<_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. 2.6.1 <_MasterURL>https://cdaweb.gsfc.nasa.gov/pub/software/cdawlib/0JSONS/i2_neprof_topist_00000000_v01.json (from all.xml) spase://NASA/NumericalData/ISIS2/SFS/TOPIST <_ResourceID>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/ResourceID.json ISIS-2 TOPIST produced electron density profiles, of highest quality (quality flag = 2 and 3 <_ResourceName>Source: Master/CDFglobalAttributes/Logical_source_description i2_neprof_topist <_AlternateName>Source: Master/CDFglobalAttributes/Logical_source ISIS 2 was an ionospheric observatory instrumented with a sweep- and a fixed-frequency ionosonde, a VLF receiver, energetic and soft particle detectors, an ion mass spectrometer, an electrostatic probe, a retarding potential analyzer, a beacon transmitter, a cosmic noise experiment, and two photometers. Two long crossed-dipole antennas (73 and 18.7 m) were used for the sounding, VLF, and cosmic noise experiments.The spacecraft was spin-stabilized to about 2 rpm after antenna deployment. There were two basic orientation modes for the spacecraft, cartwheel and orbit-aligned. The spacecraft operated approximately the same length of time in each mode, remaining in one mode typically 3 to 5 months. The cartwheel mode with the axis perpendicular to the orbit plane was made available to provide ram and wake data for some experiments for each spin period, rather than for each orbit period. Attitude and spin information was obtained from a three-axis magnetometer and a sun sensor. Control of attitude and spin was possible by means of magnetic torquing.The experiment package also included a programmable tape recorder with a one hour capacity. For non-recorded observations, data from satellite and subsatellite regions were telemetered when the spacecraft was in the line of sight of a telemetry station. Telemetry stations were located so that primary data coverage was near the 80-deg-W meridian and near Hawaii, Singapore, Australia, England, France, Norway, India, Japan, Antarctica, New Zealand, and Central Africa. NASA support of the ISIS project was terminated on October 1, 1979. A significant amount of experimental data, however, was acquired after this date by the Canadian project team. ISIS 2 operations were terminated in Canada on March 9, 1984. The Radio Research Laboratories (Tokyo, Japan) then requested and received permission to reactivate ISIS 2. Regular ISIS 2 operations were started from Kashima, Japan, in early August 1984. ISIS 2 was deactivated effective 24, 1990. A data restoration effort began in the late 1990s and successfully saved a considerable portion of the high-resolution data before the telemetry tapes were discarted.The data set was generated from the averaged ionogram binary data (SPIO-00318) recorded by the Topside Sounder. The data are obtained with the TOPIST program, which analyzes the data, automatically scales the ionogram traces and resonances, and inverts the traces into an electron density profile. The same program is available for use to hand-scale the data if desired. Output data items include spacecraft position, electron density profile, assessment of quality, resonance and cut-off frequencies, and both the O-trace and X-trace. <_Description>Source: Master/CDFglobalAttributes/TEXT <_Rights> SPDX Creative Commons Zero v1.0 Universal https://spdx.org/licenses/CC0-1.0.html https://spdx.org/licenses/ https://cdaweb.gsfc.nasa.gov/ISIS_ALOUETTE_DOCS/I2_NEPROF_TOPS_full_listing.txt (shows data availability) ISIS2 full listing <_Note>URL also in all.xml. Using master. TOPIST scaled ionogram traces and electron density profiles <_DOI>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/DOI.json <_AccessInformation>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/AccessInformation.json 1971-11-11T18:18:40Z 1984-01-04T05:15:38Z <_TemporalDescription>Generated from all.xml/@timerange_start and all.xml/@timerange_stop PT1M7S <_Cadence>Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/isis/topist_ne_profile_cdf/isis2/1971/i2_neprof_topist_19711111_v01.cdf. The most common cadence, 67000 [ms] = PT1M7S, occurred for 25.0000% of the 3 timesteps. <_ObservedRegion>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/ObservedRegion.json <_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 spase://SMWG/Instrument/ISIS2/SFS Profile spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: X. Huang and B. Reinisch at University of MassachusettsLowell HTTPS from SPDF https://cdaweb.gsfc.nasa.gov/pub/data/isis/topside_sounder/topist_ne_profile_cdf/isis2 In CDF via HTTP from CDAWeb i2_neprof_topist_%Y%m%d_%Q.cdf %Y I2_NEPROF_TOPIST CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: X. Huang and B. Reinisch at University of MassachusettsLowell FTPS from SPDF ftps://cdaweb.gsfc.nasa.gov/pub/data/isis/topside_sounder/topist_ne_profile_cdf/isis2 In CDF via HTTP from CDAWeb i2_neprof_topist_%Y%m%d_%Q.cdf %Y I2_NEPROF_TOPIST CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: X. Huang and B. Reinisch at University of MassachusettsLowell CDAWeb Web Service https://cdaweb.gsfc.nasa.gov/WebServices/ 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. I2_NEPROF_TOPIST CDF CSV GIF NetCDF PNG PS PDF XML x_Script.IDL x_Script.Python Text.ASCII x_WAV spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: X. Huang and B. Reinisch at University of MassachusettsLowell CDAWeb Web Service user interface https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?index=sp_phys&dataset=I2_NEPROF_TOPIST I2_NEPROF_TOPIST Web service user interface for this product. CDF GIF PDF Text.ASCII x_WAV spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: X. Huang and B. Reinisch at University of MassachusettsLowell CDAWeb Python Script https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/I2_NEPROF_TOPIST/clientLibraryExample/ I2_NEPROF_TOPIST Web service that generates a Python script to access this product. x_Script.IDL x_Script.Python spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/SSCWeb. Please also acknowledge the data producer: X. Huang and B. Reinisch at University of MassachusettsLowell 4D Orbit Viewer https://sscweb.gsfc.nasa.gov/4dorbit/?sc=I2_NEPROF_TOPIST I2_NEPROF_TOPIST Web Service to this product. HTML spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb and the HAPI project. Please also acknowledge the data producer: X. Huang and B. Reinisch at University of MassachusettsLowell CDAWeb HAPI Server https://hapi-server.org/servers/#server=CDAWeb&dataset=I2_NEPROF_TOPIST I2_NEPROF_TOPIST Web Service to this product using the HAPI interface. CSV JSON Binary spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb and the HAPI project. Please also acknowledge the data producer: X. Huang and B. Reinisch at University of MassachusettsLowell CDAWeb HAPI Script in Multiple Languages https://hapi-server.org/servers/#server=CDAWeb&dataset=I2_NEPROF_TOPIST&return=script I2_NEPROF_TOPIST 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. x_Script.IDL x_Script.Javascript x_Script.MATLAB x_Script.Python x_Script.Autoplot x_Script.curl x_Script.wget spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb and the HAPI project. Please also acknowledge the data producer: X. Huang and B. Reinisch at University of MassachusettsLowell HAPI visualizations https://hapi-server.org/plot/?server=https://cdaweb.gsfc.nasa.gov/hapi&dataset=I2_NEPROF_TOPIST&format=gallery I2_NEPROF_TOPIST Web Service that generates plots. See https://hapi-server.org/plot/ for the API. PNG PDF SVG International Satellite for Ionosphere Studies 1 (from all.xml/observatory/description/@short) Generated by TOPIST program, quality flags 2 and 3 (from all.xml/instrument/description/@short) Space Physics (from Master/CDFglobalAttributes/Discipline) Ionospheric Science (from Master/CDFglobalAttributes/Discipline) ISIS-2 (from Master/CDFglobalAttributes/Source_name) International Satellite for Ionosphere Studies 1 (from Master/CDFglobalAttributes/Source_name) NEPROF (from Master/CDFglobalAttributes/Data_type) Density Profiles (from Master/CDFglobalAttributes/Data_type) TOPIST (from all.xml/instrument/@ID) Earth.NearSurface.Ionosphere Earth.Magnetosphere Earth.NearSurface.AuroralRegion Earth.NearSurface.EquatorialRegion Earth.NearSurface.Ionosphere.Topside Earth.Magnetosphere.Polar Earth.NearSurface.PolarCap Earth.NearSurface Time Epoch CATDESC: 'Time'. 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.' ms Scalar Temporal ut ut Master CDF CATDESC: 'ut'. Master CDF VAR_NOTES: ' mjd.time mjd - Modified Julian Date JULDAY(Month, Day, Year)-2400001L time - time converted to fraction of day (12h = 0.5d) 1.1.1990 12h : ut=47892.5d0)'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 Electron density ni Master CDF CATDESC: 'Topside electron density along orbit in cm-3 (Image)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' cm-3 -1e+31 1000 log(Ne/cm-3) niLog10 Master CDF CATDESC: 'Log10 of Topside electron density along orbit in cm-3 (Image)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 1000 altitude hi Master CDF CATDESC: 'altitude on profile'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' km -1e+31 1000 Satellite altitude alt Master CDF CATDESC: 'Satellite 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.' km -1e+31 Longitude lon Master CDF CATDESC: 'Longitude in degree (0 to 360)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' deg -1e+31 Latitude lat Master CDF CATDESC: 'Latitude in degree (-90 to +90)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' deg -1e+31 MLT mlt Master CDF CATDESC: 'Magnetic Local Time (MLT) in hours'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' h -1e+31 SZA sza Master CDF CATDESC: 'Solar zenith angle in degree'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' deg -1e+31 L shell L Master CDF CATDESC: 'McIlwain L parameter'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 Invariant Lat ilat Master CDF CATDESC: 'Invariant Latitude in degree'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' deg -1e+31 Dip Latitude diplat Master CDF CATDESC: 'Dip Latitude in degree'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' deg -1e+31 Invdip invdip Master CDF CATDESC: 'Invdip - A new coordinate that combines Invariant Latitude and Dip Latitude'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' deg -1e+31 Mag Latitude mlat Master CDF CATDESC: 'Magnetic Latitude in degree'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' deg -1e+31 Mag Longitude mlon Master CDF CATDESC: 'Magnetic Longitude (0-360) in degree'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' deg -1e+31