<_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/se_k0_ais_00000000_v01.json (from all.xml) spase://NASA/NumericalData/SESAME/KeyParameters/AIS/PT900S <_ResourceID>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/ResourceID.json SESAME Advanced Ionospheric Sounder, Key Parameters <_ResourceName>Source: Master/CDFglobalAttributes/Logical_source_description SE_K0_AIS <_AlternateName>Source: Master/CDFglobalAttributes/Logical_source Ionospheric parameters derived from quarter-hourly ionogramsRef: Grubb,RN The NOAA SEL HF Radar system (ionospheric sounder) NOAA Tech Memo ERL SEL-55, Space Environ Lab, Boulder, CO, 1979Ref: Jarvis,MJ & Dudeney ,JR Reduction of ambiguities in HF radar resultsthrough a revised receiving array & sounding pattern. Radio Sci 21, 151-158, 1986Ref: Satellite Experiments Simultaneous with Antarctic Measurements (SESAME), in GGS Instrument Papers, submitted to Space Science ReviewsInfo:Keith Morrison,GGS Scientist,British Antarctic Survey,Cambridge,CB3 0ET,UKE-mail: 19989::MORRISONQUALITY_FLAG Comprised of several additive values each with a specific meaning:-0 okay,+1 <6 echoes used for fmin,+2 <6 echoes for fEmax,+4 <6 echoes for fFmax,+8 fmin approx= min tx frequency,+16 fEmax approx= max tx frequency,+32 fFmax approx= max tx frequency (tx=transmitter)eg 37 indicates <6 echoes used for fmin & fFmax, & fFmax approx= max tx freq <_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/ Advanced Ionospheric Sounder Key Parameters, Halley, Antarctica <_DOI>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/DOI.json <_AccessInformation>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/AccessInformation.json 1992-09-01T00:00:21Z 2001-10-17T23:45:00Z <_TemporalDescription>Generated from all.xml/@timerange_start and all.xml/@timerange_stop PT15M <_Cadence>Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/sesame/ais/1992/se_k0_ais_19920901_v01.cdf. The most common cadence, 900000 [ms] = PT15M, occurred for 98.9247% of the 92 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/SESAME/AIS ThermalPlasma spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: J. Dudeney at British Antarctic Survey HTTPS from SPDF https://cdaweb.gsfc.nasa.gov/pub/data/sesame/ais In CDF via HTTP from CDAWeb se_k0_ais_%Y%m%d_%Q.cdf %Y SE_K0_AIS CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: J. Dudeney at British Antarctic Survey FTPS from SPDF ftps://cdaweb.gsfc.nasa.gov/pub/data/sesame/ais In CDF via HTTP from CDAWeb se_k0_ais_%Y%m%d_%Q.cdf %Y SE_K0_AIS CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: J. Dudeney at British Antarctic Survey 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. SE_K0_AIS 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: J. Dudeney at British Antarctic Survey CDAWeb Web Service user interface https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?index=sp_phys&dataset=SE_K0_AIS SE_K0_AIS 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: J. Dudeney at British Antarctic Survey CDAWeb Python Script https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/SE_K0_AIS/clientLibraryExample/ SE_K0_AIS 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: J. Dudeney at British Antarctic Survey 4D Orbit Viewer https://sscweb.gsfc.nasa.gov/4dorbit/?sc=SE_K0_AIS SE_K0_AIS 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: J. Dudeney at British Antarctic Survey CDAWeb HAPI Server https://hapi-server.org/servers/#server=CDAWeb&dataset=SE_K0_AIS SE_K0_AIS 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: J. Dudeney at British Antarctic Survey CDAWeb HAPI Script in Multiple Languages https://hapi-server.org/servers/#server=CDAWeb&dataset=SE_K0_AIS&return=script SE_K0_AIS 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: J. Dudeney at British Antarctic Survey HAPI visualizations https://hapi-server.org/plot/?server=https://cdaweb.gsfc.nasa.gov/hapi&dataset=SE_K0_AIS&format=gallery SE_K0_AIS Web Service that generates plots. See https://hapi-server.org/plot/ for the API. PNG PDF SVG Satellite Experiments Simultaneous with Antarctic Measurements (from all.xml/observatory/description/@short) Advanced Ionospheric Sounder (from all.xml/instrument/description/@short) AIS (from all.xml/instrument/@ID) Earth.Magnetosphere Earth.NearSurface.Ionosphere Time of observation Epoch CATDESC: 'Mid-time of observation to nearest second'. 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 Time of observation Time_PB5 Master CDF CATDESC: 'Mid-time of observation to nearest second'. Master CDF VAR_NOTES: ' '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -2147483648 3 year day msec 1/2 duration of observation half_duration Master CDF CATDESC: 'Epoch and Time_PB5 correspond to mid-time of observation'. Master CDF VAR_NOTES: ' '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' ms -1e+31 Lowest plasma frequency fmin Master CDF CATDESC: 'Lowest plasma frequency (-88.88=Insuf. echoes,-99.99=no echoes)'. Master CDF VAR_NOTES: '(-88.88=Insuff. echoes,-99.99=no echoes present)'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' MHz -1e+31 Max E-region plasma frequency fEmax Master CDF CATDESC: 'Max E-region plasma frequency (-88.88=Insuf. echoes,-99.99=no echoes)'. Master CDF VAR_NOTES: 'Virtual height approx<200km. -88.88=Insufficient echoes,-99.99=no echoes present'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' MHz -1e+31 Max F-region plasma frequency fFmax Master CDF CATDESC: 'Max F-region plasma frequency (-88.88=Insuf. echoes,-99.99=no echoes)'. Master CDF VAR_NOTES: 'Virtual height approx>200km. -88.88=Insufficient echoes,-99.99=no echoes present'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' MHz -1e+31 Data quality flag quality_flag Master CDF CATDESC: 'Comprised of several additive values - see description in TEXT'. Master CDF VAR_NOTES: ' '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -32768 feature flag feature_flag Master CDF CATDESC: '0-okay, 1-blackout 2-spread-F'. Master CDF VAR_NOTES: ' '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -128 post gap flag post_gap Master CDF CATDESC: 'Indicates gap: 0-no gap, 1-not recording (gap = no data for > 17min)'. Master CDF VAR_NOTES: ' '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -128