{
  "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 http://www.spase-group.org/data/schema/spase-2_6_1.xsd",
    "_Note": "Nodes prefixed with a _ are not valid SPASE, but are included for debugging. Values prefixed with a x_ are not valid SPASE but may considered for addition for completeness.",
    "Version": "2.6.1",
    "_MasterURL": "https://cdaweb.gsfc.nasa.gov/pub/software/cdawlib/0JSONS/de2_duct16ms_rpa_00000000_v01.json (from all.xml)",
    "NumericalData": {
      "ResourceID": "spase://NASA/NumericalData/DE2/RPA/PT0.016S",
      "_ResourceID": "Source: https://github.com/rweigel/cdawmeta-spase/blob/main/ResourceID.json",
      "ResourceHeader": {
        "ResourceName": "16-msec total ion densities",
        "_ResourceName": "Source: Master/CDFglobalAttributes/Logical_source_description",
        "AlternateName": "de2_duct16ms_rpa",
        "_AlternateName": "Source: Master/CDFglobalAttributes/Logical_source",
        "_Rights": {
          "Name": "SPDX",
          "Description": "Creative Commons Zero v1.0 Universal",
          "URL": "https://spdx.org/licenses/CC0-1.0.html",
          "SchemeURI": "https://spdx.org/licenses/"
        },
        "InformationURL": [
          {
            "Name": "Readme file at SPDF",
            "URL": "https://spdf.gsfc.nasa.gov/pub/data/de/de2/plasma_rpa/",
            "_Note": "Source: InformationURL.json"
          },
          {
            "Name": "NSSDC's Master Catalog on the Retarding Potential Analyzer (RPA)",
            "URL": "https://nssdc.gsfc.nasa.gov",
            "Description": "The Retarding Potential Analyzer (RPA) measured the bulk ion velocity in the direction of the spacecraft motion, the constituent ion concentrations, and the ion temperature along the satellite path. These parameters were derived from a least squares fit to the ion number flux vs energy curve obtained by sweeping or stepping the voltage applied to the internal retarding grids of the RPA. In addition, a separate wide aperture sensor, a duct sensor, was flown to measure the spectral characteristics of iregularities in the total ion concentration. The measured parameters obtained from this investigation were important to the understanding of mechanisms that influence the plasma; i.e., to understand the coupling between the solar wind and the earth's atmosphere. The measurements were made with a multigridded planar retarding potential analyzer very similar in concept and geometry to the instruments carried on the AE satellites. The retarding potential was variable in the range from approximately +32 to 0 volts. The details of this voltage trace, and whether it was continuous or stepped, depended on the operating mode of the instrument. Specific parameters deduced from these measurements were ion temperature; vehicle potential; ram component of the ion drift velocity; the ion and electron concentration irregularity spectrum; and the concentration of H+, He+, O+, and Fe+, and of molecular ions near perigee. Additional details are in W. B. Hanson et al., Space Sci. Instrum., v. 5, n. 4, p. 503, 1981.",
            "_Note": "Source: InformationURL.json"
          }
        ]
      },
      "ProviderResourceName": "DE-2 RPA 1/64-sec Total Ion Density",
      "DOI": "https://doi.org/10.48322/aab6-jj49",
      "_DOI": "Source: https://github.com/rweigel/cdawmeta-spase/blob/main/DOI.json",
      "AccessInformation": [
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "Acknowledgement": "SPDF/CDAWeb. Please also acknowledge the data producer: Rod Heelis at University of Texas, Dallas",
          "Format": [
            "CDF"
          ],
          "Style": "Listing",
          "AccessURL": {
            "Name": "HTTPS from SPDF",
            "URL": "https://cdaweb.gsfc.nasa.gov/pub/data/de/de2/plasma_rpa/rpa16ms_cdaweb",
            "Description": "In CDF via HTTP from CDAWeb",
            "AccessFilenameTemplate": "de2_duct16ms_rpa_%Y%m%d_%Q.cdf",
            "AccessDirectoryTemplate": "%Y",
            "ProductKey": "DE2_DUCT16MS_RPA"
          }
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "Acknowledgement": "SPDF/CDAWeb. Please also acknowledge the data producer: Rod Heelis at University of Texas, Dallas",
          "Format": [
            "CDF"
          ],
          "Style": "Listing",
          "AccessURL": {
            "Name": "FTPS from SPDF",
            "URL": "ftps://cdaweb.gsfc.nasa.gov/pub/data/de/de2/plasma_rpa/rpa16ms_cdaweb",
            "Description": "In CDF via HTTP from CDAWeb",
            "AccessFilenameTemplate": "de2_duct16ms_rpa_%Y%m%d_%Q.cdf",
            "AccessDirectoryTemplate": "%Y",
            "ProductKey": "DE2_DUCT16MS_RPA"
          }
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "Acknowledgement": "SPDF/CDAWeb. Please also acknowledge the data producer: Rod Heelis at University of Texas, Dallas",
          "Format": [
            "CDF",
            "CSV",
            "GIF",
            "NetCDF",
            "PNG",
            "PS",
            "PDF",
            "XML",
            "x_Script.IDL",
            "x_Script.Python",
            "Text.ASCII",
            "x_WAV"
          ],
          "AccessURL": {
            "Name": "CDAWeb Web Service",
            "URL": "https://cdaweb.gsfc.nasa.gov/WebServices/",
            "Style": "WebService",
            "Description": "Instructions for using web services to access this dataset an other other metadata and options for CDAWeb datasets. The ProductKey here corresponds to the query parameter 'dataset' in the tables at the AccessURL in a dataset-related request can be made.",
            "ProductKey": "DE2_DUCT16MS_RPA"
          }
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "Acknowledgement": "SPDF/CDAWeb. Please also acknowledge the data producer: Rod Heelis at University of Texas, Dallas",
          "Format": [
            "CDF",
            "GIF",
            "PDF",
            "Text.ASCII",
            "x_WAV"
          ],
          "AccessURL": {
            "Name": "CDAWeb Web Service user interface",
            "URL": "https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?index=sp_phys&dataset=DE2_DUCT16MS_RPA",
            "Style": "WebService",
            "ProductKey": "DE2_DUCT16MS_RPA",
            "Description": "Web service user interface for this product."
          }
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "Acknowledgement": "SPDF/CDAWeb. Please also acknowledge the data producer: Rod Heelis at University of Texas, Dallas",
          "Format": [
            "x_Script.IDL",
            "x_Script.Python"
          ],
          "AccessURL": {
            "Name": "CDAWeb Python Script",
            "URL": "https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/DE2_DUCT16MS_RPA/clientLibraryExample/",
            "ProductKey": "DE2_DUCT16MS_RPA",
            "Style": "WebService",
            "Description": "Web service that generates a Python script to access this product."
          }
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "Acknowledgement": "SPDF/SSCWeb. Please also acknowledge the data producer: Rod Heelis at University of Texas, Dallas",
          "Format": [
            "HTML"
          ],
          "AccessURL": {
            "Name": "4D Orbit Viewer",
            "URL": "https://sscweb.gsfc.nasa.gov/4dorbit/?sc=DE2_DUCT16MS_RPA",
            "ProductKey": "DE2_DUCT16MS_RPA",
            "Style": "x_Visualization",
            "Description": "Web Service to this product."
          }
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "Acknowledgement": "SPDF/CDAWeb and the HAPI project. Please also acknowledge the data producer: Rod Heelis at University of Texas, Dallas",
          "Format": [
            "CSV",
            "JSON",
            "Binary"
          ],
          "AccessURL": {
            "Name": "CDAWeb HAPI Server",
            "URL": "https://hapi-server.org/servers/#server=CDAWeb&dataset=DE2_DUCT16MS_RPA@0",
            "Style": "HAPI",
            "ProductKey": [
              "DE2_DUCT16MS_RPA@0",
              "DE2_DUCT16MS_RPA@1",
              "DE2_DUCT16MS_RPA@2",
              "DE2_DUCT16MS_RPA@3",
              "DE2_DUCT16MS_RPA@4",
              "DE2_DUCT16MS_RPA@5",
              "DE2_DUCT16MS_RPA@6",
              "DE2_DUCT16MS_RPA@7"
            ],
            "Description": "Web Service to this product using the HAPI interface. Note that HAPI dataset has a collection of parameters, each having the same time stamps. This CDAWeb dataset contains 8 HAPI-type datasets. The @0, @1, ... at the end of the ParameterKeys indicates the index of the CDAWeb dataset. (The dataset index <=> CDF file time variable pairs are @0 => Epoch_den, @1 => Epoch_wb1, @2 => Epoch_wb2, @3 => Epoch_wb3, @4 => Epoch_wb4, @5 => Epoch_wb5, @6 => Epoch_wb6, @7 => Epoch.)"
          }
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "Acknowledgement": "SPDF/CDAWeb and the HAPI project. Please also acknowledge the data producer: Rod Heelis at University of Texas, Dallas",
          "Format": [
            "x_Script.IDL",
            "x_Script.Javascript",
            "x_Script.MATLAB",
            "x_Script.Python",
            "x_Script.Autoplot",
            "x_Script.curl",
            "x_Script.wget"
          ],
          "AccessURL": {
            "Name": "CDAWeb HAPI Script in Multiple Languages",
            "URL": "https://hapi-server.org/servers/#server=CDAWeb&dataset=DE2_DUCT16MS_RPA@0&return=script",
            "Style": "HAPI",
            "ProductKey": [
              "DE2_DUCT16MS_RPA@0",
              "DE2_DUCT16MS_RPA@1",
              "DE2_DUCT16MS_RPA@2",
              "DE2_DUCT16MS_RPA@3",
              "DE2_DUCT16MS_RPA@4",
              "DE2_DUCT16MS_RPA@5",
              "DE2_DUCT16MS_RPA@6",
              "DE2_DUCT16MS_RPA@7"
            ],
            "Description": "Web Service user interface that generates scripts in IDL, Javascript, MATLAB, Python, Autoplot, curl, wget to access this product. See https://hapi-server.org/servers/api for the API. Note that HAPI dataset has a collection of parameters, each having the same time stamps. This CDAWeb dataset contains 8 HAPI-type datasets. The @0, @1, ... at the end of the ParameterKeys indicates the index of the CDAWeb dataset. (The dataset index <=> CDF file time variable pairs are @0 => Epoch_den, @1 => Epoch_wb1, @2 => Epoch_wb2, @3 => Epoch_wb3, @4 => Epoch_wb4, @5 => Epoch_wb5, @6 => Epoch_wb6, @7 => Epoch.)"
          }
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "Acknowledgement": "SPDF/CDAWeb and the HAPI project. Please also acknowledge the data producer: Rod Heelis at University of Texas, Dallas",
          "Format": [
            "PNG",
            "PDF",
            "SVG"
          ],
          "AccessURL": {
            "Name": "HAPI visualizations",
            "URL": "https://hapi-server.org/plot/?server=https://cdaweb.gsfc.nasa.gov/hapi&dataset=DE2_DUCT16MS_RPA@0&format=gallery",
            "Style": "x_Visualization",
            "ProductKey": [
              "DE2_DUCT16MS_RPA@0",
              "DE2_DUCT16MS_RPA@1",
              "DE2_DUCT16MS_RPA@2",
              "DE2_DUCT16MS_RPA@3",
              "DE2_DUCT16MS_RPA@4",
              "DE2_DUCT16MS_RPA@5",
              "DE2_DUCT16MS_RPA@6",
              "DE2_DUCT16MS_RPA@7"
            ],
            "Description": "Web Service that generates plots. See https://hapi-server.org/plot/ for the API."
          }
        }
      ],
      "_AccessInformation": "Source: https://github.com/rweigel/cdawmeta-spase/blob/main/AccessInformation.json",
      "TemporalDescription": {
        "TimeSpan": {
          "StartDate": "1981-08-03T10:49:21Z",
          "StopDate": "1983-02-17T19:54:44Z"
        },
        "_TemporalDescription": "Generated from all.xml/@timerange_start and all.xml/@timerange_stop"
      },
      "Keyword": [
        "Dynamics Explorer (from all.xml/observatory/description/@short)",
        "Duct 16ms (from all.xml/instrument/description/@short)",
        "Space Physics (from Master/CDFglobalAttributes/Discipline)",
        "Magnetospheric  Ionospheric Interactions (from Master/CDFglobalAttributes/Discipline)",
        "DE (from Master/CDFglobalAttributes/Source_name)",
        "Dynamics Explorer (from Master/CDFglobalAttributes/Source_name)",
        "rpa (from Master/CDFglobalAttributes/Data_type)",
        "Retarding PotentialAnalyzer (from Master/CDFglobalAttributes/Data_type)",
        "duct16ms (from all.xml/instrument/@ID)"
      ],
      "ObservedRegion": [
        "Earth.Magnetosphere",
        "Earth.NearSurface.Ionosphere",
        "Earth.NearSurface.AuroralRegion",
        "Earth.NearSurface.EquatorialRegion",
        "Earth.NearSurface.Thermosphere",
        "Earth.Magnetosphere.Polar",
        "Earth.NearSurface.PolarCap",
        "Earth.NearSurface.Atmosphere",
        "Earth.NearSurface"
      ],
      "_ObservedRegion": "Source: https://github.com/rweigel/cdawmeta-spase/blob/main/ObservedRegion.json",
      "ProcessingLevel": null,
      "_ProcessingLevel": "Processing level is not available in the master file; it should be there instead of, say, https://github.com/rweigel/cdawmeta-spase/blob/main/ProcessingLevel.json",
      "InstrumentID": "spase://SMWG/Instrument/DynamicsExplorer2/RPA",
      "MeasurementType": "ThermalPlasma",
      "Parameter2": [
        {
          "Name": "Time since 0 A.D. den",
          "ParameterKey": "Epoch_den",
          "Description": "CATDESC: 'NSSDC standard-reference time value (ion density). '. Notes not in Master CDF: 'The units are the units in CDF files. For other web services, this variable is may be represented as a time string.'",
          "Units": "ms (UT) ",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Ion Density",
          "ParameterKey": "ionDensity",
          "Description": "Master CDF CATDESC: 'Total ion (number) density in cm-3'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_den.'",
          "Units": "cm-3",
          "FillValue": -1e-31
        },
        {
          "Name": "Time since 0 A.D.",
          "ParameterKey": "Epoch",
          "Description": "CATDESC: 'NSSDC standard-reference time value. '. Notes not in Master CDF: 'The units are the units in CDF files. For other web services, this variable is may be represented as a time string.'",
          "Units": "ms (UT) ",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Number of density measurements",
          "ParameterKey": "numDensity",
          "Description": "Master CDF CATDESC: 'Number of ion density measurements per data file'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.'",
          "Units": " ",
          "FillValue": -1
        },
        {
          "Name": "Geographic Latitude",
          "ParameterKey": "glat",
          "Description": "Master CDF CATDESC: 'Geographic Latitude in degrees'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.'",
          "Units": "deg",
          "FillValue": 0.0
        },
        {
          "Name": "Geographic Longitude",
          "ParameterKey": "glon",
          "Description": "Master CDF CATDESC: 'Geographic Longitude in degrees'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.'",
          "Units": "deg",
          "FillValue": 0.0
        },
        {
          "Name": "Invariant Latitude",
          "ParameterKey": "ilat",
          "Description": "Master CDF CATDESC: 'Invariant Latitude in degrees'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.'",
          "Units": "deg",
          "FillValue": 0.0
        },
        {
          "Name": "Mag. Local Time",
          "ParameterKey": "mlt",
          "Description": "Master CDF CATDESC: 'Magnetic Local Time'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.'",
          "Units": "hr",
          "FillValue": 0.0
        },
        {
          "Name": "Altitude",
          "ParameterKey": "alt",
          "Description": "Master CDF CATDESC: 'Altitude in km'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.'",
          "Units": "km",
          "FillValue": 0.0
        },
        {
          "Name": "Time since 0 A.D.  wide-band 1",
          "ParameterKey": "Epoch_wb1",
          "Description": "CATDESC: 'NSSDC standard-reference time value (wide-band 1). '. Notes not in Master CDF: 'The units are the units in CDF files. For other web services, this variable is may be represented as a time string.'",
          "Units": "ms (UT) ",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Spec. power filter 1",
          "ParameterKey": "wb1",
          "Description": "Master CDF CATDESC: 'Spectral power in wide band filter 1 (630 - 1700 Hz)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_wb1.'",
          "Units": "1/Hz",
          "FillValue": 0.0
        },
        {
          "Name": "Time since 0 A.D.  wide-band 2",
          "ParameterKey": "Epoch_wb2",
          "Description": "CATDESC: 'NSSDC standard-reference time value (wide-band 2). '. Notes not in Master CDF: 'The units are the units in CDF files. For other web services, this variable is may be represented as a time string.'",
          "Units": "ms (UT) ",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Spec. power filter 2",
          "ParameterKey": "wb2",
          "Description": "Master CDF CATDESC: 'Spectral power in wide band filter 2 (86 - 233 Hz)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_wb2.'",
          "Units": "1/Hz",
          "FillValue": 0.0
        },
        {
          "Name": "Time since 0 A.D.  wide-band 3",
          "ParameterKey": "Epoch_wb3",
          "Description": "CATDESC: 'NSSDC standard-reference time value (wide-band 3). '. Notes not in Master CDF: 'The units are the units in CDF files. For other web services, this variable is may be represented as a time string.'",
          "Units": "ms (UT) ",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Spec. power filter 3",
          "ParameterKey": "wb3",
          "Description": "Master CDF CATDESC: 'Spectral power in wide band filter 3 (1700 - 4600 Hz)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_wb3.'",
          "Units": "1/Hz",
          "FillValue": 0.0
        },
        {
          "Name": "Time since 0 A.D.  wide-band 4",
          "ParameterKey": "Epoch_wb4",
          "Description": "CATDESC: 'NSSDC standard-reference time value (wide-band 4). '. Notes not in Master CDF: 'The units are the units in CDF files. For other web services, this variable is may be represented as a time string.'",
          "Units": "ms (UT) ",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Spec. power filter 4",
          "ParameterKey": "wb4",
          "Description": "Master CDF CATDESC: 'Spectral power in wide band filter 4 (233 - 630 Hz)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_wb4.'",
          "Units": "1/Hz",
          "FillValue": 0.0
        },
        {
          "Name": "Time since 0 A.D.  wide-band 5",
          "ParameterKey": "Epoch_wb5",
          "Description": "CATDESC: 'NSSDC standard-reference time value (wide-band 5). '. Notes not in Master CDF: 'The units are the units in CDF files. For other web services, this variable is may be represented as a time string.'",
          "Units": "ms (UT) ",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Spec. power filter 5",
          "ParameterKey": "wb5",
          "Description": "Master CDF CATDESC: 'Spectral power in wide band filter 5 (4600 - 12400 Hz)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_wb5.'",
          "Units": "1/Hz",
          "FillValue": 0.0
        },
        {
          "Name": "Time since 0 A.D.  wide-band 6",
          "ParameterKey": "Epoch_wb6",
          "Description": "CATDESC: 'NSSDC standard-reference time value (wide-band 6). '. Notes not in Master CDF: 'The units are the units in CDF files. For other web services, this variable is may be represented as a time string.'",
          "Units": "ms (UT) ",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Spec. power filter 6",
          "ParameterKey": "wb6",
          "Description": "Master CDF CATDESC: 'Spectral power in wide band filter 6 (32 - 86 Hz)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_wb6.'",
          "Units": "1/Hz",
          "FillValue": 0.0
        }
      ]
    }
  }
}