{
  "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/TIMED/GUVI/Electron_Density_Product",
      "ResourceHeader": {
        "ResourceName": "TIMED GUVI L2B Electron Density Profiles",
        "ReleaseDate": "2021-06-02T00:00:00Z",
        "Description": "The Level-2 Electron Density Profiles data product contains F-region electron density as a function of altitude and latitude derived from the GUVI limb data.  Summaries of estimated peak electron density and total electron content are also given as Level 3 products.\nThe profiles are derived from the 135.6-nm channel of the GUVI limb data. The 135.6-nm emission at night is due almost exclusively to recombination of O+ ions.  Since O+ is the primary ion in the F region, the 135.6-nm volume emission rate is closely related to the square of the electron density.\nDetails of the procedure of producing the electron densities are given in: DeMajistre, R., L.J. Paxton, D. Morrison, J-H. Yee, L.P. Goncherenko and A.B. Christensen, Retrievals of nighttime electron density from Thermosphere Ionosphere Mesosphere and Dynamics (TIMED) mission Global Ultraviolet Imager (GUVI) Measurements, J. Geophys Res., 109, A05305, doi:10.1029/2003JA010296.\n         ",
        "Acknowledgement": "NASA, Andrew B. Christensen",
        "Contact": {
          "PersonID": "spase://SMWG/Person/Andrew.B.Christensen",
          "Role": "PrincipalInvestigator"
        },
        "InformationURL": {
          "Name": "Electron Density Profiles description",
          "URL": "http://guvitimed.jhuapl.edu/sites/default/files/data/documents/readme_GUVI_Version_13_Limb_Retrievals.pdf"
        },
        "PriorID": [
          "spase://VITMO/NumericalData/TIMED/GUVI/Electron_Density_Product",
          "spase://VSPO/NumericalData/TIMED/GUVI/Electron_Density_Product"
        ]
      },
      "AccessInformation": [
        {
          "RepositoryID": "spase://SMWG/Repository/TIMED/GUVI_POC",
          "Availability": "Online",
          "AccessRights": "Open",
          "AccessURL": {
            "Name": "GUVI POC L2B Electron Density Product (IDLsave) Data Request",
            "URL": "http://guvitimed.jhuapl.edu/data_fetch_l2b_edp_netcdf",
            "Description": "This web page allows the request of data files for this product.  To request data: select the year and day then press display."
          },
          "Format": "NetCDF",
          "Encoding": "None",
          "Acknowledgement": "NASA, Andrew B. Christensen"
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "AccessURL": [
            {
              "Name": "FTP access to files at SPDF",
              "URL": "ftps://spdf.gsfc.nasa.gov/pub/data/timed/guvi/levels/level2b_e/edp/cdf/",
              "Description": "SPDF repository of TIMED Level-2 Electron Density Profiles in CDF format at CDAWeb"
            },
            {
              "Name": "FTPS from SPDF (not with most browsers)",
              "URL": "ftps://spdf.gsfc.nasa.gov/pub/data/timed/guvi/levels/level2b_e/edp/cdf/",
              "Description": "SPDF repository of TIMED Level-2 Electron Density Profiles in CDF format at CDAWeb"
            }
          ],
          "Format": "CDF",
          "Acknowledgement": "Please acknowledge the support from CDAWeb team at GSFC/SPDF."
        },
        {
          "RepositoryID": "spase://SMWG/Repository/NASA/GSFC/SPDF",
          "Availability": "Online",
          "AccessRights": "Open",
          "AccessURL": {
            "Name": "CDAWeb",
            "URL": "https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=TIMED_EDP_GUVI&index=sp_phys",
            "ProductKey": "TIMED_EDP_GUVI",
            "Description": " TIMED GUVI L2 data with subset, plot, list from CDAWeb"
          },
          "Format": "Text",
          "Acknowledgement": "Please acknowledge the support from the CDAWeb team at GSFC/SPDF."
        },
        {
          "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": "TIMED_EDP_GUVI",
            "Description": "Web Service to this product using the HAPI interface."
          },
          "Format": "CSV",
          "Acknowledgement": "Please acknowledge the support from the CDAWeb team at GSFC/SPDF."
        }
      ],
      "ProcessingLevel": "Calibrated",
      "ProviderResourceName": "GUVI L2B Electron Density Product",
      "ProviderProcessingLevel": "Level 2B",
      "InstrumentID": "spase://SMWG/Instrument/TIMED/GUVI",
      "MeasurementType": "Profile",
      "TemporalDescription": {
        "TimeSpan": {
          "StartDate": "2002-03-22T00:00:00.000Z",
          "StopDate": "2007-12-11T00:00:00.000Z"
        }
      },
      "ObservedRegion": "Earth.NearSurface.Ionosphere",
      "Keyword": [
        "TIMED",
        "GUVI",
        "lower thermosphere",
        "MLTI"
      ],
      "Parameter": [
        {
          "Name": "Geographic Latitude",
          "ParameterKey": "glat",
          "Description": "Geographic Latitude (registered at ~300km)",
          "Units": "degrees",
          "Structure": {
            "Size": "0",
            "Description": "Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Positional"
          }
        },
        {
          "Name": "Geographic Longitude",
          "ParameterKey": "glon",
          "Description": "Geographic Longitude (registered at ~300km)",
          "Units": "degrees",
          "Structure": {
            "Size": "0",
            "Description": "Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Positional"
          }
        },
        {
          "Name": "Geomagnetic Latitude",
          "ParameterKey": "mlat",
          "Description": "Geomagnetic (simple dipole) Latitude (registered at ~300km)",
          "Units": "degrees",
          "Structure": {
            "Size": "0",
            "Description": "Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Positional"
          }
        },
        {
          "Name": "Geomagnetic Longitude",
          "ParameterKey": "mlon",
          "Description": "Geomagnetic (simple dipole) Longitude (registered at ~300km)",
          "Units": "degrees",
          "Structure": {
            "Size": "0",
            "Description": "Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Positional"
          }
        },
        {
          "Name": "Time",
          "ParameterKey": "time",
          "Description": "Universal Time of observation in number of milliseconds since start of current day. Timestamp marks beginning of interval",
          "Units": "ms",
          "UnitsConversion": "1e-3>s",
          "Structure": {
            "Size": "0",
            "Description": "Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "ValidMin": "0",
          "ValidMax": "86399999",
          "Support": {
            "SupportQuantity": "Temporal"
          }
        },
        {
          "Name": "Electron Density",
          "ParameterKey": "ep",
          "Description": "Electron Density Profiles Data",
          "Units": "cm-3",
          "Structure": {
            "Size": "23",
            "Description": "Dimensions: [23,n] - where 23 is the number of levels in a profile; n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Particle": {
            "ParticleType": "Electron",
            "ParticleQuantity": "NumberDensity"
          }
        },
        {
          "Name": "Retrieved Uncertainty in Electron Density",
          "ParameterKey": "sigep",
          "Description": "Retrieved Uncertainty in Electron Density",
          "Units": "cm-3",
          "Structure": {
            "Size": "23",
            "Description": "Dimensions: [23,n] - where 23 is the number of levels in a profile; n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Particle": {
            "ParticleType": "Electron",
            "ParticleQuantity": "NumberDensity"
          }
        },
        {
          "Name": "Volume Emission Rate",
          "ParameterKey": "ver",
          "Description": "Volume Emission Rate",
          "Units": "Rayleighs",
          "Structure": {
            "Size": "23",
            "Description": "Dimensions: [23,n] - where 23 is the number of levels in a profile; n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Wave": {
            "WaveType": "Electromagnetic",
            "WaveQuantity": "Emissivity"
          }
        },
        {
          "Name": "Uncertainty in Volume Emission Rate",
          "ParameterKey": "sigver",
          "Description": "Uncertainty in Volume Emission Rate",
          "Units": "Rayleighs",
          "Structure": {
            "Size": "23",
            "Description": "Dimensions: [23,n] - where 23 is the number of levels in a profile; n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Wave": {
            "WaveType": "Electromagnetic",
            "WaveQuantity": "Emissivity"
          }
        },
        {
          "Name": "Atomic Oxygen Density Profile",
          "ParameterKey": "oden",
          "Description": "Atomic Oxygen Density Profile (from MSIS)",
          "Units": "cm-3",
          "Structure": {
            "Size": "23",
            "Description": "Dimensions: [23,n] - where 23 is the number of levels in a profile; n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Particle": {
            "ParticleType": "Atom",
            "ParticleQuantity": "NumberDensity"
          }
        },
        {
          "Name": "Uncorrected Volume Emission Rate",
          "ParameterKey": "ver0",
          "Description": "Volume Emission Rate (no mutual neutralization correction)",
          "Units": "Rayleigh",
          "Structure": {
            "Size": "23",
            "Description": "Dimensions: [23,n] - where 23 is the number of levels in a profile; n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Wave": {
            "WaveType": "Electromagnetic",
            "WaveQuantity": "Emissivity"
          }
        },
        {
          "Name": "Uncertainty in Uncorrected Volume Emission Rate",
          "ParameterKey": "sigver0",
          "Description": "Uncertainty in Volume Emission Rate (no mutual neutralization correction",
          "Units": "Rayleighs",
          "Structure": {
            "Size": "23",
            "Description": "Dimensions: [23,n] - where 23 is the number of levels in a profile; n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Wave": {
            "WaveType": "Electromagnetic",
            "WaveQuantity": "Emissivity"
          }
        },
        {
          "Name": "Chapman Layer Maximum Density",
          "ParameterKey": "nmf2",
          "Description": "Chapman Layer Maximum Density",
          "Units": "cm-3",
          "Structure": {
            "Size": "0",
            "Description": "Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Chapman Layer Maximum Radius",
          "ParameterKey": "rmf2",
          "Description": "Chapman Layer Maximum Radius",
          "Units": "km",
          "Structure": {
            "Size": "0",
            "Description": "Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Chapman Layer Topside Scaleheight",
          "ParameterKey": "hmf2",
          "Description": "Chapman Layer Topside Scaleheight",
          "Units": "unitless",
          "Structure": {
            "Size": "0",
            "Description": "Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Uncertainty in Chapman Layer Maximum Density",
          "ParameterKey": "signmf2",
          "Description": "Uncertainty in Chapman Layer Maximum Density",
          "Units": "cm -3",
          "Structure": {
            "Size": "0",
            "Description": "Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Uncertainty in Chapman Layer Maximum Radius",
          "ParameterKey": "sigrmf2",
          "Description": "Uncertainty in Chapman Layer Maximum Radius",
          "Units": "km",
          "Structure": {
            "Size": "0",
            "Description": "Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Uncertainty in Chapman Layer Topside Scaleheight",
          "ParameterKey": "sighmf2",
          "Description": "Uncertainty in Chapman Layer Topside Scaleheight",
          "Units": "unitless",
          "Structure": {
            "Size": "0",
            "Description": "Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "AACGM Geomagnetic Latitude",
          "ParameterKey": "acmlat",
          "Description": "Geomagnetic (AACGM) Latitude (registered at ~300km)",
          "Units": "degrees",
          "Structure": {
            "Size": "0",
            "Description": "Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Positional"
          }
        },
        {
          "Name": "AACGM Geomagnetic Longitude",
          "ParameterKey": "acmlon",
          "Description": "Geomagnetic (AACGM) Longitude (registered at ~300km)",
          "Units": "degrees",
          "Structure": {
            "Size": "0",
            "Description": "Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Positional"
          }
        },
        {
          "Name": "Earth radius",
          "ParameterKey": "re",
          "Description": "Earth radius at the given geographic latitude",
          "Units": "km",
          "Structure": {
            "Size": "0",
            "Description": "Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Index map",
          "ParameterKey": "ind",
          "Description": "Index map into level 1B file",
          "Units": "unitless",
          "Structure": {
            "Size": "0",
            "Description": "Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "EDP/VER radius grid",
          "ParameterKey": "k_nonpar_r",
          "Description": "EDP/VER radius grid where altitude grid is (k_nonpar_r - re)",
          "Units": "km",
          "Structure": {
            "Size": "23",
            "Description": "Dimensions: [23] - where 23 is the number of levels in a profile."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Observational Angles for Observation",
          "ParameterKey": "k_nonpar_thetapix",
          "Description": "Observational Angles for Observation where tangent altitudes are (625.+Re)*sin(k_nonpar_thetapix) - re",
          "Units": "radian",
          "Structure": {
            "Size": "32",
            "Description": "Dimensions: [32]."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Chapman Layers Parameters Existence flag",
          "ParameterKey": "pf",
          "Description": " If 1, chapman layers parameters present, 0 if not",
          "Structure": {
            "Size": "1",
            "Description": "Dimensions: [1] - a single value per orbital file."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Radiances at 135.6 nm",
          "ParameterKey": "prof",
          "Description": "Radiances at 135.6 nm",
          "Units": "Rayleigh",
          "Structure": {
            "Size": "32  14",
            "Description": "Dimensions: [32,14,n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Uncertainties of Radiances at 135.6 nm",
          "ParameterKey": "dprof",
          "Description": "Uncertainties of Radiances at 135.6 nm",
          "Units": "Rayleigh",
          "Structure": {
            "Size": "32 14",
            "Description": "Dimensions: [32,14,n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "H+ Correction flag",
          "ParameterKey": "hpcor",
          "Description": "H+ correction from IRI made, -1 if not",
          "Structure": {
            "Size": "1",
            "Description": "Dimensions: [1] - a single value per orbital file."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "Number of limb scans for smoothing",
          "ParameterKey": "ncomb(nonvariant_var)",
          "Description": "Number of limb scans for smoothing",
          "Structure": {
            "Size": "1",
            "Description": "Dimensions: [1] - a single value per orbital file."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "k_nonpar_w0",
          "ParameterKey": "k_nonpar_w0",
          "Structure": {
            "Size": "448",
            "Description": "Dimensions: [448,n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "k_nonpar_w1",
          "ParameterKey": "k_nonpar_w1",
          "Structure": {
            "Size": "448",
            "Description": "Dimensions: [448,n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136)."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "k_nonpar_w0c",
          "ParameterKey": "k_nonpar_w0c",
          "Structure": {
            "Size": "32 2",
            "Description": "Dimensions: [32,2]."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "k_nonpar_w1c",
          "ParameterKey": "k_nonpar_w1c",
          "Structure": {
            "Size": "32 2",
            "Description": "Dimensions: [32,2]."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "k_par_r",
          "ParameterKey": "k_par_r",
          "Structure": {
            "Size": "50",
            "Description": "Dimensions: [50]."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "k_par_thetapix",
          "ParameterKey": "k_par_thetapix",
          "Structure": {
            "Size": "32",
            "Description": "Dimensions: [32]."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "k_par_w0",
          "ParameterKey": "k_par_w0",
          "Structure": {
            "Size": "448 50",
            "Description": "Dimensions: [448,50]."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        },
        {
          "Name": "k_par_w1",
          "ParameterKey": "k_par_w1",
          "Structure": {
            "Size": "448 50",
            "Description": "Dimensions: [448,50]."
          },
          "Support": {
            "SupportQuantity": "Other"
          }
        }
      ]
    }
  }
}