{
  "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/ISIS2/SFS/AverageIonogram/Fairbanks/PT22S",
      "ResourceHeader": {
        "ResourceName": "ISIS-2 Topside Sounder Average Ionogram over Fairbanks, AK: ULA, Latitude 65, Longitude 212",
        "ReleaseDate": "2021-04-27T15:38:11Z",
        "Description": "These Ionograms were digitized from the original ISIS-2 7-Track Analog Telemetry Tapes using the Facilities of the former Data Evaluation Laboratory at the NASA/GSFC. This Data Restoration Project is headed by Dr. R.F. Benson (NASA/GSFC). Ionograms were digitized at the Rate of 40,000 16-bit samples/s. This Sample Rate is higher than the Nyquist Frequency of 30 kHz. The Sample Frequency of 40 kHz provides a Measurement every 25 µs corresponding to an Apparent Range Interval equal to 3.75 km from c*t/2, where c is the Speed of Light. Ionograms with this Sample Rate are designated as 'Full' Ionograms because they have the full 3.75 km Apparent-Range Resolution. The Ionograms used for most Analyses, and those available from CDAWeb, were produced by averaging every four Samples of the Sounder-Receiver Video Amplitude Output to yield an average Value every 100 µs corresponding to an Apparent-Range Resolution of 15 km. These Ionogram Files are referred to as 'Average' Files with Standard Resolution. Each Ionogram consists of a Fixed-Frequency Portion and a Swept-Frequency Portion. The Time Resolution between Ionograms is typically 14 or 22 s depending on the Frequency Sweep Range.",
        "Acknowledgement": "James H. Whitteker, Robert F. Benson, Dieter K. Bilitza. Please thank James H. Whitteker, Principal Investigator for the ISIS 1 Swept Frequency Sounder, SFS, Instrument and Robert F. Benson, Project Scientist for the Alouette/ISIS Data-Restoration",
        "Contact": [
          {
            "PersonID": "spase://SMWG/Person/James.H.Whitteker",
            "Role": "PrincipalInvestigator"
          },
          {
            "PersonID": "spase://SMWG/Person/Robert.F.Benson",
            "Role": "GeneralContact"
          },
          {
            "PersonID": "spase://SMWG/Person/Dieter.K.Bilitza",
            "Role": "GeneralContact"
          },
          {
            "PersonID": "spase://SMWG/Person/Leonard.N.Garcia",
            "Role": "MetadataContact"
          },
          {
            "PersonID": "spase://SMWG/Person/Robert.E.McGuire",
            "Role": "MetadataContact"
          },
          {
            "PersonID": "spase://SMWG/Person/Lee.Frost.Bargatze",
            "Role": "MetadataContact"
          }
        ],
        "InformationURL": [
          {
            "Name": "ISIS/Alouette Topside Sounder Data Restoration Project Site",
            "URL": "https://spdf.gsfc.nasa.gov/isis/isis-status.html",
            "Description": "ISIS/Alouette Page maintained by NASA GSFC with Science and Instrument Descriptions, Data Access, Software, and Publication Lists"
          },
          {
            "Name": "NSSDC Master Catalog",
            "URL": "https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1969-009A",
            "Description": "Information about the Swept Frequency Sounder, SFS, Experiment on Alouette 2"
          }
        ],
        "PriorID": "spase://VSPO/NumericalData/ISIS2/SFS/AverageIonogram/Fairbanks/PT22S"
      },
      "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/isis/topside_sounder/ionogram_cdf/isis2/ULA_65N_212E/",
              "Description": "Access to Data in CDF Format via ftp from SPDF"
            },
            {
              "Name": "HTTPS from SPDF",
              "URL": "https://spdf.gsfc.nasa.gov/pub/data/isis/topside_sounder/ionogram_cdf/isis2/ULA_65N_212E/",
              "Description": "Access to Data in CDF Format via http from SPDF"
            },
            {
              "Name": "CDAWeb",
              "URL": "https://cdaweb.gsfc.nasa.gov/index.html/",
              "ProductKey": "I2_AV_ULA",
              "Description": "Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb"
            }
          ],
          "Format": "CDF",
          "Encoding": "None",
          "Acknowledgement": "James H. Whitteker, Robert F. Benson, Dieter K. Bilitza. Please thank James H. Whitteker, Principal Investigator for the ISIS 1 Swept Frequency Sounder, SFS, Instrument and Robert F. Benson, Project Scientist for the Alouette/ISIS Data-Restoration. Please acknowledge the data providers and CDAWeb when using these data."
        },
        {
          "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": "I2_AV_ULA",
            "Description": "Web Service to this product using the HAPI interface."
          },
          "Format": "CSV",
          "Acknowledgement": "James H. Whitteker, Robert F. Benson, Dieter K. Bilitza. Please thank James H. Whitteker, Principal Investigator for the ISIS 1 Swept Frequency Sounder, SFS, Instrument and Robert F. Benson, Project Scientist for the Alouette/ISIS Data-Restoration. Please acknowledge the data providers and CDAWeb when using these data."
        }
      ],
      "ProcessingLevel": "Calibrated",
      "InstrumentID": "spase://SMWG/Instrument/ISIS2/SFS",
      "MeasurementType": [
        "Spectrum",
        "Waves.Active"
      ],
      "TemporalDescription": {
        "TimeSpan": {
          "StartDate": "1972-12-31T00:00:00",
          "StopDate": "1979-07-30T02:17:45",
          "Note": "The Cadence is 31 s between Ionograms. The Alouette 2 Ionograms have the slowest Sweep Rate of any of the Alouette/ISIS Topside Sounders sweeping from 0.12 to 14.5 MHz in about 28 s with a Frequency Sweep Rate of 0.13 MHz/s below 2.0 MHz, providing the highest Frequency Resolution of any of the ISIS Program Sounders. The Alouette 2 Frequency Sweep Rate above 2 MHz was 1 MHz/s. Alouette 2 did not have a Fixed Frequency Operation."
        },
        "Cadence": "PT22S"
      },
      "SpectralRange": "RadioFrequency",
      "ObservedRegion": [
        "Earth.Magnetosphere",
        "Earth.Magnetosphere.Polar",
        "Earth.NearSurface",
        "Earth.NearSurface.AuroralRegion",
        "Earth.NearSurface.EquatorialRegion",
        "Earth.NearSurface.Ionosphere",
        "Earth.NearSurface.PolarCap"
      ],
      "Keyword": [
        "Ionogram",
        "Topside Sounder",
        "Swept Frequency Sounder",
        "Topside Ionosphere",
        "Ionospheric Reflections",
        "Ground Reflections",
        "Ionospheric Echoes",
        "Ground Echoes",
        "Ducted Echoes",
        "Wave Scattering",
        "Field-Aligned Irregularities, FAI",
        "Plasma Resonance",
        "Plasma Waves",
        "Auroral Kilometric Radiation, AKR",
        "Solar Type III Bursts",
        "Upper Hybrid Noise Band"
      ],
      "Parameter": [
        {
          "Name": "Satellite ID",
          "ParameterKey": "satellite",
          "Description": "Satellite ID: 1=Alouette 1, 2=Alouette 2, 3=ISIS 1, 4=ISIS 2",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "s/c_ID",
            "ValueFormat": "I1",
            "ScaleMin": "1",
            "ScaleMax": "4"
          },
          "ValidMin": "1",
          "ValidMax": "4",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Telemetry Station Code",
          "ParameterKey": "station_id",
          "Description": "Two-Digit Telemetry Station Code",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "station",
            "ValueFormat": "I2",
            "ScaleMin": "1",
            "ScaleMax": "99"
          },
          "ValidMin": "1",
          "ValidMax": "99",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Transmitter Power Code",
          "ParameterKey": "power_code",
          "Description": "Transmitter Power Code: 1=Primary, 400 W, 2=Secondary, 400 W",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "T_power",
            "ValueFormat": "I1",
            "ScaleMin": "1",
            "ScaleMax": "2"
          },
          "ValidMin": "1",
          "ValidMax": "2",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "Sounder-Receiver Code",
          "ParameterKey": "s/r_code",
          "Description": "Sounder-Receiver Code: 0=Off, 1=On",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "s/r_code",
            "ValueFormat": "I1",
            "ScaleMin": "0",
            "ScaleMax": "1"
          },
          "ValidMin": "0",
          "ValidMax": "1",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "Swept Frequency Range Code",
          "ParameterKey": "f_range_code",
          "Description": "Swept Frequency Range Code: 0=Normal, 1=Extended",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "f_range",
            "ValueFormat": "I1",
            "ScaleMin": "0",
            "ScaleMax": "1"
          },
          "ValidMin": "0",
          "ValidMax": "1",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "DMODE Code",
          "ParameterKey": "DMODE",
          "Description": "DMODE, Transmission On/Off for Alternate Frame Pairs: 0=Off, 1=On",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "DMODE",
            "ValueFormat": "I1",
            "ScaleMin": "0",
            "ScaleMax": "1"
          },
          "ValidMin": "0",
          "ValidMax": "1",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "GMODE Code",
          "ParameterKey": "GMODE",
          "Description": "GMODE, Transmission of Alternate Frames of Fixed Frequency Ionograms and Normal Combined Fixed Frequency and Swept Frequency Ionograms: 0=Off, 1=On",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "GMODE",
            "ValueFormat": "I1",
            "ScaleMin": "0",
            "ScaleMax": "1"
          },
          "ValidMin": "0",
          "ValidMax": "1",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "Sounder Mixed Mode",
          "ParameterKey": "mixed_mode",
          "Description": "Sounder Mixed Mode, Transmission at a Fixed Frequency while the Sounder-Receiver sweeps over the Swept Frequency Range: 0=Off, 1=On",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "s_m_mode",
            "ValueFormat": "I1",
            "ScaleMin": "0",
            "ScaleMax": "1"
          },
          "ValidMin": "0",
          "ValidMax": "1",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "AIT Mode",
          "ParameterKey": "AIT_mode",
          "Description": "Automatic Ionogram Transmission, AIT, Mode, Automatic Sounder Operation every 3 min: 0=Off, 1=On",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "AIT",
            "ValueFormat": "I1",
            "ScaleMin": "0",
            "ScaleMax": "1"
          },
          "ValidMin": "0",
          "ValidMax": "1",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "Fixed Frequency Code",
          "ParameterKey": "fix_freq",
          "Description": "Fixed Frequency Code: 0=Off, 1=0.12 MHz, 2=0.48 MHz, 3=1.00 MHz, 4=1.95 MHz, 5=4.00 MHz, 6=9.303 MHz",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "f_code",
            "ValueFormat": "I1",
            "ScaleMin": "0",
            "ScaleMax": "6"
          },
          "ValidMin": "0",
          "ValidMax": "6",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "Year",
          "ParameterKey": "year",
          "Description": "Year of Ionogram Frame Sync",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "year",
            "ValueFormat": "I2",
            "ScaleMin": "62",
            "ScaleMax": "83"
          },
          "ValidMin": "62",
          "ValidMax": "84",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Day of Year",
          "ParameterKey": "doy",
          "Description": "Day of Year of Ionogram Frame Sync",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "DOY",
            "ValueFormat": "I3",
            "ScaleMin": "1",
            "ScaleMax": "366"
          },
          "ValidMin": "1",
          "ValidMax": "366",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Hour of Day",
          "ParameterKey": "hr",
          "Description": "Hour of Day of Ionogram Frame Sync, UT",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "Hour",
            "ValueFormat": "I2",
            "ScaleMin": "0",
            "ScaleMax": "24"
          },
          "ValidMin": "0",
          "ValidMax": "24",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Minute of Hour",
          "ParameterKey": "min",
          "Description": "Minute of Hour of Ionogram Frame Sync, UT",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "min",
            "ValueFormat": "I2",
            "ScaleMin": "0",
            "ScaleMax": "60"
          },
          "ValidMin": "0",
          "ValidMax": "60",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Second of Minute",
          "ParameterKey": "sec",
          "Description": "Second of Minute of Ionogram Frame Sync, UT",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "second",
            "ValueFormat": "F7.4",
            "ScaleMin": "0.0",
            "ScaleMax": "60.0"
          },
          "ValidMin": "0.0",
          "ValidMax": "60.0",
          "FillValue": "-1.0e+31",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Local Mean Time",
          "ParameterKey": "LMT",
          "Description": "Local Mean Time, LMT, at the Time of Ionogram Frame Sync, Format: HH,MM",
          "Cadence": "PT22S",
          "RenderingHints": {
            "ValueFormat": "I2"
          },
          "Structure": {
            "Size": "2",
            "Element": [
              {
                "Name": "Element 1",
                "Index": "1",
                "Units": "h",
                "UnitsConversion": "60>s",
                "ValidMin": "0",
                "ValidMax": "24",
                "RenderingHints": {
                  "AxisLabel": "LMT(hh)",
                  "ScaleMin": "0",
                  "ScaleMax": "24"
                }
              },
              {
                "Name": "Element 2",
                "Index": "2",
                "Units": "min",
                "UnitsConversion": "3600>s",
                "ValidMin": "0",
                "ValidMax": "60",
                "RenderingHints": {
                  "AxisLabel": "LMT(mm)",
                  "ScaleMin": "0",
                  "ScaleMax": "60"
                }
              }
            ]
          },
          "FillValue": "-2147483648",
          "Support": {
            "Qualifier": "DirectionAngle.AzimuthAngle",
            "SupportQuantity": "Positional"
          }
        },
        {
          "Name": "Geographic Coordinates",
          "ParameterKey": "geo_coord",
          "Description": "Geographic Coordinates, GEO, Latitude, Longitude, Height, at the Time of Ionogram Frame Sync",
          "Cadence": "PT22S",
          "CoordinateSystem": {
            "CoordinateRepresentation": "Spherical",
            "CoordinateSystemName": "GEO"
          },
          "RenderingHints": {
            "ValueFormat": "F7.2"
          },
          "Structure": {
            "Size": "3",
            "Element": [
              {
                "Name": "Element 1",
                "Index": "1",
                "Units": "°",
                "UnitsConversion": "0.0174532925>rad",
                "ValidMin": "-90.0",
                "ValidMax": "90.0",
                "RenderingHints": {
                  "AxisLabel": "latitude",
                  "ScaleMin": "-90.0",
                  "ScaleMax": "90.0"
                }
              },
              {
                "Name": "Element 2",
                "Index": "2",
                "Units": "°",
                "UnitsConversion": "0.0174532925>rad",
                "ValidMin": "0.0",
                "ValidMax": "360.0",
                "RenderingHints": {
                  "AxisLabel": "longitude",
                  "ScaleMin": "0.0",
                  "ScaleMax": "360.0"
                }
              },
              {
                "Name": "Element 3",
                "Index": "3",
                "Units": "km",
                "UnitsConversion": "1e3>m",
                "ValidMin": "0.0",
                "ValidMax": "10000.0",
                "RenderingHints": {
                  "AxisLabel": "height",
                  "ScaleMin": "0.0",
                  "ScaleMax": "10000.0"
                }
              }
            ]
          },
          "FillValue": "-1.0e+31",
          "Support": {
            "Qualifier": "Vector",
            "SupportQuantity": "Positional"
          }
        },
        {
          "Name": "Geomagnetic Local Time",
          "ParameterKey": "GMLMT",
          "Description": "Geomagnetic Local Time, GMLMT, Format: HH,MM, at the Time of Ionogram Frame Sync",
          "Cadence": "PT22S",
          "CoordinateSystem": {
            "CoordinateRepresentation": "Spherical",
            "CoordinateSystemName": "LGM"
          },
          "RenderingHints": {
            "ValueFormat": "I2"
          },
          "Structure": {
            "Size": "2",
            "Element": [
              {
                "Name": "Element 1",
                "Index": "1",
                "Units": "h",
                "UnitsConversion": "60>s",
                "ValidMin": "0",
                "ValidMax": "24",
                "RenderingHints": {
                  "AxisLabel": "GMLMT(hh)",
                  "ScaleMin": "0",
                  "ScaleMax": "24"
                }
              },
              {
                "Name": "Element 2",
                "Index": "2",
                "Units": "min",
                "UnitsConversion": "3600>s",
                "ValidMin": "0",
                "ValidMax": "60",
                "RenderingHints": {
                  "AxisLabel": "GMLMT(mm)",
                  "ScaleMin": "0",
                  "ScaleMax": "60"
                }
              }
            ]
          },
          "FillValue": "-2147483648",
          "Support": {
            "Qualifier": "DirectionAngle.AzimuthAngle",
            "SupportQuantity": "Positional"
          }
        },
        {
          "Name": "Geomagnetic Latitude",
          "ParameterKey": "GMLAT",
          "Description": "Geomagnetic Latitude, MAG, at the Time of Ionogram Frame Sync",
          "Cadence": "PT22S",
          "Units": "°",
          "UnitsConversion": "0.0174532925>rad",
          "CoordinateSystem": {
            "CoordinateRepresentation": "Spherical",
            "CoordinateSystemName": "MAG"
          },
          "RenderingHints": {
            "AxisLabel": "geom_lat",
            "ValueFormat": "F7.2",
            "ScaleMin": "-90.0",
            "ScaleMax": "90.0"
          },
          "ValidMin": "-90.0",
          "ValidMax": "90.0",
          "FillValue": "-1.0e+31",
          "Support": {
            "Qualifier": "DirectionAngle.ElevationAngle",
            "SupportQuantity": "Positional"
          }
        },
        {
          "Name": "Geomagnetic Longitude",
          "ParameterKey": "GMLONG",
          "Description": "Geomagnetic Longitude, MAG, at the Time of Ionogram Frame Sync",
          "Cadence": "PT22S",
          "Units": "°",
          "UnitsConversion": "0.0174532925>rad",
          "CoordinateSystem": {
            "CoordinateRepresentation": "Spherical",
            "CoordinateSystemName": "MAG"
          },
          "RenderingHints": {
            "AxisLabel": "geom_long",
            "ValueFormat": "F7.2",
            "ScaleMin": "-180.0",
            "ScaleMax": "180.0"
          },
          "ValidMin": "-180.0",
          "ValidMax": "360.0",
          "FillValue": "-1.0e+31",
          "Support": {
            "Qualifier": "DirectionAngle.AzimuthAngle",
            "SupportQuantity": "Positional"
          }
        },
        {
          "Name": "Electron Local Gyrofrequency",
          "ParameterKey": "FH",
          "Description": "Electron Local Gyrofrequency, at the Time of Ionogram Frame Sync",
          "Cadence": "PT22S",
          "Units": "rad/s",
          "RenderingHints": {
            "AxisLabel": "Electron Gyrofrequency",
            "ValueFormat": "F7.3",
            "ScaleMin": "0.0",
            "ScaleMax": "100.0"
          },
          "ValidMin": "0.0",
          "ValidMax": "100.0",
          "FillValue": "-1.0e+31",
          "Particle": {
            "ParticleType": "Electron",
            "ParticleQuantity": "Gyrofrequency"
          }
        },
        {
          "Name": "Invariant Latitude",
          "ParameterKey": "INV_LAT",
          "Description": "Invariant Latitude, at the Time of Ionogram Frame Sync",
          "Cadence": "PT22S",
          "Units": "°",
          "UnitsConversion": "0.0174532925>rad",
          "RenderingHints": {
            "AxisLabel": "inv_lat",
            "ValueFormat": "F7.2",
            "ScaleMin": "-90.0",
            "ScaleMax": "90.0"
          },
          "ValidMin": "-90.0",
          "ValidMax": "90.0",
          "FillValue": "-1.0e+31",
          "Support": {
            "Qualifier": "DirectionAngle.ElevationAngle",
            "SupportQuantity": "Positional"
          }
        },
        {
          "Name": "Magnetic Inclination",
          "ParameterKey": "DIP",
          "Description": "Magnetic Inclination, Dip Angle of Magnetic Field Direction, at the Time of Ionogram Frame Sync",
          "Cadence": "PT22S",
          "Units": "°",
          "UnitsConversion": "0.0174532925>rad",
          "CoordinateSystem": {
            "CoordinateRepresentation": "Spherical",
            "CoordinateSystemName": "LGM"
          },
          "RenderingHints": {
            "AxisLabel": "DIP",
            "ValueFormat": "I3",
            "ScaleMin": "-90",
            "ScaleMax": "90"
          },
          "ValidMin": "-90",
          "ValidMax": "90",
          "FillValue": "-2147483648",
          "Field": {
            "Qualifier": "DirectionAngle.ElevationAngle",
            "FieldQuantity": "Magnetic"
          }
        },
        {
          "Name": "Solar Zenith Angle",
          "ParameterKey": "CHI",
          "Description": "Solar Zenith Angle, SZA, at the Time of Ionogram Frame Sync",
          "Cadence": "PT22S",
          "Units": "°",
          "UnitsConversion": "0.0174532925>rad",
          "RenderingHints": {
            "AxisLabel": "CHI",
            "ValueFormat": "F7.2",
            "ScaleMin": "0",
            "ScaleMax": "180"
          },
          "ValidMin": "0",
          "ValidMax": "180",
          "FillValue": "-2147483648",
          "Support": {
            "Qualifier": "DirectionAngle.PolarAngle",
            "SupportQuantity": "Positional"
          }
        },
        {
          "Name": "L Shell",
          "ParameterKey": "L",
          "Description": "L Shell, McIlwain Parameter, at the Time of Ionogram Frame Sync",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "L",
            "ValueFormat": "F7.2",
            "ScaleMin": "0.0",
            "ScaleMax": "180.0"
          },
          "ValidMin": "0.0",
          "ValidMax": "180.0",
          "FillValue": "-1.0e+31",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Spacecraft Sunlight",
          "ParameterKey": "sun",
          "Description": "Spacecraft Sunlight: 0=Out, 1=In, at the Time of Ionogram Frame Sync",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "sun",
            "ValueFormat": "I1",
            "ScaleMin": "1",
            "ScaleMax": "2"
          },
          "ValidMin": "1",
          "ValidMax": "2",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "CEP, Instrument Status",
          "ParameterKey": "CEP",
          "Description": "Cylindrical Electrostatic Probe, CEP, Instrument Status: 0=Off, 1=On",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "CEP",
            "ValueFormat": "I1",
            "ScaleMin": "0",
            "ScaleMax": "1"
          },
          "ValidMin": "0",
          "ValidMax": "1",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "VLF, Instrument Status",
          "ParameterKey": "VLF",
          "Description": "Very Low Frequency, VLF, 0.05 to 30 kHz Receiver, Instrument Status: 0=Off, 1=On",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "VLF",
            "ValueFormat": "I1",
            "ScaleMin": "0",
            "ScaleMax": "1"
          },
          "ValidMin": "0",
          "ValidMax": "1",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "RPA, Instrument Status",
          "ParameterKey": "RPA",
          "Description": "Retarding Potential Analyzer, RPA, Instrument Status: 0=Off, 1=On",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "RPA",
            "ValueFormat": "I1",
            "ScaleMin": "0",
            "ScaleMax": "1"
          },
          "ValidMin": "0",
          "ValidMax": "1",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "IMS, Instrument Status",
          "ParameterKey": "IMS",
          "Description": "Ion Mass Spectrometer, IMS, Instrument Status: 0=Off, 1=On",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "IMS",
            "ValueFormat": "I1",
            "ScaleMin": "0",
            "ScaleMax": "1"
          },
          "ValidMin": "0",
          "ValidMax": "1",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "SPS, Instrument Status",
          "ParameterKey": "SPS",
          "Description": "Soft Particle Spectrometer, SPS, Instrument Status: 0=Off, 1=On",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "SPS",
            "ValueFormat": "I1",
            "ScaleMin": "0",
            "ScaleMax": "1"
          },
          "ValidMin": "0",
          "ValidMax": "1",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "EPD, Instrument Status",
          "ParameterKey": "EPD",
          "Description": "Energetic Particle Detector, EPD, Instrument Status: 0=Off, 1=On",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "EPD",
            "ValueFormat": "I1",
            "ScaleMin": "0",
            "ScaleMax": "1"
          },
          "ValidMin": "0",
          "ValidMax": "1",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "RLP, Instrument Status",
          "ParameterKey": "RLP",
          "Description": "Red Line Photometer, RLP, Instrument Status: 0=Off, 1=On",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "RLP",
            "ValueFormat": "I1",
            "ScaleMin": "0",
            "ScaleMax": "1"
          },
          "ValidMin": "0",
          "ValidMax": "1",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "ASP, Instrument Status",
          "ParameterKey": "ASP",
          "Description": "Auroral Scanning Photometer, ASP, Instrument Status: 0=Off, 1=On",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "ASP",
            "ValueFormat": "I1",
            "ScaleMin": "0",
            "ScaleMax": "1"
          },
          "ValidMin": "0",
          "ValidMax": "1",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "Start of Swept Frequency Portion",
          "ParameterKey": "swept_start",
          "Description": "Scan Line Number of the Start of Swept Frequency Portion of the Ionogram, this seperates the Fixed Frequency and Swept Frequency Portions of the Ionogram",
          "Caveats": "seperates the fixed and swept portions",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "swept_start",
            "ValueFormat": "I5",
            "ScaleMin": "0",
            "ScaleMax": "10000"
          },
          "ValidMin": "0",
          "ValidMax": "10000",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Times of Ionogram Frequency Markers",
          "ParameterKey": "Time_mark",
          "Description": "Times of Ionogram Frequency Markers, Milliseconds after Frame Sync",
          "Caveats": "time of frequency markers This parameter exhibits an increasing monotonic progression.",
          "Cadence": "PT22S",
          "Units": "ms",
          "UnitsConversion": "1e-3>s",
          "RenderingHints": {
            "ValueFormat": "F10.3",
            "ScaleMin": "3000.0",
            "ScaleMax": "30000.0"
          },
          "Structure": {
            "Size": "22",
            "Element": [
              {
                "Name": "Element 1",
                "Index": "1"
              },
              {
                "Name": "Element 2",
                "Index": "2"
              },
              {
                "Name": "Element 3",
                "Index": "3"
              },
              {
                "Name": "Element 4",
                "Index": "4"
              },
              {
                "Name": "Element 5",
                "Index": "5"
              },
              {
                "Name": "Element 6",
                "Index": "6"
              },
              {
                "Name": "Element 7",
                "Index": "7"
              },
              {
                "Name": "Element 8",
                "Index": "8"
              },
              {
                "Name": "Element 9",
                "Index": "9"
              },
              {
                "Name": "Element 10",
                "Index": "10"
              },
              {
                "Name": "Element 11",
                "Index": "11"
              },
              {
                "Name": "Element 12",
                "Index": "12"
              },
              {
                "Name": "Element 13",
                "Index": "13"
              },
              {
                "Name": "Element 14",
                "Index": "14"
              },
              {
                "Name": "Element 15",
                "Index": "15"
              },
              {
                "Name": "Element 16",
                "Index": "16"
              },
              {
                "Name": "Element 17",
                "Index": "17"
              },
              {
                "Name": "Element 18",
                "Index": "18"
              },
              {
                "Name": "Element 19",
                "Index": "19"
              },
              {
                "Name": "Element 20",
                "Index": "20"
              },
              {
                "Name": "Element 21",
                "Index": "21"
              },
              {
                "Name": "Element 22",
                "Index": "22"
              }
            ]
          },
          "ValidMin": "3000.0",
          "ValidMax": "30000.0",
          "FillValue": "-1.0e+31",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Values of Ionogram Frequency Markers",
          "ParameterKey": "freq_mark",
          "Description": "Ionogram Frequency Marker Valuess",
          "Cadence": "PT22S",
          "Units": "MHz",
          "UnitsConversion": "1e6>Hz",
          "RenderingHints": {
            "ValueFormat": "E11.2",
            "ScaleMin": "0.1",
            "ScaleMax": "20.0"
          },
          "Structure": {
            "Size": "22",
            "Element": [
              {
                "Name": "Element 1",
                "Index": "1"
              },
              {
                "Name": "Element 2",
                "Index": "2"
              },
              {
                "Name": "Element 3",
                "Index": "3"
              },
              {
                "Name": "Element 4",
                "Index": "4"
              },
              {
                "Name": "Element 5",
                "Index": "5"
              },
              {
                "Name": "Element 6",
                "Index": "6"
              },
              {
                "Name": "Element 7",
                "Index": "7"
              },
              {
                "Name": "Element 8",
                "Index": "8"
              },
              {
                "Name": "Element 9",
                "Index": "9"
              },
              {
                "Name": "Element 10",
                "Index": "10"
              },
              {
                "Name": "Element 11",
                "Index": "11"
              },
              {
                "Name": "Element 12",
                "Index": "12"
              },
              {
                "Name": "Element 13",
                "Index": "13"
              },
              {
                "Name": "Element 14",
                "Index": "14"
              },
              {
                "Name": "Element 15",
                "Index": "15"
              },
              {
                "Name": "Element 16",
                "Index": "16"
              },
              {
                "Name": "Element 17",
                "Index": "17"
              },
              {
                "Name": "Element 18",
                "Index": "18"
              },
              {
                "Name": "Element 19",
                "Index": "19"
              },
              {
                "Name": "Element 20",
                "Index": "20"
              },
              {
                "Name": "Element 21",
                "Index": "21"
              },
              {
                "Name": "Element 22",
                "Index": "22"
              }
            ]
          },
          "ValidMin": "0.0",
          "ValidMax": "25.0",
          "FillValue": "-1.0e+31",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Number of Delay Times per Ionogram Scan Line",
          "ParameterKey": "vh_num",
          "Description": "Number of Delay Times per Ionogram Scan Line. Each Sounder Pulse Transmission is followed by a Scan of the Sounder-Receiver Video Amplitude Output Values for each Delay Time monitored after the transmitted Pulse. These Scans are called Scan Lines. There are two Types of ISIS 1 Binary Ionogram Files, one designated as Full and the other designated as Average. The Full File has 1340 Delay Times, one every 0.025 ms. The Average Files are derived from the Full Files by averaging the Amplitude Values in four Delay Time Bins. Thus, the Average Binary Files contain 335 Time Delay Bins within each Scan Line. The CDF Files were made from these Average Binary Files.",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "N_vh",
            "ValueFormat": "I3",
            "ScaleMin": "0",
            "ScaleMax": "223"
          },
          "ValidMin": "0",
          "ValidMax": "230",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Number of Ionogram Scan Line Frequencies",
          "ParameterKey": "f_num",
          "Description": "Number of Ionogram Scan Line Frequencie Steps. Ionogram Files can be of different Lengths. In some the Swept Frequency Portion covers the Range from 0.1 Mhz to 10 MHz, in others from 0.1 Mhz to 20 MHz. Also, the proper Start of each Ionogram File, marked by a Frame Sync Pulse, was not always detected during the Analog to Digital, A/D, Conversion. In such cases, a Frame Sync was inserted to limit the File Size. Thus the Number of Sounder-Receiver Video Amplitude versus Delay Time Scan Lines per Ionogram can vary.",
          "Cadence": "PT22S",
          "RenderingHints": {
            "AxisLabel": "N_f",
            "ValueFormat": "I6",
            "ScaleMin": "0",
            "ScaleMax": "4000"
          },
          "ValidMin": "0",
          "ValidMax": "4000",
          "FillValue": "-2147483648",
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Delay Time Values",
          "ParameterKey": "delay_time",
          "Description": "Delay Time Values used in each Scan Line",
          "Cadence": "PT22S",
          "Units": "ms",
          "UnitsConversion": "1e-3>s",
          "RenderingHints": {
            "ValueFormat": "F9.2",
            "ScaleType": "LinearScale"
          },
          "Structure": {
            "Size": "223"
          },
          "FillValue": "-1.0e+31",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Apparent Range Values",
          "ParameterKey": "v_height",
          "Description": "Virtual Height Values corresponding to Delay Times used in each Scan Line",
          "Cadence": "PT22S",
          "Units": "km",
          "UnitsConversion": "1e3>m",
          "RenderingHints": {
            "ValueFormat": "F9.2",
            "ScaleType": "LinearScale"
          },
          "Structure": {
            "Size": "223"
          },
          "FillValue": "-1.0e+31",
          "Support": {
            "Qualifier": "Magnitude",
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Epoch Time",
          "ParameterKey": "Epoch",
          "Description": "Epoch Time",
          "Caveats": "This parameter exhibits an increasing monotonic progression.",
          "Cadence": "PT22S",
          "Units": "ms",
          "UnitsConversion": "1e-3>s",
          "RenderingHints": {
            "AxisLabel": "Epoch",
            "ScaleMin": "6.2135661819904e+13",
            "ScaleMax": "6.3113882619904e+13"
          },
          "ValidMin": "01-Jan-1969 00:00:00.000",
          "ValidMax": "01-Jan-2000 00:00:00.000",
          "FillValue": "-1.0e+31",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Sounder Amplitude",
          "Set": "Time series defined by using: EPOCH",
          "ParameterKey": "ampl",
          "Description": "Sounder Amplitude at 223 Virtual Heights for Fixed Frequency and Swept Frequency, Ionogram. The Sounder-Receiver Linear Video Amplitude, from 0 to 255 Telemetry Units, in each Apparent Range Bin of each Scan Line covering the Fixed Frequency and Swept Frequency Regions. This Range corresponds to a Linear Sounder-Receiver Video Amplitude Output Range from 0 V to 4.5 V. This Calibration is based on the Video Calibration Pulse, of 3.0 V or 170 Telemetry Units, at the End of the Line Scan following each Sounder Pulse. The Combined Calibration Pulses from all of the Line Scans produces a Colored Stripe at the Bottom of the Digital Ionograms. In order to derive an Input Power Level corresponding to the Receiver Video Output, it is necessary to know the Sounder-Receiver Automatic Gain Control, AGC, Voltage. This Voltage was obtained from the Pulse Code Modulation, PCM, Data and thus is only available if PCM Data were available. The AGC Voltage, which ranges from 0 V to 5.12 V, is obtained from a Linear Interpolation between the AGC Trace displayed between the 4005 km Apparent Range, at 26.7 ms Delay Time, as 5.12 V and the 4395 km, at 29.3 ms Delay Time, as 0 V. On the Full Ionograms these Numbers are 4001.250 km or 26.675 ms and 4398.750 km or 29.325 ms. On the Average Ionograms, which are available as either CDF or Binary Files from the SPDF or the NSSDC, the Range Resolution is 0.1 ms, corresponding to a Virtual Range Resolution of 15 km. There are 27 Rows an thus 26 Intervals covering the 0 V to 5.12 V Range; thus each Row in Virtual Range above, i.e. decreasing Delay Time, the Zero Level at 29.3 ms Delay Time corresponds to an Increase of 5.12/26 V of AGC with a Quantization Uncertainty of approximately Plus or Minus 0.1 V. Two Rows have Zero Video Output Amplitude Values on the Average Ionograms in order that a clear AGC Trace is visible on the Ionograms. The Row with the greatest Virtual Range corresponds to the actual AGC Value. On the Full Ionograms, which are only available as Binary Files from the NSSDC, the Range Resolution is 0.025 ms, corresponding to a Virtual Range Resolution of 3.75 km, and three Rows have Zero Video Output Amplitude Values; the middle Row corresponds to the actual AGC Value.",
          "Cadence": "PT22S",
          "RenderingHints": {
            "ValueFormat": "I3"
          },
          "Structure": {
            "Size": "223"
          },
          "FillValue": "-128",
          "Wave": {
            "WaveType": "PlasmaWaves",
            "Qualifier": [
              "Magnitude",
              "Pseudo"
            ],
            "WaveQuantity": "Intensity"
          }
        },
        {
          "Name": "Interpolated Frequencies",
          "Set": "Time series defined by using: EPOCH",
          "ParameterKey": "freq",
          "Description": "Interpolated Fixed and Swept Frequencies for each Scan Line, in the Swept Frequency Portion of the Ionogram they correspond to interpolated Values between the Frequency Markers",
          "Caveats": "This variable could be used as x-axis on amplitude spectrograms if fixed part is subtracted.",
          "Cadence": "PT22S",
          "Units": "MHz",
          "UnitsConversion": "1e6>Hz",
          "RenderingHints": {
            "DisplayType": "TimeSeries",
            "AxisLabel": "Frequency",
            "ValueFormat": "E11.2",
            "ScaleMin": "0.1",
            "ScaleMax": "25.0"
          },
          "ValidMin": "0.1",
          "ValidMax": "25.0",
          "FillValue": "-1.0e+31",
          "Wave": {
            "WaveType": "PlasmaWaves",
            "Qualifier": "Scalar",
            "WaveQuantity": "Frequency"
          }
        }
      ]
    }
  }
}