<_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/psp_swp_spc_l3i_00000000_v01.json (from all.xml) spase://NASA/NumericalData/ParkerSolarProbe/SWEAP/SPC/Level3/SolarWindMomentsFits/PT0.2185S <_ResourceID>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/ResourceID.json Parker Solar Probe/SWEAP/SPC level 3 ion data <_ResourceName>Source: Master/CDFglobalAttributes/Logical_source_description psp_swp_spc_l3i <_AlternateName>Source: Master/CDFglobalAttributes/Logical_source This file includes the densities, vector velocities, and scalar (radial component) temperatures of the solar wind protons measured by the Solar Probe Cup (SPC). These are determined both by a direct computation of the velocity moments of the reduced distribution function and by attempting to fit the primary peak in the ion I(V) curve with a Maxwellian model.When such fitting is successful, the data set also includes Maxwellian model fits to the alpha-particle (He++) and tertiary (usually proton beam or shoulder) populations. <_Description>Source: Master/CDFglobalAttributes/TEXT This project acknowledges the Parker Solar Probe SWEAP instrument team and the SWEAP science data center for providing these solar wind plasma measurements. <_Acknowledgement>Source: Master/CDFglobalAttributes/Acknowledgement <_Rights> SPDX Creative Commons Zero v1.0 Universal https://spdx.org/licenses/CC0-1.0.html https://spdx.org/licenses/ https://link.springer.com/article/10.1007/s11214-015-0206-3 Space Science Reviews SWEAP instrument paper at <_Note>URL also in all.xml. Using master. PSP SWEAP Data Access web site, SAO http://sweap.cfa.harvard.edu/Data.html Parker Solar Probe, PSP, SWEAP Data Access web site, Smithsonian Astrophysical Observatory <_Note>URL also in all.xml, master. Using InformationURL.json. PSP SWEAP Instrument Suite, Space Science Review Publication https://doi.org/10.1007/s11214-015-0206-3 Parker Solar Probe, PSP, SWEAP Instrument Suite Description: Kasper, J.C., Abiad, R., Austin, G. et al., Solar Wind Electrons Alphas and Protons (SWEAP) Investigation: Design of the Solar Wind and Coronal Plasma Instrument Suite for Solar Probe Plus, Space Scii. Rev., 204, 131–186 (2016) <_Note>Source: InformationURL.json PSP SWEAP home page, SAO http://sweap.cfa.harvard.edu Parker Solar Probe, PSP, SWEAP home page, Smithsonian Astrophysical Observatory <_Note>Source: InformationURL.json NASA open data policy applies. Consultation with the instrument team is strongly recommended. <_Caveats>Source: Master/CDFglobalAttributes/Rules_of_use https://doi.org/10.48322/49we-tr31 <_DOI>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/DOI.json <_AccessInformation>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/AccessInformation.json 2018-10-30T23:59:59Z 2025-11-30T09:50:48Z <_TemporalDescription>Generated from all.xml/@timerange_start and all.xml/@timerange_stop PT0.87382S <_Cadence>Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/psp/sweap/spc/l3/l3i/2018/psp_swp_spc_l3i_20181031_v01.cdf. The most common cadence, 873820032 [ns] = PT0.87382S, occurred for 34.1889% of the 31835 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: Michael L. Stevens at Center for Astrophysics, Harvard and Smithsonian HTTPS from SPDF https://cdaweb.gsfc.nasa.gov/pub/data/psp/sweap/spc/l3/l3i In CDF via HTTP from CDAWeb psp_swp_spc_l3i_%Y%m%d_%Q.cdf %Y PSP_SWP_SPC_L3I CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: Michael L. Stevens at Center for Astrophysics, Harvard and Smithsonian FTPS from SPDF ftps://cdaweb.gsfc.nasa.gov/pub/data/psp/sweap/spc/l3/l3i In CDF via HTTP from CDAWeb psp_swp_spc_l3i_%Y%m%d_%Q.cdf %Y PSP_SWP_SPC_L3I CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: Michael L. Stevens at Center for Astrophysics, Harvard and Smithsonian 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. PSP_SWP_SPC_L3I 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: Michael L. Stevens at Center for Astrophysics, Harvard and Smithsonian CDAWeb Web Service user interface https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?index=sp_phys&dataset=PSP_SWP_SPC_L3I PSP_SWP_SPC_L3I 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: Michael L. Stevens at Center for Astrophysics, Harvard and Smithsonian CDAWeb Python Script https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/PSP_SWP_SPC_L3I/clientLibraryExample/ PSP_SWP_SPC_L3I 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: Michael L. Stevens at Center for Astrophysics, Harvard and Smithsonian 4D Orbit Viewer https://sscweb.gsfc.nasa.gov/4dorbit/?sc=PSP_SWP_SPC_L3I PSP_SWP_SPC_L3I 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: Michael L. Stevens at Center for Astrophysics, Harvard and Smithsonian CDAWeb HAPI Server https://hapi-server.org/servers/#server=CDAWeb&dataset=PSP_SWP_SPC_L3I PSP_SWP_SPC_L3I 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: Michael L. Stevens at Center for Astrophysics, Harvard and Smithsonian CDAWeb HAPI Script in Multiple Languages https://hapi-server.org/servers/#server=CDAWeb&dataset=PSP_SWP_SPC_L3I&return=script PSP_SWP_SPC_L3I 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: Michael L. Stevens at Center for Astrophysics, Harvard and Smithsonian HAPI visualizations https://hapi-server.org/plot/?server=https://cdaweb.gsfc.nasa.gov/hapi&dataset=PSP_SWP_SPC_L3I&format=gallery PSP_SWP_SPC_L3I Web Service that generates plots. See https://hapi-server.org/plot/ for the API. PNG PDF SVG Parker Solar Probe (from all.xml/observatory/description/@short) Solar Wind Electrons Alphas and Protons / Solar Probe Cup (from all.xml/instrument/description/@short) Solar Physics (from Master/CDFglobalAttributes/Discipline) Heliospheric Physics (from Master/CDFglobalAttributes/Discipline) Space Physics (from Master/CDFglobalAttributes/Discipline) Interplanetary Studies (from Master/CDFglobalAttributes/Discipline) PSP (from Master/CDFglobalAttributes/Source_name) Parker Solar Probe (from Master/CDFglobalAttributes/Source_name) L3i (from Master/CDFglobalAttributes/Data_type) Solar Wind Ion velocity moments and fits (from Master/CDFglobalAttributes/Data_type) SWP_SPC (from all.xml/instrument/@ID) Heliosphere Heliosphere.Inner Heliosphere.NearEarth Sun.Corona spase://SMWG/Instrument/ParkerSolarProbe/Ephemeris spase://SMWG/Instrument/ParkerSolarProbe/SWEAP/SPC Ephemeris ThermalPlasma Epoch Epoch CATDESC: 'CDF TT2000 time [ns]'. 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.' ns Scalar Temporal Data quality flag DQF Master CDF CATDESC: 'Array of SPC data quality indicators.'. Master CDF VAR_NOTES: 'The indication of the 32 elements of the data quality array is given by the metadata variable 'DQF_flagnames'. All flags are encoded as follows: --------- --------------- = 0, good/nominal/condition not present/etc > 1, bad/problematic/condition present/etc = -1, status not determined ("don't know") < -1, status does not matter ("don't care") -1 ("don't know") is the default value for all flags. The 0th flag array element is the [standardized] global quality flag, signifying whether the data are suitable for use without caveate. It is repeated in the "general_flag" variable.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1=unknown 0=good 1=bad -128 32 general_flag general_flag Master CDF CATDESC: 'Global quality flag, signifying whether the data for this epoch are suitable for use without caveate.'. Master CDF VAR_NOTES: 'All flags are encoded as follows: -------------------------- = 0, good/nominal/condition not present/etc > 1, bad/problematic/condition present/etc = -1, status not determined ("don't know") < -1, status does not matter ("don't care") -1 ("don't know") is the default value for all flags. The user is advised to consider the quoted measurement uncertainties, particularly when the general quality flag is zero. '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' 0 = good -128 proton bulk velocity moment in spacecraft frame vp_moment_SC_gd Master CDF CATDESC: 'Proton bulk velocity from the 1st moment of the reduced distribution function, in the spacecraft frame (Only Good Quality)'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton bulk speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s proton bulk velocity moment upper uncertainty in the spacecraft frame vp_moment_SC_deltahigh_gd Master CDF CATDESC: '---> upper uncertainty'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton most-probable thermal speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s proton bulk velocity moment lower uncertainty in the spacecraft frame vp_moment_SC_deltalow_gd Master CDF CATDESC: '---> lower uncertainty'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton most-probable thermal speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s proton bulk velocity moment in RTN frame vp_moment_RTN_gd Master CDF CATDESC: 'Proton bulk velocity from the 1st moment of the reduced distribution function in [inertial] RTN coordinate system (Only Good Quality)'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton bulk speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s proton bulk velocity moment upper uncertainty in the RTN frame vp_moment_RTN_deltahigh_gd Master CDF CATDESC: '---> upper uncertainty'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton most-probable thermal speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s proton bulk velocity moment lower uncertainty in the RTN frame vp_moment_RTN_deltalow_gd Master CDF CATDESC: '---> lower uncertainty'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton most-probable thermal speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s proton bulk density moment np_moment_gd Master CDF CATDESC: 'Proton density estimate from the 0th moment of the reduced distribution function (Only Good Quality)'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton density, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Q) cm^{-3} -1e+31 proton bulk density moment, upper uncertainty np_moment_deltahigh_gd Master CDF CATDESC: '---> upper uncertainty'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton density, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) cm^{-3} -1e+31 proton bulk density moment, lower uncertainty np_moment_deltalow_gd Master CDF CATDESC: '---> lower uncertainty'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton density, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) cm^{-3} -1e+31 proton bulk thermal speed moment wp_moment_gd Master CDF CATDESC: 'Proton radial [most probable] thermal speed estimate from the 2nd velocity moment of the reduced distribution function (Only Good Quality)'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton most-probable thermal speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) km/s -1e+31 proton bulk thermal speed moment, upper uncertainty wp_moment_deltahigh_gd Master CDF CATDESC: '---> upper uncertainty'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton most-probable thermal speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) km/s -1e+31 proton bulk thermal speed moment, lower uncertainty wp_moment_deltalow_gd Master CDF CATDESC: '---> lower uncertainty'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton most-probable thermal speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) km/s -1e+31 Primary proton velocity in spacecraft frame vp1_fit_SC_gd Master CDF CATDESC: 'Primary proton population velocity, from 1-dimensional Maxwellian fitting, in the spacecraft frame (Only Good Quality)'. Master CDF VAR_NOTES: 'The strongest signal peak, which generally corresponds to the bulk proton population in the solar wind, is fit to a convected Maxwellian model. '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s Primary proton velocity uncertainty in spacecraft frame vp1_fit_SC_uncertainty_gd Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. The flow angles relative to the SPC are obtained by comparing fluxes upon the four sensor quadrants. This uncertainty incorporates uncertainties in the absolute responses of the respective sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s Primary proton velocity in RTN frame vp1_fit_RTN_gd Master CDF CATDESC: 'Primary proton population velocity, from 1-dimensional Maxwellian fitting, in the [inertial] RTN frame (Only Good Quality)'. Master CDF VAR_NOTES: 'The strongest signal peak, which generally corresponds to the bulk proton population in the solar wind, is fit to a convected Maxwellian model. '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s Primary proton velocity uncertainty in RTN frame vp1_fit_RTN_uncertainty_gd Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. The flow angles relative to the SPC are obtained by comparing fluxes upon the four sensor quadrants. This uncertainty incorporates uncertainties in the absolute responses of the respective sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s Primary proton density np1_fit_gd Master CDF CATDESC: 'Primary proton population density, from 1-dimensional Maxwellian fitting. (Only Good Quality)'. Master CDF VAR_NOTES: 'The strongest signal peak, which generally corresponds to the bulk proton population in the solar wind, is fit to a convected Maxwellian model.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) cm^{-3} -1e+31 Primary proton density, fit uncertainty np1_fit_uncertainty_gd Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. This variable reflects *precision* uncertainty from fitting, summed in quadrature with the *accuracy* uncertainy associated with the absolute responses of the SPC sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) cm^{-3} -1e+31 Primary proton thermal speed wp1_fit_gd Master CDF CATDESC: 'Primary proton population radial [most probable] thermal speed, from 1-dimensional Maxwellian fitting. (Only Good Quality)'. Master CDF VAR_NOTES: 'The strongest signal peak, which generally corresponds to the bulk proton population in the solar wind, is fit to a convected Maxwellian model. This measurement most accurately represents the thermal width of the reduced phase-space-distribution function along the SPC-normal direction. This roughly corresponds to the radial component of the temperature tensor. This is a most probable thermal speed, i.e. the model distribution goes like exp(-v^2/w^2).'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) km/s -1e+31 Primary proton thermal speed, fit uncertainty wp1_fit_uncertainty_gd Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. This variable reflects *precision* uncertainty from fitting, summed in quadrature with the *accuracy* uncertainy associated with the absolute responses of the SPC sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) km/s -1e+31 Proton bulk velocity in the spacecraft frame vp_fit_SC_gd Master CDF CATDESC: 'Proton bulk velocity, from 1-dimensional Maxwellian fitting, in the spacecraft frame (Only Good Quality)'. Master CDF VAR_NOTES: 'the bulk proton population in the solar wind is fit to a group of convected Maxwellian models. '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s proton bulk velocity, fit uncertainty in the spacecraft frame vp_fit_SC_uncertainty_gd Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. The flow angles relative to the SPC are obtained by comparing fluxes upon the four sensor quadrants. This uncertainty incorporates uncertainties in the absolute responses of the respective sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s Proton bulk velocity in RTN frame vp_fit_RTN_gd Master CDF CATDESC: 'Proton bulk velocity, from 1-dimensional Maxwellian fitting, in the [inertial] RTN frame (Only Good Quality)'. Master CDF VAR_NOTES: 'the bulk proton population in the solar wind is fit to a group of convected Maxwellian models. '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s proton bulk velocity, fit uncertainty in RTN frame vp_fit_RTN_uncertainty_gd Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. The flow angles relative to the SPC are obtained by comparing fluxes upon the four sensor quadrants. This uncertainty incorporates uncertainties in the absolute responses of the respective sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s proton density np_fit_gd Master CDF CATDESC: '[Total] proton density, from 1-dimensional Maxwellian fitting. (Only Good Quality)'. Master CDF VAR_NOTES: 'the bulk proton population in the solar wind is fit to a group of convected Maxwellian models.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) cm^{-3} -1e+31 proton density, fit uncertainty np_fit_uncertainty_gd Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. This variable reflects *precision* uncertainty from fitting, summed in quadrature with the *accuracy* uncertainy associated with the absolute responses of the SPC sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' cm^{-3} -1e+31 Proton bulk thermal speed wp_fit_gd Master CDF CATDESC: 'Proton radial [most probable] thermal speed component, from 1-dimensional Maxwellian fitting. (Only Good Quality)'. Master CDF VAR_NOTES: 'the bulk proton population in the solar wind is fit to a group of convected Maxwellian models.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) km/s -1e+31 bulk proton thermal speed, fit uncertainty wp_fit_uncertainty_gd Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. This variable reflects *precision* uncertainty from fitting, summed in quadrature with the *accuracy* uncertainy associated with the absolute responses of the SPC sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) km/s -1e+31 alpha particle velocity in spacecraft frame va_fit_SC_gd Master CDF CATDESC: 'Alpha particle velocity vector, from 1-dimensional Maxwellian fitting, in the spacecraft frame (Only Good Quality)'. Master CDF VAR_NOTES: 'The alpha particle (He++) peak in the solar wind, when clearly distinguishable, is fit to a convected Maxwellian model. '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s alpha particle velocity fit uncertainty the spacecraft frame va_fit_SC_uncertainty_gd Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. The flow angles relative to the SPC are obtained by comparing fluxes upon the four sensor quadrants. This uncertainty incorporates uncertainties in the absolute responses of the respective sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s alpha particle velocity in RTN frame va_fit_RTN_gd Master CDF CATDESC: 'Alpha particle velocity vector, from 1-dimensional Maxwellian fitting, in the [inertial] RTN frame (Only Good Quality)'. Master CDF VAR_NOTES: 'The alpha particle (He++) peak in the solar wind, when clearly distinguishable, is fit to a convected Maxwellian model. '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s alpha particle velocity fit uncertainty in the RTN frame va_fit_RTN_uncertainty_gd Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. The flow angles relative to the SPC are obtained by comparing fluxes upon the four sensor quadrants. This uncertainty incorporates uncertainties in the absolute responses of the respective sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s alpha particle density na_fit_gd Master CDF CATDESC: 'Alpha particle density, from 1-dimensional Maxwellian fitting. (Only Good Quality)'. Master CDF VAR_NOTES: 'The alpha particle (He++) peak in the solar wind, when clearly distinguishable, is fit to a convected Maxwellian model.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) cm^{-3} -1e+31 alpha particle density fit uncertainty na_fit_uncertainty_gd Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. This variable reflects *precision* uncertainty from fitting, summed in quadrature with the *accuracy* uncertainy associated with the absolute responses of the SPC sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) cm^{-3} -1e+31 alpha particle thermal speed wa_fit_gd Master CDF CATDESC: 'Alpha particle radial [most probable] thermal speed, from 1-dimensional Maxwellian fitting. (Only Good Quality)'. Master CDF VAR_NOTES: 'The alpha particle (He++) peak in the solar wind, when clearly distinguishable, is fit to a convected Maxwellian model. This measurement most accurately represents the thermal width of the reduced phase-space-distribution function along the SPC-normal direction. This roughly corresponds to the radial component of the temperature tensor. This is a most probable thermal speed, i.e. the model distribution goes like exp(-v^2/w^2).'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) km/s -1e+31 alpha particle thermal speed fit uncertainty wa_fit_uncertainty_gd Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. This variable reflects *precision* uncertainty from fitting, summed in quadrature with the *accuracy* uncertainy associated with the absolute responses of the SPC sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) km/s -1e+31 population 3 velocity in spacecraft frame v3_fit_SC_gd Master CDF CATDESC: 'Population 3 velocity vector, from 1-dimensional Maxwellian fitting, in the spacecraft frame (Only Good Quality)'. Master CDF VAR_NOTES: 'The population 3 peak in the solar wind, when clearly distinguishable, is fit to a convected Maxwellian model. Population 3 most typically characterizes a proton shoulder or beam (mtoq=1)'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s population 3 velocity uncertainty in spacecraft frame v3_fit_SC_uncertainty_gd Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. The flow angles relative to the SPC are obtained by comparing fluxes upon the four sensor quadrants. This uncertainty incorporates uncertainties in the absolute responses of the respective sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s population 3 velocity in RTN frame v3_fit_RTN_gd Master CDF CATDESC: 'Population 3 velocity vector, from 1-dimensional Maxwellian fitting, in the [inertial] RTN frame (Only Good Quality)'. Master CDF VAR_NOTES: 'The population 3 peak in the solar wind, when clearly distinguishable, is fit to a convected Maxwellian model. Population 3 most typically characterizes a proton shoulder or beam (mtoq=1)'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s population 3 velocity uncertainty in RTN frame v3_fit_RTN_uncertainty_gd Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. The flow angles relative to the SPC are obtained by comparing fluxes upon the four sensor quadrants. This uncertainty incorporates uncertainties in the absolute responses of the respective sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (Good Q) km/s (Good Q) km/s (Good Q) km/s population 3 particle density n3_fit_gd Master CDF CATDESC: 'Population 3 particle density, from 1-dimensional Maxwellian fitting. (Only Good Quality)'. Master CDF VAR_NOTES: 'The population 3 particle peak in the solar wind, when clearly distinguishable, is fit to a convected Maxwellian model. Population 3 most typically characterizes a proton shoulder or beam (mtoq=1)'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) cm^{-3} -1e+31 population 3 density, fit uncertainty n3_fit_uncertainty_gd Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. This variable reflects *precision* uncertainty from fitting, summed in quadrature with the *accuracy* uncertainy associated with the absolute responses of the SPC sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) cm^{-3} -1e+31 population 3 thermal speed w3_fit_gd Master CDF CATDESC: 'Population 3 particle radial [most probable] thermal speed, from 1-dimensional Maxwellian fitting. (Only Good Quality)'. Master CDF VAR_NOTES: 'The population 3 peak in the solar wind, when clearly distinguishable, is fit to a convected Maxwellian model. Population 3 most typically characterizes a proton shoulder or beam (mtoq=1) This measurement most accurately represents the thermal width of the reduced phase-space-distribution function along the SPC-normal direction. This roughly corresponds to the radial component of the temperature tensor. This is a most probable thermal speed, i.e. the model distribution goes like exp(-v^2/w^2). '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) km/s -1e+31 population 3 thermal speed, fit uncertainty w3_fit_uncertainty_gd Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. This variable reflects *precision* uncertainty from fitting, summed in quadrature with the *accuracy* uncertainy associated with the absolute responses of the SPC sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) km/s -1e+31 population 3 mass-to-charge ratio pop3_mtoq_gd Master CDF CATDESC: 'Species identifier for third population fit (in addition to primary proton and alpha peaks) (Only Good Quality)'. Master CDF VAR_NOTES: 'When the n3_fit, w3_fit, and/or v3_fit variables are valid, they indicate that a third ion population has been measured in addition to the primary proton and alpha particle populations. This variable indicates the estimated mass-per-charge for that population, in fundamental units (i.e. protons=1/1=1, alphas=4/2=2, O6=16/6=2.67). Population 3 most typically characterizes a proton shoulder or beam (mtoq=1)'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (Good Qs) u/e -1e+31 Spacecraft position (HCI) sc_pos_HCI Master CDF CATDESC: 'PSP Spacecraft position in the Heliocentric Inertial system, in km'. Master CDF VAR_NOTES: 'Also called Ecliptic J2000. Z is the solar north rotational axis, and X is the solar ascending node on the J2000 ecliptic.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' km -1e+31 3 Spacecraft velocity vector (HCI) sc_vel_HCI Master CDF CATDESC: 'PSP Spacecraft velocity in the Heliocentric Inertial system, in km/s'. Master CDF VAR_NOTES: 'Also called Ecliptic J2000. Z is the solar north rotational axis, and X is the solar ascending node on the J2000 ecliptic.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' km/s -1e+31 3 carr_latitude carr_latitude Master CDF CATDESC: 'Carrington Latitude'. Master CDF VAR_NOTES: 'spacecraft position degrees Latitude from solar equator'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' degrees -1e+31 carr_longitude carr_longitude Master CDF CATDESC: 'Carrington Longitude'. Master CDF VAR_NOTES: 'spacecraft position degrees longitude from solar prime meridian'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' degrees -1e+31 proton bulk velocity moment in spacecraft frame vp_moment_SC Master CDF CATDESC: 'Proton bulk velocity from the 1st moment of the reduced distribution function, in the spacecraft frame (All Qualities)'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton bulk speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s proton bulk velocity moment upper uncertainty in the spacecraft frame vp_moment_SC_deltahigh Master CDF CATDESC: '---> upper uncertainty'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton most-probable thermal speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s proton bulk velocity moment lower uncertainty in the spacecraft frame vp_moment_SC_deltalow Master CDF CATDESC: '---> lower uncertainty'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton most-probable thermal speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s proton bulk velocity moment in RTN frame vp_moment_RTN Master CDF CATDESC: 'Proton bulk velocity from the 1st moment of the reduced distribution function in [inertial] RTN coordinate system (All Qualities)'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton bulk speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s proton bulk velocity moment upper uncertainty in the RTN frame vp_moment_RTN_deltahigh Master CDF CATDESC: '---> upper uncertainty'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton most-probable thermal speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s proton bulk velocity moment lower uncertainty in the RTN frame vp_moment_RTN_deltalow Master CDF CATDESC: '---> lower uncertainty'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton most-probable thermal speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s proton bulk density moment np_moment Master CDF CATDESC: 'Proton density estimate from the 0th moment of the reduced distribution function (All Qualities)'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton density, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) cm^{-3} -1e+31 proton bulk density moment, upper uncertainty np_moment_deltahigh Master CDF CATDESC: '---> upper uncertainty'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton density, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) cm^{-3} -1e+31 proton bulk density moment, lower uncertainty np_moment_deltalow Master CDF CATDESC: '---> lower uncertainty'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton density, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) cm^{-3} -1e+31 proton bulk thermal speed moment wp_moment Master CDF CATDESC: 'Proton radial [most probable] thermal speed estimate from the 2nd velocity moment of the reduced distribution function (All Qualities)'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton most-probable thermal speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) km/s -1e+31 proton bulk thermal speed moment, upper uncertainty wp_moment_deltahigh Master CDF CATDESC: '---> upper uncertainty'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton most-probable thermal speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) km/s -1e+31 proton bulk thermal speed moment, lower uncertainty wp_moment_deltalow Master CDF CATDESC: '---> lower uncertainty'. Master CDF VAR_NOTES: 'This moment is a model-independant estimate of the proton most-probable thermal speed, but it is subject to confusion with alpha particles when present. Error bars represent estimated upper and lower limits.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) km/s -1e+31 Primary proton velocity in spacecraft frame vp1_fit_SC Master CDF CATDESC: 'Primary proton population velocity, from 1-dimensional Maxwellian fitting, in the spacecraft frame (All Qualities)'. Master CDF VAR_NOTES: 'The strongest signal peak, which generally corresponds to the bulk proton population in the solar wind, is fit to a convected Maxwellian model. '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s Primary proton velocity uncertainty in spacecraft frame vp1_fit_SC_uncertainty Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. The flow angles relative to the SPC are obtained by comparing fluxes upon the four sensor quadrants. This uncertainty incorporates uncertainties in the absolute responses of the respective sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s Primary proton velocity in RTN frame vp1_fit_RTN Master CDF CATDESC: 'Primary proton population velocity, from 1-dimensional Maxwellian fitting, in the [inertial] RTN frame (All Qualities)'. Master CDF VAR_NOTES: 'The strongest signal peak, which generally corresponds to the bulk proton population in the solar wind, is fit to a convected Maxwellian model. '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s Primary proton velocity uncertainty in RTN frame vp1_fit_RTN_uncertainty Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. The flow angles relative to the SPC are obtained by comparing fluxes upon the four sensor quadrants. This uncertainty incorporates uncertainties in the absolute responses of the respective sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s Primary proton density np1_fit Master CDF CATDESC: 'Primary proton population density, from 1-dimensional Maxwellian fitting. (All Qualities)'. Master CDF VAR_NOTES: 'The strongest signal peak, which generally corresponds to the bulk proton population in the solar wind, is fit to a convected Maxwellian model.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) cm^{-3} -1e+31 Primary proton density, fit uncertainty np1_fit_uncertainty Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. This variable reflects *precision* uncertainty from fitting, summed in quadrature with the *accuracy* uncertainy associated with the absolute responses of the SPC sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) cm^{-3} -1e+31 Primary proton thermal speed wp1_fit Master CDF CATDESC: 'Primary proton population radial [most probable] thermal speed, from 1-dimensional Maxwellian fitting. (All Qualities)'. Master CDF VAR_NOTES: 'The strongest signal peak, which generally corresponds to the bulk proton population in the solar wind, is fit to a convected Maxwellian model. This measurement most accurately represents the thermal width of the reduced phase-space-distribution function along the SPC-normal direction. This roughly corresponds to the radial component of the temperature tensor. This is a most probable thermal speed, i.e. the model distribution goes like exp(-v^2/w^2).'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) km/s -1e+31 Primary proton thermal speed, fit uncertainty wp1_fit_uncertainty Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. This variable reflects *precision* uncertainty from fitting, summed in quadrature with the *accuracy* uncertainy associated with the absolute responses of the SPC sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) km/s -1e+31 Proton bulk velocity in the spacecraft frame vp_fit_SC Master CDF CATDESC: 'Proton bulk velocity, from 1-dimensional Maxwellian fitting, in the spacecraft frame (All Qualities)'. Master CDF VAR_NOTES: 'the bulk proton population in the solar wind is fit to a group of convected Maxwellian models. '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s proton bulk velocity, fit uncertainty in the spacecraft frame vp_fit_SC_uncertainty Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. The flow angles relative to the SPC are obtained by comparing fluxes upon the four sensor quadrants. This uncertainty incorporates uncertainties in the absolute responses of the respective sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s Proton bulk velocity in RTN frame vp_fit_RTN Master CDF CATDESC: 'Proton bulk velocity, from 1-dimensional Maxwellian fitting, in the [inertial] RTN frame (All Qualities)'. Master CDF VAR_NOTES: 'the bulk proton population in the solar wind is fit to a group of convected Maxwellian models. '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s proton bulk velocity, fit uncertainty in RTN frame vp_fit_RTN_uncertainty Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. The flow angles relative to the SPC are obtained by comparing fluxes upon the four sensor quadrants. This uncertainty incorporates uncertainties in the absolute responses of the respective sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s proton density np_fit Master CDF CATDESC: '[Total] proton density, from 1-dimensional Maxwellian fitting. (All Qualities)'. Master CDF VAR_NOTES: 'the bulk proton population in the solar wind is fit to a group of convected Maxwellian models.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) cm^{-3} -1e+31 proton density, fit uncertainty np_fit_uncertainty Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. This variable reflects *precision* uncertainty from fitting, summed in quadrature with the *accuracy* uncertainy associated with the absolute responses of the SPC sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) cm^{-3} -1e+31 Proton bulk thermal speed wp_fit Master CDF CATDESC: 'Proton radial [most probable] thermal speed component, from 1-dimensional Maxwellian fitting. (All Qualities)'. Master CDF VAR_NOTES: 'the bulk proton population in the solar wind is fit to a group of convected Maxwellian models.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) km/s -1e+31 bulk proton thermal speed, fit uncertainty wp_fit_uncertainty Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. This variable reflects *precision* uncertainty from fitting, summed in quadrature with the *accuracy* uncertainy associated with the absolute responses of the SPC sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) km/s -1e+31 alpha particle velocity in spacecraft frame va_fit_SC Master CDF CATDESC: 'Alpha particle velocity vector, from 1-dimensional Maxwellian fitting, in the spacecraft frame (All Qualities)'. Master CDF VAR_NOTES: 'The alpha particle (He++) peak in the solar wind, when clearly distinguishable, is fit to a convected Maxwellian model. '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s alpha particle velocity fit uncertainty the spacecraft frame va_fit_SC_uncertainty Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. The flow angles relative to the SPC are obtained by comparing fluxes upon the four sensor quadrants. This uncertainty incorporates uncertainties in the absolute responses of the respective sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s alpha particle velocity in RTN frame va_fit_RTN Master CDF CATDESC: 'Alpha particle velocity vector, from 1-dimensional Maxwellian fitting, in the [inertial] RTN frame (All Qualities)'. Master CDF VAR_NOTES: 'The alpha particle (He++) peak in the solar wind, when clearly distinguishable, is fit to a convected Maxwellian model. '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s alpha particle velocity fit uncertainty in the RTN frame va_fit_RTN_uncertainty Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. The flow angles relative to the SPC are obtained by comparing fluxes upon the four sensor quadrants. This uncertainty incorporates uncertainties in the absolute responses of the respective sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s alpha particle density na_fit Master CDF CATDESC: 'Alpha particle density, from 1-dimensional Maxwellian fitting. (All Qualities)'. Master CDF VAR_NOTES: 'The alpha particle (He++) peak in the solar wind, when clearly distinguishable, is fit to a convected Maxwellian model.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) cm^{-3} -1e+31 alpha particle density fit uncertainty na_fit_uncertainty Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. This variable reflects *precision* uncertainty from fitting, summed in quadrature with the *accuracy* uncertainy associated with the absolute responses of the SPC sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) cm^{-3} -1e+31 alpha particle thermal speed wa_fit Master CDF CATDESC: 'Alpha particle radial [most probable] thermal speed, from 1-dimensional Maxwellian fitting. (All Qualities)'. Master CDF VAR_NOTES: 'The alpha particle (He++) peak in the solar wind, when clearly distinguishable, is fit to a convected Maxwellian model. This measurement most accurately represents the thermal width of the reduced phase-space-distribution function along the SPC-normal direction. This roughly corresponds to the radial component of the temperature tensor. This is a most probable thermal speed, i.e. the model distribution goes like exp(-v^2/w^2).'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) km/s -1e+31 alpha particle thermal speed fit uncertainty wa_fit_uncertainty Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. This variable reflects *precision* uncertainty from fitting, summed in quadrature with the *accuracy* uncertainy associated with the absolute responses of the SPC sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) km/s -1e+31 population 3 velocity in spacecraft frame v3_fit_SC Master CDF CATDESC: 'Population 3 velocity vector, from 1-dimensional Maxwellian fitting, in the spacecraft frame (All Qualities)'. Master CDF VAR_NOTES: 'The population 3 peak in the solar wind, when clearly distinguishable, is fit to a convected Maxwellian model. Population 3 most typically characterizes a proton shoulder or beam (mtoq=1)'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s population 3 velocity uncertainty in spacecraft frame v3_fit_SC_uncertainty Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. The flow angles relative to the SPC are obtained by comparing fluxes upon the four sensor quadrants. This uncertainty incorporates uncertainties in the absolute responses of the respective sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s population 3 velocity in RTN frame v3_fit_RTN Master CDF CATDESC: 'Population 3 velocity vector, from 1-dimensional Maxwellian fitting, in the [inertial] RTN frame (All Qualities)'. Master CDF VAR_NOTES: 'The population 3 peak in the solar wind, when clearly distinguishable, is fit to a convected Maxwellian model. Population 3 most typically characterizes a proton shoulder or beam (mtoq=1)'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s population 3 velocity uncertainty in RTN frame v3_fit_RTN_uncertainty Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. The flow angles relative to the SPC are obtained by comparing fluxes upon the four sensor quadrants. This uncertainty incorporates uncertainties in the absolute responses of the respective sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -1e+31 3 (All Qs) km/s (All Qs) km/s (All Qs) km/s population 3 particle density n3_fit Master CDF CATDESC: 'Population 3 particle density, from 1-dimensional Maxwellian fitting. (All Qualities)'. Master CDF VAR_NOTES: 'The population 3 particle peak in the solar wind, when clearly distinguishable, is fit to a convected Maxwellian model. Population 3 most typically characterizes a proton shoulder or beam (mtoq=1)'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) cm^{-3} -1e+31 population 3 density, fit uncertainty n3_fit_uncertainty Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. This variable reflects *precision* uncertainty from fitting, summed in quadrature with the *accuracy* uncertainy associated with the absolute responses of the SPC sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) cm^{-3} -1e+31 population 3 thermal speed w3_fit Master CDF CATDESC: 'Population 3 particle radial [most probable] thermal speed, from 1-dimensional Maxwellian fitting. (All Qualities)'. Master CDF VAR_NOTES: 'The population 3 peak in the solar wind, when clearly distinguishable, is fit to a convected Maxwellian model. Population 3 most typically characterizes a proton shoulder or beam (mtoq=1) This measurement most accurately represents the thermal width of the reduced phase-space-distribution function along the SPC-normal direction. This roughly corresponds to the radial component of the temperature tensor. This is a most probable thermal speed, i.e. the model distribution goes like exp(-v^2/w^2). '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) km/s -1e+31 population 3 thermal speed, fit uncertainty w3_fit_uncertainty Master CDF CATDESC: '---> 1-sigma error'. Master CDF VAR_NOTES: 'This uncertainty may be invalid when the Maxwellian is a poor model for the data. Refer to the data quality flags. This variable reflects *precision* uncertainty from fitting, summed in quadrature with the *accuracy* uncertainy associated with the absolute responses of the SPC sensors.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) km/s -1e+31 population 3 mass-to-charge ratio pop3_mtoq Master CDF CATDESC: 'Species identifier for third population fit (in addition to primary proton and alpha peaks) (All Qualities)'. Master CDF VAR_NOTES: 'When the n3_fit, w3_fit, and/or v3_fit variables are valid, they indicate that a third ion population has been measured in addition to the primary proton and alpha particle populations. This variable indicates the estimated mass-per-charge for that population, in fundamental units (i.e. protons=1/1=1, alphas=4/2=2, O6=16/6=2.67). Population 3 most typically characterizes a proton shoulder or beam (mtoq=1)'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (All Qs) u/e -1e+31