<?xml version="1.0" encoding="UTF-8"?> <Spase xmlns="http://www.spase-group.org/data/schema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.spase-group.org/data/schema http://www.spase-group.org/data/schema/spase-2_3_1.xsd"> <Version>2.3.1</Version> <NumericalData> <ResourceID>spase://CNES/NumericalData/CDPP-AMDA/PSP/SPC/psp-spc-fit</ResourceID> <ResourceHeader> <ResourceName>fits</ResourceName> <AlternateName>SWEAP Level 3 fits</AlternateName> <ReleaseDate>2019-11-12T10:48:29Z</ReleaseDate> <Description> This data product contains derived measurements of ion properties in the solar wind, including density, temperature, velocity vector. The velocity, temperature, and density of the solar wind proton population are estimated by fitting each spectrum to a single Maxwellian or a set of Maxwellian ion populations. * p1 fit to the “primary” proton peak. This is the peak or largest amplitude observed in a given l2i spectrum. A locus of measurements is selected that includes the absolute maximum and at least the 1/e folding, if possible, on either side for this fit. * a fit to the “primary” alpha particle (He++) peak, if resolved. For l3i measurements, this is “guessed” by searching for a secondary peak in each l2i spectrum in the neighborhood of twice the p1 peak energy. * 3 if an additional high signal-to-noise feature is present in the l2i spectrum, typically due to a proton beam or shoulder but also potentially due to a cold minor ion population, a fit is attempted to the p1-subtracted residuals on this neighborhood. The POP3_MTOQ variable is used to indicate the species. * p_tot if p1 and 3 are successfully fit, and the 3 population is determined to be protons, this signifies the total proton parameters (np =total proton density, vp = center of mass velocity, wp = effective thermal velocity, accounting for both populations and their relative drift). </Description> <Acknowledgement> Please acknowledge the NASA Parker Solar Probe Mission and SWEAP team led by Justin Kasper for use of data. </Acknowledgement> <Contact> <PersonID>spase://SMWG/Person/Justin.C.Kasper</PersonID> <Role>PrincipalInvestigator</Role> </Contact> <Contact> <PersonID>spase://SMWG/Person/Anthony.W.Case</PersonID> <Role>SPCInstrumentScientist</Role> </Contact> <InformationURL> <Name>User Guide</Name> <URL>https://spdf.sci.gsfc.nasa.gov/pub/data/psp/sweap/sweap_data_user_guide.pdf</URL> <Description> User Guide for Parker Solar Probe SWEAP-SPC Investigation Data Products </Description> </InformationURL> </ResourceHeader> <AccessInformation> <RepositoryID>spase://SMWG/Repository/CNES/CDPP-AMDA</RepositoryID> <Availability>Online</Availability> <AccessRights>Open</AccessRights> <AccessURL> <Name>AMDA at CDPP</Name> <URL> http://amda.cdpp.eu </URL> </AccessURL> <Format>Text</Format> <Acknowledgement> AMDA is a science analysis system provided by the Centre de Donnees de la Physique des Plasmas (CDPP) supported by CNRS, CNES, Observatoire de Paris and Universite Paul Sabatier, Toulouse </Acknowledgement> </AccessInformation> <ProviderName>SPDF</ProviderName> <ProviderResourceName>psp/sweap/spc/l3/l3i/</ProviderResourceName> <ProviderAcknowlegment> Please acknowledge the CDAWeb team at GSFC/SPDF.</ProviderAcknowlegment> <InstrumentID>spase://CNES/Instrument/CDPP-AMDA/PSP/SPC</InstrumentID> <MeasurementType>Spectrum</MeasurementType> <TemporalDescription> <TimeSpan> <StartDate>2018-09-02T00:00:12Z</StartDate> <StopDate>2025-08-12T23:59:55Z</StopDate> </TimeSpan> <CadenceMin>PT0.002S</CadenceMin> <CadenceMax>PT250S</CadenceMax> </TemporalDescription> <ObservedRegion>Heliosphere.Inner</ObservedRegion> <ObservedRegion>Sun.Corona</ObservedRegion> <!-- Parameters with p1 fit --> <Parameter> <Name>np1</Name> <ParameterKey>psp_spc_np1</ParameterKey> <Description> Number density, fitted to the “primary” proton peak </Description> <Units>cm-3</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> </Parameter> <Parameter> <Name>np1_uncertainty</Name> <ParameterKey>psp_spc_dnp1</ParameterKey> <Description> Estimated uncertainty on the number density, fitted to the “primary” proton peak </Description> <Units>cm-3</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> </Parameter> <Parameter> <Name>wp1</Name> <ParameterKey>psp_spc_wp1</ParameterKey> <Description> Thermal velocity = sqrt(2kT/m), fitted to the “primary” proton peak </Description> <Units>km/s</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> </Parameter> <Parameter> <Name>wp1_uncertainty</Name> <ParameterKey>psp_spc_dwp1</ParameterKey> <Description> Estimated uncertainty on the thermal velocity, fitted to the “primary” proton peak </Description> <Units>km/s</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> </Parameter> <Parameter> <Name>vp1_rtn</Name> <ParameterKey>psp_spc_vp1</ParameterKey> <Description> Velocity vector, estimated from the radial thermal velocity fit p1 and flow angle </Description> <Units>km/s</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> <Structure> <Size>3</Size> <Element> <Name>vp1r</Name> <Qualifier>Component.I</Qualifier> <Index>1</Index> <ParameterKey>psp_spc_vp1(0)</ParameterKey> </Element> <Element> <Name>vp1t</Name> <Qualifier>Component.J</Qualifier> <Index>2</Index> <ParameterKey>psp_spc_vp1(1)</ParameterKey> </Element> <Element> <Name>vp1n</Name> <Qualifier>Component.K</Qualifier> <Index>3</Index> <ParameterKey>psp_spc_vp1(2)</ParameterKey> </Element> </Structure> </Parameter> <Parameter> <Name>vp1_uncertainty</Name> <ParameterKey>psp_spc_dvp1</ParameterKey> <Description> Velocity vector component upper uncertainties </Description> <Units>km/s</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> <Structure> <Size>3</Size> <Element> <Name>dvp1r</Name> <Qualifier>Component.I</Qualifier> <Index>1</Index> <ParameterKey>psp_spc_dvp1(0)</ParameterKey> </Element> <Element> <Name>dvp1t</Name> <Qualifier>Component.J</Qualifier> <Index>2</Index> <ParameterKey>psp_spc_dvp1(1)</ParameterKey> </Element> <Element> <Name>dvp1n</Name> <Qualifier>Component.K</Qualifier> <Index>3</Index> <ParameterKey>psp_spc_dvp1(2)</ParameterKey> </Element> </Structure> </Parameter> <!-- Parameters with "a" fit --> <Parameter> <Name>na</Name> <ParameterKey>psp_spc_na</ParameterKey> <Description> Number density, fitted to the “primary” alpha particle (He++) peak, if resolved </Description> <Units>cm-3</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> </Parameter> <Parameter> <Name>na_uncertainty</Name> <ParameterKey>psp_spc_dna</ParameterKey> <Description> Estimated uncertainty on the number density, fitted to the “primary” alpha particle (He++) peak, if resolved </Description> <Units>cm-3</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> </Parameter> <Parameter> <Name>wa</Name> <ParameterKey>psp_spc_wa</ParameterKey> <Description> Thermal velocity = sqrt(2kT/m), fitted to the “primary” alpha particle (He++) peak, if resolved </Description> <Units>km/s</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> </Parameter> <Parameter> <Name>wa_uncertainty</Name> <ParameterKey>psp_spc_dwa</ParameterKey> <Description> Estimated uncertainty on the thermal velocity, fitted to the “primary” alpha particle (He++) peak, if resolved </Description> <Units>km/s</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> </Parameter> <Parameter> <Name>va_rtn</Name> <ParameterKey>psp_spc_va</ParameterKey> <Description> Velocity vector, estimated from the radial thermal velocity fit and flow angle </Description> <Units>km/s</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> <Structure> <Size>3</Size> <Element> <Name>var</Name> <Qualifier>Component.I</Qualifier> <Index>1</Index> <ParameterKey>psp_spc_va(0)</ParameterKey> </Element> <Element> <Name>vat</Name> <Qualifier>Component.J</Qualifier> <Index>2</Index> <ParameterKey>psp_spc_va(1)</ParameterKey> </Element> <Element> <Name>van</Name> <Qualifier>Component.K</Qualifier> <Index>3</Index> <ParameterKey>psp_spc_va(2)</ParameterKey> </Element> </Structure> </Parameter> <Parameter> <Name>va_uncertainty</Name> <ParameterKey>psp_spc_dva</ParameterKey> <Description> Velocity vector component uncertainties </Description> <Units>km/s</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> <Structure> <Size>3</Size> <Element> <Name>dvar</Name> <Qualifier>Component.I</Qualifier> <Index>1</Index> <ParameterKey>psp_spc_dva(0)</ParameterKey> </Element> <Element> <Name>dvat</Name> <Qualifier>Component.J</Qualifier> <Index>2</Index> <ParameterKey>psp_spc_dva(1)</ParameterKey> </Element> <Element> <Name>dvan</Name> <Qualifier>Component.K</Qualifier> <Index>3</Index> <ParameterKey>psp_spc_dva(2)</ParameterKey> </Element> </Structure> </Parameter> <!-- parameters with 3 fit --> <Parameter> <Name>n3</Name> <ParameterKey>psp_spc_n3</ParameterKey> <Description> Number density, fitted to the p1 substracted residuals </Description> <Units>cm-3</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> </Parameter> <Parameter> <Name>n3_uncertainty</Name> <ParameterKey>psp_spc_dn3</ParameterKey> <Description> Estimated uncertainty on the number density, fitted to the p1 substracted residuals </Description> <Units>cm-3</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> </Parameter> <Parameter> <Name>w3</Name> <ParameterKey>psp_spc_w3</ParameterKey> <Description> Thermal velocity = sqrt(2kT/m), fitted to the p1 substracted residuals </Description> <Units>km/s</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> </Parameter> <Parameter> <Name>w3_uncertainty</Name> <ParameterKey>psp_spc_dw3</ParameterKey> <Description> Estimated uncertainty on the thermal velocity, fitted to the p1 substracted residuals </Description> <Units>km/s</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> </Parameter> <Parameter> <Name>v3_rtn</Name> <ParameterKey>psp_spc_v3</ParameterKey> <Description> Velocity vector, estimated from the radial thermal velocity fit and flow angle </Description> <Units>km/s</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> <Structure> <Size>3</Size> <Element> <Name>v3r</Name> <Qualifier>Component.I</Qualifier> <Index>1</Index> <ParameterKey>psp_spc_v3(0)</ParameterKey> </Element> <Element> <Name>v3t</Name> <Qualifier>Component.J</Qualifier> <Index>2</Index> <ParameterKey>psp_spc_v3(1)</ParameterKey> </Element> <Element> <Name>v3n</Name> <Qualifier>Component.K</Qualifier> <Index>3</Index> <ParameterKey>psp_spc_v3(2)</ParameterKey> </Element> </Structure> </Parameter> <Parameter> <Name>v3_uncertainty</Name> <ParameterKey>psp_spc_dv3</ParameterKey> <Description> Velocity vector component uncertainties </Description> <Units>km/s</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> <Structure> <Size>3</Size> <Element> <Name>dv3r</Name> <Qualifier>Component.I</Qualifier> <Index>1</Index> <ParameterKey>psp_spc_dv3(0)</ParameterKey> </Element> <Element> <Name>dv3t</Name> <Qualifier>Component.J</Qualifier> <Index>2</Index> <ParameterKey>psp_spc_dv3(1)</ParameterKey> </Element> <Element> <Name>dv3n</Name> <Qualifier>Component.K</Qualifier> <Index>3</Index> <ParameterKey>psp_spc_dv3(2)</ParameterKey> </Element> </Structure> </Parameter> <!-- parameters with p tot --> <Parameter> <Name>np_tot</Name> <ParameterKey>psp_spc_np_tot</ParameterKey> <Description> If p1 and 3 are successfully fitted, total proton density </Description> <Units>cm-3</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> </Parameter> <Parameter> <Name>np_tot_uncertainty</Name> <ParameterKey>psp_spc_dnp_tot</ParameterKey> <Description> Estimated uncertainty on the number density </Description> <Units>cm-3</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> </Parameter> <Parameter> <Name>wp_fit</Name> <ParameterKey>psp_spc_wp_tot</ParameterKey> <Description> If p1 and 3 are successfully fitted, effective thermal velocity </Description> <Units>km/s</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> </Parameter> <Parameter> <Name>wp_tot_uncertainty</Name> <ParameterKey>psp_spc_dwp_tot</ParameterKey> <Units>km/s</Units> <Description> Estimated uncertainty on the thermal velocity </Description> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> </Parameter> <Parameter> <Name>vp_tot_rtn</Name> <ParameterKey>psp_spc_vp_tot</ParameterKey> <Description> If p1 and 3 are successfully fitted, center of mass velocity vector </Description> <Units>km/s</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> <Structure> <Size>3</Size> <Element> <Name>vp_totr</Name> <Qualifier>Component.I</Qualifier> <Index>1</Index> <ParameterKey>psp_spc_vp_tot(0)</ParameterKey> </Element> <Element> <Name>vp_tott</Name> <Qualifier>Component.J</Qualifier> <Index>2</Index> <ParameterKey>psp_spc_vp_tot(1)</ParameterKey> </Element> <Element> <Name>vp_totn</Name> <Qualifier>Component.K</Qualifier> <Index>3</Index> <ParameterKey>psp_spc_vp_tot(2)</ParameterKey> </Element> </Structure> </Parameter> <Parameter> <Name>vp_tot_uncertainty</Name> <ParameterKey>psp_spc_dvp_tot</ParameterKey> <Description> Velocity vector component uncertainties </Description> <Units>km/s</Units> <RenderingHints> <DisplayType>TimeSeries</DisplayType> </RenderingHints> <Structure> <Size>3</Size> <Element> <Name>dvp_totr</Name> <Qualifier>Component.I</Qualifier> <Index>1</Index> <ParameterKey>psp_spc_dvp_tot(0)</ParameterKey> </Element> <Element> <Name>dvp_tott</Name> <Qualifier>Component.J</Qualifier> <Index>2</Index> <ParameterKey>psp_spc_dvp_tot(1)</ParameterKey> </Element> <Element> <Name>dvp_totn</Name> <Qualifier>Component.K</Qualifier> <Index>3</Index> <ParameterKey>psp_spc_dvp_tot(2)</ParameterKey> </Element> </Structure> </Parameter> </NumericalData> </Spase>