{
  "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/MMS/2/ASPOC/Survey/Level2/PT1S",
      "ResourceHeader": {
        "ResourceName": "MMS 2 Active Spacecraft Potential Control, Sensors 1 and 2 (ASPOC) Level 2, Quick-Look Survey",
        "ReleaseDate": "2021-04-27T15:38:11Z",
        "Description": "MMS 2 Active Spacecraft Potential Control (ASPOC) - Sensors 1 and 2 Ion Beam Current Rates, Beam Energies, and Instrument Status variables. In tenuous plasma regions, the floating potential of a sunlit spacecraft is positively charged, reaching up to tens of Volts. The corresponding electric field disturbs the ambient plasma measurements obtained from electron and ion sensors and the large fluxes of attracted photo-electrons can significantly reduce the lifetime of the micro-channel plate. The electric field measurements can be also contaminated by the high spacecraft potential values. The Active Spacecraft Potential Control neutralizes the spacecraft potential by releasing positively charged Indium ions. The ASPOCs neutralize the electrical potential of the spacecraft, limiting or eliminating spurious electric fields that can contaminate measurements. This allows observations of the more scientifically important low-energy ions and electrons.",
        "Acknowledgement": "K. Torkar, R. Nakamura, Refer to Institut fur Weltraumforschung (IWF), Osterreichische Akademie der Wissenschaften (OAW) for rules of acknowledgement",
        "Contact": [
          {
            "PersonID": "spase://SMWG/Person/Klaus.M.Torkar",
            "Role": "PrincipalInvestigator"
          },
          {
            "PersonID": "spase://SMWG/Person/Rumi.Nakamura",
            "Role": "PrincipalInvestigator"
          },
          {
            "PersonID": "spase://SMWG/Person/Robert.E.McGuire",
            "Role": "MetadataContact"
          },
          {
            "PersonID": "spase://SMWG/Person/Lee.Frost.Bargatze",
            "Role": "MetadataContact"
          }
        ],
        "InformationURL": [
          {
            "Name": "The Magnetospheric Multiscale (MMS) Mission home page at Goddard Space Flight Center (GSFC)",
            "URL": "https://mms.gsfc.nasa.gov/",
            "Description": "The Magnetospheric Multiscale (MMS) Mission Home Page hosted by the Goddard Space Flight Center (GSFC)."
          },
          {
            "Name": "Data Caveats and Current Release Notes at LASP MMS SDC",
            "URL": "https://lasp.colorado.edu/mms/sdc/public/datasets/aspoc/",
            "Description": "The Magnetospheric Multiscale (MMS) Mission home page hosted by the Laboratory of Atmospheric and Space Physics, Science Data Center (LASP, SDC) at the University of Colorado, Boulder."
          },
          {
            "Name": "The MMS Graz ASPOC Team home page at IWF, OAW",
            "URL": "https://www.oeaw.ac.at/en/iwf/research/space-missions/current-missions/magnetospheric-multiscale/aspoc",
            "Description": "The Magnetospheric Multiscale (MMS) ASPOC home page hosted by the Graz ASPOC team located at the Institut fur Weltraumforschung (IWF), Osterreichische Akademie der Wissenschaften (OAW)."
          }
        ],
        "PriorID": "spase://VSPO/NumericalData/MMS/2/ASPOC/Survey/Level2/PT1S"
      },
      "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/mms/mms2/aspoc/srvy/l2/",
              "Description": "In CDF via ftp from SPDF."
            },
            {
              "Name": "HTTPS from SPDF",
              "URL": "https://spdf.gsfc.nasa.gov/pub/data/mms/mms2/aspoc/srvy/l2/",
              "Description": "In CDF via http from SPDF."
            },
            {
              "Name": "CDAWeb",
              "URL": "https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=MMS2_ASPOC_SRVY_L2&index=sp_phys",
              "ProductKey": "MMS2_ASPOC_SRVY_L2",
              "Description": "Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb"
            }
          ],
          "Format": "CDF",
          "Encoding": "None",
          "Acknowledgement": "K. Torkar, R. Nakamura, Refer to Institut fur Weltraumforschung (IWF), Osterreichische Akademie der Wissenschaften (OAW) for rules of acknowledgement. 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": "MMS2_ASPOC_SRVY_L2",
            "Description": "Web Service to this product using the HAPI interface."
          },
          "Format": "CSV",
          "Acknowledgement": "K. Torkar, R. Nakamura, Refer to Institut fur Weltraumforschung (IWF), Osterreichische Akademie der Wissenschaften (OAW) for rules of acknowledgement. Please acknowledge the data providers and CDAWeb when using these data."
        }
      ],
      "ProcessingLevel": "Calibrated",
      "InstrumentID": "spase://SMWG/Instrument/MMS/2/InstrumentControl/ASPOC",
      "MeasurementType": "InstrumentStatus",
      "TemporalDescription": {
        "TimeSpan": {
          "StartDate": "2015-05-06T00:00:00.000",
          "RelativeStopDate": "-P2M"
        },
        "Cadence": "PT1S"
      },
      "ObservedRegion": [
        "Earth.Magnetosheath",
        "Earth.Magnetosphere",
        "Earth.Magnetosphere.Magnetotail",
        "Earth.Magnetosphere.Main",
        "Earth.Magnetosphere.RadiationBelt",
        "Earth.NearSurface.EquatorialRegion",
        "Earth.NearSurface.Plasmasphere",
        "Heliosphere.NearEarth"
      ],
      "Parameter": [
        {
          "Name": "Epoch",
          "ParameterKey": "Epoch",
          "Description": "Interval centered time tag rounded to nearest msecond",
          "Caveats": "This parameter exhibits an increasing monotonic progression.",
          "Cadence": "PT1S",
          "Units": "ns",
          "UnitsConversion": "1.0e-9>s",
          "RenderingHints": {
            "DisplayType": "TimeSeries",
            "AxisLabel": "Epoch",
            "ScaleMin": "6.2798349819904e+13",
            "ScaleMax": "6.6269642620904e+13",
            "ScaleType": "LinearScale"
          },
          "ValidMin": "1990-01-01T00:00:00.000000000",
          "ValidMax": "2100-01-01T00:00:01.000000000",
          "FillValue": "9999-12-31T23:59:59.999999999",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Beam Current Sum",
          "Set": "Time series defined by using:  EPOCH",
          "ParameterKey": "mms2_aspoc_ionc",
          "Description": "ASPOC Ion Emission Current Sum",
          "Cadence": "PT1S",
          "Units": "uA",
          "UnitsConversion": "1.0e-6>A",
          "RenderingHints": {
            "DisplayType": "TimeSeries",
            "AxisLabel": "I_ion",
            "ValueFormat": "f5.1",
            "ScaleMin": "0.0",
            "ScaleMax": "100.0",
            "ScaleType": "LinearScale"
          },
          "ValidMin": "0.0",
          "ValidMax": "100.0",
          "FillValue": "-1.0e+31",
          "Particle": {
            "ParticleType": "Ion",
            "Qualifier": "Median",
            "ParticleQuantity": "CountRate"
          }
        },
        {
          "Name": "Beam Current, Unit 1",
          "Set": "Time series defined by using:  EPOCH",
          "ParameterKey": "mms2_asp1_ionc",
          "Description": "ASPOC Unit 1 Ion Emission Current",
          "Cadence": "PT1S",
          "Units": "uA",
          "UnitsConversion": "1.0e-6>A",
          "RenderingHints": {
            "DisplayType": "TimeSeries",
            "AxisLabel": "I_ion",
            "ValueFormat": "f5.1",
            "ScaleMin": "0.0",
            "ScaleMax": "100.0",
            "ScaleType": "LinearScale"
          },
          "ValidMin": "0.0",
          "ValidMax": "100.0",
          "FillValue": "-1.0e+31",
          "Particle": {
            "ParticleType": "Ion",
            "Qualifier": "Median",
            "ParticleQuantity": "CountRate"
          }
        },
        {
          "Name": "Beam Current, Unit 2",
          "Set": "Time series defined by using:  EPOCH",
          "ParameterKey": "mms2_asp2_ionc",
          "Description": "ASPOC Unit 2 Ion Emission Current",
          "Cadence": "PT1S",
          "Units": "uA",
          "UnitsConversion": "1.0e-6>A",
          "RenderingHints": {
            "DisplayType": "TimeSeries",
            "AxisLabel": "I_ion",
            "ValueFormat": "f5.1",
            "ScaleMin": "0.0",
            "ScaleMax": "100.0",
            "ScaleType": "LinearScale"
          },
          "ValidMin": "0.0",
          "ValidMax": "100.0",
          "FillValue": "-1.0e+31",
          "Particle": {
            "ParticleType": "Ion",
            "Qualifier": "Median",
            "ParticleQuantity": "CountRate"
          }
        },
        {
          "Name": "Beam Energy, Unit 1",
          "Set": "Time series defined by using:  EPOCH",
          "ParameterKey": "mms2_asp1_energy",
          "Description": "ASPOC Unit 1 Emitted Beam Energy",
          "Cadence": "PT1S",
          "Units": "kV",
          "UnitsConversion": "1.0e3>V",
          "RenderingHints": {
            "DisplayType": "TimeSeries",
            "AxisLabel": "Energy",
            "ValueFormat": "f5.2",
            "ScaleMin": "0.0",
            "ScaleMax": "12.5",
            "ScaleType": "LinearScale"
          },
          "ValidMin": "0.0",
          "ValidMax": "12.5",
          "FillValue": "-1.0e+31",
          "Particle": {
            "ParticleType": "Ion",
            "Qualifier": "Median",
            "ParticleQuantity": "Energy"
          }
        },
        {
          "Name": "Beam Energy, Unit 2",
          "Set": "Time series defined by using:  EPOCH",
          "ParameterKey": "mms2_asp2_energy",
          "Description": "ASPOC Unit 2 Emitted Beam Energy",
          "Cadence": "PT1S",
          "Units": "kV",
          "UnitsConversion": "1.0e3>V",
          "RenderingHints": {
            "DisplayType": "TimeSeries",
            "AxisLabel": "Energy",
            "ValueFormat": "f5.2",
            "ScaleMin": "0.0",
            "ScaleMax": "12.5",
            "ScaleType": "LinearScale"
          },
          "ValidMin": "0.0",
          "ValidMax": "12.5",
          "FillValue": "-1.0e+31",
          "Particle": {
            "ParticleType": "Ion",
            "Qualifier": "Median",
            "ParticleQuantity": "Energy"
          }
        },
        {
          "Name": "Instrument Status",
          "Set": "Time series defined by using:  EPOCH",
          "ParameterKey": "mms2_aspoc_status",
          "Description": "ASPOC Instrument Status",
          "Cadence": "PT1S",
          "RenderingHints": {
            "DisplayType": "TimeSeries",
            "ValueFormat": "i3",
            "ScaleType": "LinearScale"
          },
          "Structure": {
            "Size": "4",
            "Element": [
              {
                "Name": "Data Quality",
                "Index": "1",
                "RenderingHints": {
                  "AxisLabel": "Data Quality"
                }
              },
              {
                "Name": "Unit 1 Mode",
                "Index": "2",
                "RenderingHints": {
                  "AxisLabel": "Unit 1 Mode"
                }
              },
              {
                "Name": "Unit 2 Mode",
                "Index": "3",
                "RenderingHints": {
                  "AxisLabel": "Unit 2 Mode"
                }
              },
              {
                "Name": "On/Off Status",
                "Index": "4",
                "RenderingHints": {
                  "AxisLabel": "On/Off Status"
                }
              }
            ]
          },
          "ValidMin": "0",
          "ValidMax": "254",
          "FillValue": "255",
          "Support": {
            "SupportQuantity": "InstrumentMode"
          }
        },
        {
          "Name": "Half Interval",
          "ParameterKey": "mms2_aspoc_var",
          "Description": "Half width of measurement interval",
          "Cadence": "PT1S",
          "Units": "ns",
          "UnitsConversion": "1.0e-9>s",
          "RenderingHints": {
            "AxisLabel": "Half_int",
            "ValueFormat": "f13.1"
          },
          "ValidMin": "0.0",
          "ValidMax": "1.275e+10",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        }
      ]
    }
  }
}