{
  "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/voyager2_48s_mag-vim_00000000_v01.json (from all.xml)",
    "NumericalData": {
      "ResourceID": "spase://NASA/NumericalData/Voyager2/MAG/VIM/CDF/PT48S",
      "_ResourceID": "Source: https://github.com/rweigel/cdawmeta-spase/blob/main/ResourceID.json",
      "ResourceHeader": {
        "ResourceName": "Voyager2 Magnetic field VIM",
        "_ResourceName": "Source: Master/CDFglobalAttributes/Logical_source_description",
        "AlternateName": "voyager2_48s_mag-vim",
        "_AlternateName": "Source: Master/CDFglobalAttributes/Logical_source",
        "Description": "The  main science objectives for the VOYAGER interplanetary mission are as   follows: - investigate the structure of the solar wind magnetic fields and plasma in the inner and outer heliosphere; - conduct long term study of heliospheric evolution during different phases of the twenty-two year solar magnetic cycle and the eleven-year solar activity cycle;- study the long term solar modulation and determine the elemental and isotopic abundances of galactic cosmic ray particles in the heliosphere;- measure  radial gradients, spectra, and nuclear abundances of the anomalous component of cosmic rays  from  acceleration at the solar wind termination shock; - investigate local particle acceleration in the interplanetary medium from solar flare shocks and corotating interaction regions; - study propagation of solar energetic particles in the heliosphere.The average magnetic field strength produced by the spacecraft at the location of the outboard magnetometer of the dual magnetometers system on V1 and V2 is about 0.1 - 0.2 nT, comparable to the most probable magnetic field strength in the inner heliosheath and significantly larger than the most probable magnetic field strength in the distant supersonic solar wind. The spacecraft magnetic field is a complex, time-dependent signal that must be removed from the measured magnetic field signal in order to derive the ambient magnetic fields of the solar wind and heliosheath. Corrections must also be made for spurious magnetic signals and noise associated with the telemetry system, ground tracking systems, and other factors. Extracting the signal describing the solar wind and heliosheath from the many sources of uncertainty is a complex and partly subjective process that requires understanding of the instrument and judgment based on experience in dealing with the ever-changing extraneous signals. We estimate that for the V1 MAG data the 1-sigma the uncertainty the 48 sec averages for each of the components of the magnetic field  BR, BT, and BN is typically +/- 0.02 nT; the uncertainty in magnitude F1 is typically +/- 0.03 nT. F1, BR, BT, and BN can differ from one another and they may vary with time, but there is no practical way to determine these uncertainties more precisely at present.ReferencesDaniel B. Berdichevsky, Voyager Mission, Detailed processing of weak magnetic fields; I - Constraints to the uncertainties of the calibrated magnetic field signal in the Voyager missions , 2009; https://vgrmag.gsfc.nasa.gov/Berdichevsky-VOY_sensor_opu090518.pdfBehannon, K.W., M.H. Acu..a, L.F. Burlaga, R.P. Lepping, N.F. Ness, and F.M. Neubauer, Magnetic-Field Experiment for Voyager-1 and Voyager-2, Space Science Reviews, 21 (3), 235-257, 1977. Burlaga, L.F., Merged interaction regions and large-scale magnetic field fluctuations during 1991 - Voyager-2 observations, J. Geophys. Res., 99 (A10), 19341-19350, 1994.Burlaga, L.F., N.F. Ness, Y.-M. Wang, and N.R. Sheeley Jr., Heliospheric magnetic field strength and polarity from 1 to 81 AU during the ascending phase of solar cycle 23, J. Geophys. Res., 107 (A11), 1410, 2002.Ness, N., K.W. Behannon, R. Lepping, and K.H. Schatten, J. Geophys. Res., , 76, 3564, 1971.",
        "_Description": "Source: Master/CDFglobalAttributes/TEXT",
        "Acknowledgement": " Please acknowledge the Principal Investigator, Norman F. Ness of the Bartol Research Institute, University of Delaware, and the NASA National Space Science Data Center (NSSDC) for usage of data from this site in publications and presentations.",
        "_Acknowledgement": "Source: Master/CDFglobalAttributes/Acknowledgement",
        "_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": [
          {
            "URL": "http://cohoweb.gsfc.nasa.gov",
            "Name": "COHOWeb Service",
            "Description": "Voyager2 merged magnetic field and plasma hourly data from ",
            "_Note": "URL also in all.xml. Using master."
          },
          {
            "Name": "COHOWeb Service",
            "URL": "https://cohoweb.gsfc.nasa.gov",
            "Description": "Voyager 1 merged Magnetic Field and Ephemeris Data from COHOWeb",
            "_Note": "Source: InformationURL.json"
          }
        ]
      },
      "ProviderResourceName": "VOYAGER2",
      "Caveats": " ",
      "_Caveats": "Source: Master/CDFglobalAttributes/Rules_of_use",
      "DOI": "https://doi.org/10.48322/kgbb-j403",
      "_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: Adam Szabo at NASA GSFC",
          "Format": [
            "CDF"
          ],
          "Style": "Listing",
          "AccessURL": {
            "Name": "HTTPS from SPDF",
            "URL": "https://cdaweb.gsfc.nasa.gov/pub/data/voyager/voyager2/magnetic_fields_cdaweb/vim_48secmag",
            "Description": "In CDF via HTTP from CDAWeb",
            "AccessFilenameTemplate": "voyager2_48s_mag-vim_%Y%m%d_%Q.cdf",
            "ProductKey": "VOYAGER2_48S_MAG-VIM"
          }
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "Acknowledgement": "SPDF/CDAWeb. Please also acknowledge the data producer: Adam Szabo at NASA GSFC",
          "Format": [
            "CDF"
          ],
          "Style": "Listing",
          "AccessURL": {
            "Name": "FTPS from SPDF",
            "URL": "ftps://cdaweb.gsfc.nasa.gov/pub/data/voyager/voyager2/magnetic_fields_cdaweb/vim_48secmag",
            "Description": "In CDF via HTTP from CDAWeb",
            "AccessFilenameTemplate": "voyager2_48s_mag-vim_%Y%m%d_%Q.cdf",
            "ProductKey": "VOYAGER2_48S_MAG-VIM"
          }
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "Acknowledgement": "SPDF/CDAWeb. Please also acknowledge the data producer: Adam Szabo at NASA GSFC",
          "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": "VOYAGER2_48S_MAG-VIM"
          }
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "Acknowledgement": "SPDF/CDAWeb. Please also acknowledge the data producer: Adam Szabo at NASA GSFC",
          "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=VOYAGER2_48S_MAG-VIM",
            "Style": "WebService",
            "ProductKey": "VOYAGER2_48S_MAG-VIM",
            "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: Adam Szabo at NASA GSFC",
          "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/VOYAGER2_48S_MAG-VIM/clientLibraryExample/",
            "ProductKey": "VOYAGER2_48S_MAG-VIM",
            "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: Adam Szabo at NASA GSFC",
          "Format": [
            "HTML"
          ],
          "AccessURL": {
            "Name": "4D Orbit Viewer",
            "URL": "https://sscweb.gsfc.nasa.gov/4dorbit/?sc=VOYAGER2_48S_MAG-VIM",
            "ProductKey": "VOYAGER2_48S_MAG-VIM",
            "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: Adam Szabo at NASA GSFC",
          "Format": [
            "CSV",
            "JSON",
            "Binary"
          ],
          "AccessURL": {
            "Name": "CDAWeb HAPI Server",
            "URL": "https://hapi-server.org/servers/#server=CDAWeb&dataset=VOYAGER2_48S_MAG-VIM@0",
            "Style": "HAPI",
            "ProductKey": [
              "VOYAGER2_48S_MAG-VIM@0",
              "VOYAGER2_48S_MAG-VIM@1"
            ],
            "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 2 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, @1 => Epoch_ephem.)"
          }
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "Acknowledgement": "SPDF/CDAWeb and the HAPI project. Please also acknowledge the data producer: Adam Szabo at NASA GSFC",
          "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=VOYAGER2_48S_MAG-VIM@0&return=script",
            "Style": "HAPI",
            "ProductKey": [
              "VOYAGER2_48S_MAG-VIM@0",
              "VOYAGER2_48S_MAG-VIM@1"
            ],
            "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 2 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, @1 => Epoch_ephem.)"
          }
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "Acknowledgement": "SPDF/CDAWeb and the HAPI project. Please also acknowledge the data producer: Adam Szabo at NASA GSFC",
          "Format": [
            "PNG",
            "PDF",
            "SVG"
          ],
          "AccessURL": {
            "Name": "HAPI visualizations",
            "URL": "https://hapi-server.org/plot/?server=https://cdaweb.gsfc.nasa.gov/hapi&dataset=VOYAGER2_48S_MAG-VIM@0&format=gallery",
            "Style": "x_Visualization",
            "ProductKey": [
              "VOYAGER2_48S_MAG-VIM@0",
              "VOYAGER2_48S_MAG-VIM@1"
            ],
            "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": "2009-01-31T11:01:29Z",
          "StopDate": "2022-12-31T23:59:52Z"
        },
        "_TemporalDescription": "Generated from all.xml/@timerange_start and all.xml/@timerange_stop"
      },
      "Keyword": [
        "Voyager 1 (from all.xml/observatory/description/@short)",
        "Magnetic Field VIM (from all.xml/instrument/description/@short)",
        "Space Physics (from Master/CDFglobalAttributes/Discipline)",
        "Interplanetary Studies (from Master/CDFglobalAttributes/Discipline)",
        "Solar Physics (from Master/CDFglobalAttributes/Discipline)",
        "Heliospheric Physics (from Master/CDFglobalAttributes/Discipline)",
        "VOYAGER2 (from Master/CDFglobalAttributes/Source_name)",
        "Voyager 1 (from Master/CDFglobalAttributes/Source_name)",
        "48SEC (from Master/CDFglobalAttributes/Data_type)",
        "48 second Time Resolution (from Master/CDFglobalAttributes/Data_type)",
        "VIM (from all.xml/instrument/@ID)"
      ],
      "ObservedRegion": [
        "Heliosphere.Heliosheath",
        "Heliosphere.Outer",
        "Heliosphere"
      ],
      "_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/Voyager2/MAG",
      "MeasurementType": "MagneticField",
      "Parameter2": [
        {
          "Name": "Time",
          "ParameterKey": "Epoch",
          "Description": "CATDESC: 'Time, beginning of interval'. 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",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "spacecraft ID",
          "ParameterKey": "spacecraftID",
          "Description": "Master CDF CATDESC: 'spacecraft ID: 1=voyager2, 2=voyager2'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.'",
          "Units": " ",
          "FillValue": 9
        },
        {
          "Name": "B Field Magnitude",
          "ParameterKey": "F1",
          "Description": "Master CDF CATDESC: 'B Field Magnitude (average of fine scale magnitudes)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.'",
          "Units": "nT",
          "FillValue": -1e+31
        },
        {
          "Name": "BR in RTN",
          "ParameterKey": "BR",
          "Description": "Master CDF CATDESC: 'BR in RTN (Radial-Tangential-Normal) coordinate system (w/ uncertainty)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.'",
          "Units": "nT",
          "FillValue": -1e+31
        },
        {
          "Name": "BT in RTN",
          "ParameterKey": "BT",
          "Description": "Master CDF CATDESC: 'BT in RTN coordinate system (w/ uncertainty)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.'",
          "Units": "nT",
          "FillValue": -1e+31
        },
        {
          "Name": "BN in RTN",
          "ParameterKey": "BN",
          "Description": "Master CDF CATDESC: 'BN in RTN coordinate system (w/ uncertainty)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.'",
          "Units": "nT",
          "FillValue": -1e+31
        },
        {
          "Name": "Uncertainty in B",
          "ParameterKey": "dF",
          "Description": "Master CDF CATDESC: 'Uncertainty in B'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.'",
          "Units": "nT",
          "FillValue": -1e+31
        },
        {
          "Name": "Uncertainty in BR",
          "ParameterKey": "dBR",
          "Description": "Master CDF CATDESC: 'Uncertainty in BR'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.'",
          "Units": "nT",
          "FillValue": -1e+31
        },
        {
          "Name": "Uncertainty in BT",
          "ParameterKey": "dBT",
          "Description": "Master CDF CATDESC: 'Uncertainty in BT'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.'",
          "Units": "nT",
          "FillValue": -1e+31
        },
        {
          "Name": "Uncertainty in BN",
          "ParameterKey": "dBN",
          "Description": "Master CDF CATDESC: 'Uncertainty in BN'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.'",
          "Units": "nT",
          "FillValue": -1e+31
        },
        {
          "Name": "Time (ephem)",
          "ParameterKey": "Epoch_ephem",
          "Description": "CATDESC: 'Time, beginning of interval (ephem)'. 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",
          "Support": {
            "Qualifier": "Scalar",
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Radius",
          "ParameterKey": "Radius",
          "Description": "Master CDF CATDESC: 'Radius'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_ephem.'",
          "Units": "au",
          "FillValue": -1e+31
        },
        {
          "Name": "hg_lat",
          "ParameterKey": "hg_lat",
          "Description": "Master CDF CATDESC: 'heliographic latitude'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_ephem.'",
          "Units": "deg",
          "FillValue": -1e+31
        },
        {
          "Name": "hg_lon",
          "ParameterKey": "hg_lon",
          "Description": "Master CDF CATDESC: 'heliographic longitude'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_ephem.'",
          "Units": "deg",
          "FillValue": -1e+31
        },
        {
          "Name": "hgi_lon",
          "ParameterKey": "hgi_lon",
          "Description": "Master CDF CATDESC: 'heliographic inertial longitude'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch_ephem.'",
          "Units": "deg",
          "FillValue": -1e+31
        }
      ]
    }
  }
}