{
  "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/SESAME/KeyParameters/AIS/PT900S",
      "ResourceHeader": {
        "ResourceName": "SESAME Advanced Ionospheric Sounder, Key Parameters",
        "ReleaseDate": "2021-04-27T15:38:11Z",
        "Description": "This set of key parameters from the SESAME (Satellite Experiments Simultaneous with Antartic MEasurements) ground-based experiment contains ionospheric parameters that are derived from quarter-hourly ionograms. The three parameters include the lowest plasma frequency recorded and the highest plasma frequency recorded from the E-region (MHz), and the highest plasma frequency recorded from the F-region (MHz). Please see references: (1) Grubb, RN, The NOAA SEL HF Radar system (ionospheric sounder) NOAA Tech Memo ERL SEL-55, Space Environ Lab, Boulder, CO, 1979, (2) Jarvis,MJ and Dudeney ,JR Reduction of ambiguities in HF radar results through a revised receiving array and sounding pattern. Radio Sci 21, 151-158, 1986, and (3) Dudeney, J. R. et. al., Satellite Experiments Simultaneous with Antarctic Measurements (SESAME), Space Science Reviews, Volume 71, Issue 1-4, pp. 705-742, 1995. ",
        "Contact": {
          "PersonID": "spase://SMWG/Person/J.R.Dudeney",
          "Role": "GeneralContact"
        },
        "PriorID": [
          "spase://VSPO/NumericalData/P_SESAME_K0_AIS",
          "spase://VSPO/NumericalData/SESAME/KeyParameters/AIS/PT900S"
        ]
      },
      "AccessInformation": [
        {
          "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/sesame/ais/"
            },
            {
              "Name": "HTTPS from SPDF",
              "URL": "https://spdf.gsfc.nasa.gov/pub/data/sesame/ais/",
              "Description": "In CDF via HTTP from CDAWeb"
            }
          ],
          "Format": "CDF",
          "Acknowledgement": "Please acknowledge data provider, J.R. Dudeney at the British Antarctic Survey and SPDF when using these data."
        },
        {
          "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=SE_K0_AIS&index=sp_phys",
            "ProductKey": "SE_K0_AIS",
            "Description": "Plots, lists, and files from CDAWeb.  Name of the data resource:SE_K0_AIS"
          },
          "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": "SE_K0_AIS",
            "Description": "Web Service to this product using the HAPI interface."
          },
          "Format": "CSV"
        }
      ],
      "ProviderProcessingLevel": "Calibrated",
      "InstrumentID": "spase://SMWG/Instrument/SESAME/AIS",
      "MeasurementType": "ThermalPlasma",
      "TemporalDescription": {
        "TimeSpan": {
          "StartDate": "1992-09-01T00:00:00.000Z",
          "StopDate": "2001-10-17T23:59:59.000Z"
        },
        "Cadence": "PT900S"
      },
      "ObservedRegion": "Earth.NearSurface.Ionosphere"
    }
  }
}