<_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/helios1_40sec_mag-plasma_00000000_v01.json (from all.xml) spase://NASA/NumericalData/Helios1/E1/PT40.5S <_ResourceID>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/ResourceID.json Merged 40.5 s magnetic field, plasma data, ephemeris <_ResourceName>Source: Master/CDFglobalAttributes/Logical_source_description helios1_40sec_mag-plasma <_AlternateName>Source: Master/CDFglobalAttributes/Logical_source General information about initial ascii files: This subdirectory contains daily files of 40.5 sec Helios magnetic field and plasma data described below. It also contains a file of software written by Aaron Roberts, readhelios40s_dat.pro, for creating alfvenicity graphs. The Helios mission consisted of two spacecraft launched into the inner heliosphere, both executing orbits from 0.3 to 1 AU with roughly a six month orbital period. Magnetic field data were recorded at high resolution, with plasma data recorded at approximately 40.5 s resolution. These datasets give the highest resolution plasma (proton and helium) moments with the corresponding average magnetic field for each plasma measurement. There are results from two plasma sensors, one of which gives the vector velocity. The coverage is best in the early years and varies considerably for the rest of the mission. The files Helios1_stats and Helios2_stats give the year, day of year, number of points, and percentage of possible points for the days included in the sets. There is no coverage for many days, with the main reason being that the spacecraft pass behind the Sun with respect to the Earth, thus cutting off communication. The overall intervals covered are: Helios 1: 1974 day 346 to 1985 day 247 Helios 2: 1976 day 017 to 1980 day 068 The present set of files were produced by R. Schwenn and obtained from J. Luhmann. They have been reformatted by Aaron Roberts to assure spaces between the variables, and in the process the HGI longitude and the RTN versions of the variables were added for convenience. Also, spacecraft positions were interpolated to make them distinct. The fill value for missing data in the original files was either -1 or 0; all these have been changed to 0. The other entries are directly from the original files. R. Schwenn should be acknowledged for plasma data and F. Neubauer for magnetic field data. GSFC/SPDF nssdcftp (or successor) should be acknowledged as the immediate source of the data. * The RTN components were calculated from the SSE XYZ components using R -> -X, T -> -Y, and N -> Z. The Cartesian coordinates for B and the angles for V are the original variables in the file, and no correction was made in the conversion to RTN for the actual spacecraft position. Since RTN and SSE are defined relative to the helioequatorial plane and to the ecliptic plane, respectively, and since these planes are inclined by 7.25 degrees relative to each other (heliocentric orbits of Earth, Helios 1 and Helios 2 are virtually co-planar), this introduces errors of up to 100% * (1 - cos 7.25) = 1% in the RTN components. However, the V and B are consistent with each other and can be compared directly. (text by Aaron Roberts, with edits by Joe King; October, 2008) <_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://spdf.gsfc.nasa.gov/pub/data/helios/helios1/merged/he1_40sec/ ASCII files Above data in the form of <_Note>URL also in all.xml. Using master. <_DOI>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/DOI.json <_AccessInformation>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/AccessInformation.json 1974-12-12T01:21:38Z 1985-09-04T09:52:10Z <_TemporalDescription>Generated from all.xml/@timerange_start and all.xml/@timerange_stop PT41S <_Cadence>Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/helios/helios1/merged/mag_plasma/40sec_cdf/1974/helios1_40sec_mag-plasma_19741212_v01.cdf. The most common cadence, 41000 [ms] = PT41S, occurred for 47.7011% of the 664 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/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: R. Schwenn, F. M. Neubauer at Max Planck Institute for Solar System Research, University of Cologne HTTPS from SPDF https://cdaweb.gsfc.nasa.gov/pub/data/helios/helios1/merged/mag_plasma/40sec_cdf In CDF via HTTP from CDAWeb helios1_40sec_mag-plasma_%Y%m%d_%Q.cdf %Y HELIOS1_40SEC_MAG-PLASMA CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: R. Schwenn, F. M. Neubauer at Max Planck Institute for Solar System Research, University of Cologne FTPS from SPDF ftps://cdaweb.gsfc.nasa.gov/pub/data/helios/helios1/merged/mag_plasma/40sec_cdf In CDF via HTTP from CDAWeb helios1_40sec_mag-plasma_%Y%m%d_%Q.cdf %Y HELIOS1_40SEC_MAG-PLASMA CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: R. Schwenn, F. M. Neubauer at Max Planck Institute for Solar System Research, University of Cologne 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. HELIOS1_40SEC_MAG-PLASMA 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: R. Schwenn, F. M. Neubauer at Max Planck Institute for Solar System Research, University of Cologne CDAWeb Web Service user interface https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?index=sp_phys&dataset=HELIOS1_40SEC_MAG-PLASMA HELIOS1_40SEC_MAG-PLASMA 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: R. Schwenn, F. M. Neubauer at Max Planck Institute for Solar System Research, University of Cologne CDAWeb Python Script https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/HELIOS1_40SEC_MAG-PLASMA/clientLibraryExample/ HELIOS1_40SEC_MAG-PLASMA 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: R. Schwenn, F. M. Neubauer at Max Planck Institute for Solar System Research, University of Cologne 4D Orbit Viewer https://sscweb.gsfc.nasa.gov/4dorbit/?sc=HELIOS1_40SEC_MAG-PLASMA HELIOS1_40SEC_MAG-PLASMA 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: R. Schwenn, F. M. Neubauer at Max Planck Institute for Solar System Research, University of Cologne CDAWeb HAPI Server https://hapi-server.org/servers/#server=CDAWeb&dataset=HELIOS1_40SEC_MAG-PLASMA HELIOS1_40SEC_MAG-PLASMA 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: R. Schwenn, F. M. Neubauer at Max Planck Institute for Solar System Research, University of Cologne CDAWeb HAPI Script in Multiple Languages https://hapi-server.org/servers/#server=CDAWeb&dataset=HELIOS1_40SEC_MAG-PLASMA&return=script HELIOS1_40SEC_MAG-PLASMA 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: R. Schwenn, F. M. Neubauer at Max Planck Institute for Solar System Research, University of Cologne HAPI visualizations https://hapi-server.org/plot/?server=https://cdaweb.gsfc.nasa.gov/hapi&dataset=HELIOS1_40SEC_MAG-PLASMA&format=gallery HELIOS1_40SEC_MAG-PLASMA Web Service that generates plots. See https://hapi-server.org/plot/ for the API. PNG PDF SVG Helios-1 (from all.xml/observatory/description/@short) Merged magnetic field, plasma, trajectory (from all.xml/instrument/description/@short) Space Physics (from Master/CDFglobalAttributes/Discipline) Interplanetary Studies (from Master/CDFglobalAttributes/Discipline) HELIOS-1 (from Master/CDFglobalAttributes/Source_name) Helios-1 (from Master/CDFglobalAttributes/Source_name) 40sec (from Master/CDFglobalAttributes/Data_type) 40 sec Helios magnetic field and plasma data (from Master/CDFglobalAttributes/Data_type) mag-plasma (from all.xml/instrument/@ID) Heliosphere.Inner Heliosphere.NearEarth Heliosphere spase://SMWG/Instrument/Helios1/E1 spase://SMWG/Instrument/Helios1/E3 MagneticField ThermalPlasma Epoch Epoch CATDESC: 'Default 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 R_Helio R_Helio Master CDF CATDESC: 'Heliocentric distance (AU)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' AU -1e+31 ESS_Ang ESS_Ang Master CDF CATDESC: 'Earth-sun-spacecraft angle (deg)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' degree -1e+31 C long clong Master CDF CATDESC: 'Carrington longitude (deg)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' degree -1e+31 C/HGI lat clat Master CDF CATDESC: 'Carrington/HGI latitude (deg)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' degree -1e+31 HGI Long HGIlong Master CDF CATDESC: 'HGI Longitude (deg)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' degree -1e+31 B_R B_R Master CDF CATDESC: 'The HGI "R" component of the magnetic field (nT)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 B_T B_T Master CDF CATDESC: 'The HGI "T" component of the magnetic field (nT)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 B_N B_N Master CDF CATDESC: 'The HGI "N" component of the magnetic field (nT)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 Vp_R Vp_R Master CDF CATDESC: 'The HGI "R" component of the proton velocity (km/s)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' km/s -1e+31 Vp_T Vp_T Master CDF CATDESC: 'The HGI "T" component of the proton velocity (km/s)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' km/s -1e+31 Vp_N Vp_N Master CDF CATDESC: 'The HGI "N" component of the proton velocity (km/s)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' km/s -1e+31 Carrington rotation crot Master CDF CATDESC: 'Carrington rotation'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 N_p Np Master CDF CATDESC: 'Proton number density (cm^-3)'. 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 V_p Vp Master CDF CATDESC: 'Proton speed (Km/s)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' km/s -1e+31 T_p Tp Master CDF CATDESC: 'Proton Temperature (K)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' K -1e+31 V_Azimuth V_Azimuth Master CDF CATDESC: 'Azimuth of the velocity vector (deg)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' degree -1e+31 V_Elev V_Elev Master CDF CATDESC: 'Elevation of the velocity vector (deg)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' degree -1e+31 Bx_SSE B_x Master CDF CATDESC: 'SSE (spacecraft) X component of the magnetic field'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 By_SSE B_y Master CDF CATDESC: 'SSE (spacecraft) Y component of the magnetic field'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 Bz_SSE B_z Master CDF CATDESC: 'SSE (spacecraft) Z component of the magnetic field'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 stdev Bx_SSE stdev_B_x Master CDF CATDESC: 'Standard deviation of the B_X component over the 40.5 s'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 stdev By_SSE stdev_B_y Master CDF CATDESC: 'Standard deviation of the B_Y component over the 40.5 s'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 stdev Bz_SSE stdev_B_z Master CDF CATDESC: 'Standard deviation of the B_Z component over the 40.5 s'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 N_a N_a Master CDF CATDESC: 'Alpha number density (cm^-3)'. 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 V_a V_a Master CDF CATDESC: 'Alpha speed (Km/s)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' km/s -1e+31 T_a T_a Master CDF CATDESC: 'Alpha temperature (K)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' K -1e+31 N_p2 Np2 Master CDF CATDESC: 'Proton density (second instrument)'. 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 V_p2 Vp2 Master CDF CATDESC: 'Proton speed (second instrument)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' km/s -1e+31