaseDate": "2023-07-30T12:34:56.789",
              "Note": "Added DOI and PublicationInfo minted by LFB, metadata versioned up to SPASE 2.6.0, reviewed by LFB 20230727"
            },
            {
              "ReleaseDate": "2025-10-03T10:48:56Z",
              "Note": "Updated PublishedBy name to match ROR Registry. Added ResourceType and NamingAuthority. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to updated value in Version tag. ZCB"
            },
            {
              "ReleaseDate": "2025-12-04T13:31:02Z",
              "Note": "Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB"
            }
          ]
        },
        "Description": "The Low-Frequency Waveform Receiver (LFWR) is designed to provide an extension of the High Frequency Waveform Receiver into the frequency range below 25 Hz. The LFWR consists of six parallel low-pass filters connected to the three orthogonal electric field sensors and to the triaxial search coils. The input signals are band limited to a frequency range from 0.1 to 25 Hz and are sam- pled by a 12-bit analog-to-digital converter. The six LFWR channels are sampled simultaneously at a rate of 100 samples s-1. The dynamic range of the LFWRis approximately 72 dB with fixed gain. An FFT on 256 or 464 values, depending on the snapshot size, was used in calibrating the data; i.e., perform FFT, calibrate andin frequency domain, perform inverse FFT to get calibrated time series. Coordinate System Used: 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. The three orthogonal magnetic field components are given in units of nT/Sec rather than nT because the response of the searchcoils across the passband is not flat. In order to obtain units of nT, the data would need to be digitally filtered to the frequency of interest and then integrated over time. Integrating over the entire passband could possibly destroy the resolution of the higher frequency components since the low frequency noise, if present, will dominate. Data are bandpass filtered. The valid range of data in the frequency domain is from 0.5 to 22.5 Hz. Reference:..Gurnett, D.A. et al, The Polar plasma wave instrument, Space Science Reviews, Vol. 71, pp. 597-622, 1995.",
        "Acknowledgement": "Users please acknowledge the Coordinated Data Analysis Web (CDAWeb) at the NASA Goddard Space Flight Center and Polar PWI instrument Principal Investigator Don Gurnett of The University of Iowa.",
        "PublicationInfo": {
          "Authors": "Gurnett, Donald, A.; Menietti, J., Douglas",
          "PublicationDate": "2023-01-01T00:00:00",
          "PublishedBy": "Space Physics Data Facility"
        },
        "Contact": [
          {
            "PersonID": "spase://SMWG/Person/Donald.A.Gurnett",
            "Role": "PrincipalInvestigator"
          },
          {
            "PersonID": "spase://SMWG/Person/J.Douglas.Menietti",
            "Role": "GeneralContact"
          },
          {
            "PersonID": "spase://SMWG/Person/Lee.Frost.Bargatze",
            "Role": "MetadataContact"
          }
        ],
        "InformationURL": {
          "Name": "Polar Plasma Wave Investigation (PWI) Data and User's Guides",
          "URL": "http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/data.html",
          "Description": "A Polar PWI page is maintained at the University of Iowa with descriptions of interpretation issues, user's guides, data availability tables, a form for creating summary plots and access to pregenerated dynamic spectrograms.",
          "Language": "en"
        },
        "PriorID": [
          "spase://VWO/NumericalData/POLAR/PWI/Polar_PWI_LFWR_PT0.01S",
          "spase://VWO/NumericalData/POLAR/PWI/LFWR.PT0.01S",
          "spase://VSPO/NumericalData/POLAR/PWI/LFWR/PT0.01S"
        ]
      },
      "AccessInformation": [
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb",
          "Availability": "Online",
          "AccessRights": "Open",
          "RightsList": {
            "Rights": {
              "SchemeURI": "https://spdx.org/licenses/",
              "RightsIdentifierScheme": "SPDX",
              "RightsIdentifier": "CC0-1.0",
              "RightsURI": "https://spdx.org/licenses/CC0-1.0.html",
              "RightsName": "Creative Commons Zero v1.0 Universal",
              "Note": "CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products"
            }
          },
          "AccessURL": [
            {
              "Name": "FTPS from SPDF (not with most browsers)",
              "URL": "ftps://spdf.gsfc.nasa.gov/pub/data/polar/pwi/pwi_h2/",
              "Description": "FTP access to repository of Polar PWI MCA CDFs at NASA CDAWeb. Name of the data resource: PO_H2_PWI",
              "Language": "en"
            },
            {
              "Name": "HTTPS from SPDF",
              "URL": "https://spdf.gsfc.nasa.gov/pub/data/polar/pwi/pwi_h2/",
              "Description": "In CDF via HTTP from SPDF"
            }
          ],
          "Format": "CDF",
          "Acknowledgement": "Users please acknowledge Coordinated Data Analysis Web (CDAWeb) at the NASA Goddard Space Flight Center and Polar PWI instrument Principal Investigator Don Gurnett."
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb",
          "Availability": "Online",
          "AccessRights": "Open",
          "RightsList": {
            "Rights": {
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              "RightsIdentifier": "CC0-1.0",
              "RightsURI": "https://spdx.org/licenses/CC0-1.0.html",
              "RightsName": "Creative Commons Zero v1.0 Universal",
              "Note": "CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products"
            }
          },
          "AccessURL": {
            "Name": "CDAWeb",
            "URL": "https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=PO_H2_PWI&index=sp_phys",
            "ProductKey": "PO_H2_PWI",
            "Description": "Repository of Polar PWI data with subset, plot, and list functionalities from NASA CDAWeb, accessible via web interface. Name of the data resource: PO_H2_PWI.",
            "Language": "en"
          },
          "Format": "Text",
          "Encoding": "None",
          "Acknowledgement": "Users please acknowledge Coordinated Data Analysis Web (CDAWeb) at the NASA Goddard Space Flight Center and Polar PWI instrument Principal Investigator Don Gurnett."
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb",
          "Availability": "Online",
          "AccessRights": "Open",
          "RightsList": {
            "Rights": {
              "SchemeURI": "https://spdx.org/licenses/",
              "RightsIdentifierScheme": "SPDX",
              "RightsIdentifier": "CC0-1.0",
              "RightsURI": "https://spdx.org/licenses/CC0-1.0.html",
              "RightsName": "Creative Commons Zero v1.0 Universal",
              "Note": "CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products"
            }
          },
          "AccessURL": {
            "Name": "CDAWeb HAPI Server",
            "URL": "https://cdaweb.gsfc.nasa.gov/hapi",
            "Style": "HAPI",
            "ProductKey": "PO_H2_PWI",
            "Description": "Web Service to this product using the HAPI interface."
          },
          "Format": "CSV",
          "Acknowledgement": "Users please acknowledge Coordinated Data Analysis Web (CDAWeb) at the NASA Goddard Space Flight Center and Polar PWI instrument Principal Investigator Don Gurnett."
        }
      ],
      "InstrumentID": "spase://SMWG/Instrument/POLAR/PWI",
      "MeasurementType": [
        "Waves.Passive",
        "Spectrum"
      ],
      "TemporalDescription": {
        "TimeSpan": {
          "StartDate": "1996-03-25T00:00:16.000",
          "StopDate": "1997-09-16T16:52:55.000"
        },
        "Cadence": "PT0.01S"
      },
      "SpectralRange": "RadioFrequency",
      "ObservedRegion": [
        "Earth.Magnetosphere",
        "Earth.NearSurface.Plasmasphere",
        "Earth.NearSurface.AuroralRegion",
        "Earth.NearSurface.PolarCap",
        "Heliosphere.Inner"
      ],
      "Caveats": "See the Polar Interpretation Issues web site at http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/interpretation.html",
      "Keyword": [
        "Dynamic Spectrogram",
        "Spectrogram",
        "AKR",
        "Auroral hiss",
        "Auroral Kilometric Radiation",
        "Banded emissions",
        "Broadband Electrostatic Noise",
        "BEN",
        "Chorus",
        "Continuum radiation",
        "Electromagnetic Ion Cyclotron waves",
        "EMIC",
        "Electron Cyclotron Harmonics",
        "Kilometric Continuum radiation",
        "Myriametric radiation",
        "Plasmaspheric Hiss",
        "Solar radio burst",
        "Terrestrial Kilometric Radiation",
        "TKR",
        "UHR",
        "Upper hybrid resonance",
        "Whistler mode",
        "Whistlers"
      ],
      "Parameter": [
        {
          "Name": "Time",
          "ParameterKey": "Epoch",
          "Description": "Time",
          "Cadence": "PT0.01S",
          "Units": "ms",
          "RenderingHints": {
            "AxisLabel": "Epoch"
          },
          "ValidMin": "27-Feb-1996 00:00:00.000",
          "ValidMax": "31-Dec-2020 00:00:00.000",
          "FillValue": "-1.0e+31",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Delta_T",
          "ParameterKey": "Delta_T",
          "Description": "Time, time between points",
          "Cadence": "PT0.01S",
          "Units": "s",
          "FillValue": "-1.0e+31",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "NUM_SNAP",
          "ParameterKey": "NUM_SNAP",
          "Description": "Number of snapshots in this file",
          "Cadence": "PT0.01S",
          "ValidMin": "0",
          "ValidMax": "4800",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "DATA_QUALITY",
          "ParameterKey": "DATA_QUALITY",
          "Description": "Data Quality 0 = OK, 1 = poor",
          "Cadence": "PT0.01S",
          "Units": "(0=OK,1=poor)",
          "ValidMin": "0",
          "ValidMax": "1",
          "FillValue": "-2147480064",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "LFWR Elec. Field Antenna Ex",
          "ParameterKey": "LFWR_Ex",
          "Description": "LFWR Elec. Field, Antenna Ex (perp and outward in Local-Field-Aligned/LFA coords)",
          "Caveats": "When FFT is applied, Filter Rolls off at 25 kHz",
          "Cadence": "PT0.01S",
          "Units": "mV/M",
          "RenderingHints": {
            "AxisLabel": "LFWR Ex-LFA",
            "ValueFormat": "E12.4"
          },
          "ValidMin": "-400.0",
          "ValidMax": "400.0",
          "FillValue": "-1.0e+31",
          "Wave": {
            "WaveType": "PlasmaWaves",
            "WaveQuantity": "ACElectricField",
            "FrequencyRange": {
              "SpectralRange": "RadioFrequency",
              "Low": "0.1",
              "High": "25",
              "Units": "Hz"
            }
          }
        },
        {
          "Name": "LFWR Elec. Field Antenna Ey",
          "ParameterKey": "LFWR_Ey",
          "Description": "LFWR Elec. Field, Antenna Ey (perp and eastward in Local-Field-Aligned/LFA coords)",
          "Caveats": "When FFT is applied, Filter Rolls off at 25 kHz",
          "Cadence": "PT0.01S",
          "Units": "mV/M",
          "RenderingHints": {
            "AxisLabel": "LFWR Ey-LFA",
            "ValueFormat": "E12.4"
          },
          "ValidMin": "-400.0",
          "ValidMax": "400.0",
          "FillValue": "-1.0e+31",
          "Wave": {
            "WaveType": "PlasmaWaves",
            "WaveQuantity": "ACElectricField",
            "FrequencyRange": {
              "SpectralRange": "RadioFrequency",
              "Low": "0.1",
              "High": "25",
              "Units": "Hz"
            }
          }
        },
        {
          "Name": "LFWR Elec. Field Antenna Ez",
          "ParameterKey": "LFWR_Ez",
          "Description": "LFWR Elec. Field, Antenna Ez (parallel in Local-Field-Aligned/LFA coords)",
          "Caveats": "When FFT is applied, Filter Rolls off at 25 kHz",
          "Cadence": "PT0.01S",
          "Units": "mV/M",
          "RenderingHints": {
            "AxisLabel": "LFWR Ez-LFA",
            "ValueFormat": "E12.4"
          },
          "ValidMin": "-400.0",
          "ValidMax": "400.0",
          "FillValue": "-1.0e+31",
          "Wave": {
            "WaveType": "PlasmaWaves",
            "WaveQuantity": "ACElectricField",
            "FrequencyRange": {
              "SpectralRange": "RadioFrequency",
              "Low": "0.1",
              "High": "25",
              "Units": "Hz"
            }
          }
        },
        {
          "Name": "LFWR Mag. Field Antenna Bx",
          "ParameterKey": "LFWR_Bx",
          "Description": "LFWR Mag. Field, Antenna Bx (perp and outward in Local-Field-Aligned/LFA coords)",
          "Caveats": "When FFT is applied, Filter Rolls off at 25 kHz",
          "Cadence": "PT0.01S",
          "Units": "nT/Sec",
          "RenderingHints": {
            "AxisLabel": "LFWR Bx-LFA",
            "ValueFormat": "E12.4"
          },
          "ValidMin": "-400.0",
          "ValidMax": "400.0",
          "FillValue": "-1.0e+31",
          "Wave": {
            "WaveType": "PlasmaWaves",
            "WaveQuantity": "ACMagneticField",
            "FrequencyRange": {
              "SpectralRange": "RadioFrequency",
              "Low": "0.1",
              "High": "25",
              "Units": "Hz"
            }
          }
        },
        {
          "Name": "LFWR Mag. Field Antenna By",
          "ParameterKey": "LFWR_By",
          "Description": "LFWR Mag. Field, Antenna By (perp and eastward in Local-Field-Aligned/LFA coords)",
          "Caveats": "When FFT is applied, Filter Rolls off at 25 kHz",
          "Cadence": "PT0.01S",
          "Units": "nT/Sec",
          "RenderingHints": {
            "AxisLabel": "LFWR By-LFA",
            "ValueFormat": "E12.4"
          },
          "ValidMin": "-400.0",
          "ValidMax": "400.0",
          "FillValue": "-1.0e+31",
          "Wave": {
            "WaveType": "PlasmaWaves",
            "WaveQuantity": "ACMagneticField",
            "FrequencyRange": {
              "SpectralRange": "RadioFrequency",
              "Low": "0.1",
              "High": "25",
              "Units": "Hz"
            }
          }
        },
        {
          "Name": "LFWR Mag. Field Antenna Bz",
          "ParameterKey": "LFWR_Bz",
          "Description": "LFWR Mag. Field, Antenna Bz (parallel in Local-Field-Aligned/LFA coords)",
          "Caveats": "When FFT is applied, Filter Rolls off at 25 kHz",
          "Cadence": "PT0.01S",
          "Units": "nT/Sec",
          "RenderingHints": {
            "AxisLabel": "LFWR Bz-LFA",
            "ValueFormat": "E12.4"
          },
          "ValidMin": "-400.0",
          "ValidMax": "400.0",
          "FillValue": "-1.0e+31",
          "Wave": {
            "WaveType": "PlasmaWaves",
            "WaveQuantity": "ACMagneticField",
            "FrequencyRange": {
              "SpectralRange": "RadioFrequency",
              "Low": "0.1",
              "High": "25",
              "Units": "Hz"
            }
          }
        },
        {
          "Name": "Time",
          "ParameterKey": "Epoch0",
          "Description": "Time, begin time of LFWR snapshot",
          "Cadence": "PT0.01S",
          "Units": "ms",
          "RenderingHints": {
            "AxisLabel": "Epoch"
          },
          "ValidMin": "27-Feb-1996 00:00:00.000",
          "ValidMax": "31-Dec-2020 00:00:00.000",
          "FillValue": "-1.0e+31",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "FFT_size",
          "ParameterKey": "FFT_size",
          "Description": "Size of FFT used in Calibration of snapshot beginning at Epoch0",
          "Cadence": "PT0.01S",
          "Support": {
            "SupportQuantity": "Other"
          }
        }
      ]
    }
  }
}