2.7.1 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NASA/NumericalData/ACE/SWICS/L2/PT2H NASA NumericalData ACE SWICS 2.0 Solar Wind 2-Hour Data https://doi.org/10.48322/xcsn-8w62 2025-12-04T13:28:25Z 2021-04-27T15:38:11 Only known prior ReleaseDate of the metadata 2023-07-30T12:34:56.789 Added DOI and PublicationInfo minted by LFB, metadata versioned up to SPASE 2.6.0, reviewed by LFB 20230727 2025-09-02T12:34:56.789 Update ObservedRegion. JMW 2025-09-30T14:27:19Z Updated PublishedBy name to match ROR Registry. Added ResourceType and NamingAuthority. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to updated value in Version tag. ZCB 2025-12-04T13:28:25Z Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB The SWICS 2.0 dataset consists of time series measurements by ACE/SWICS of the elemental abundance, charge state composition, and kinetic distribution of heavy ions in the solar wind. This data set begins after August 23, 2011, when a radiation and age-induced hardware anomaly altered the instrument's operational state. It should not be confused with SWICS 1.1, the recalibrated data set extending from launch up to the anomaly. SWICS 2.0 continues to make heavy ion measurements which are not available from any other instrument, and new data analysis methods have been developed to address the statistical and calibration issues of the current instrument state. Gloeckler, George, M.; McGuire, Robert, E. 2023-01-01T00:00:00 Space Physics Data Facility; California Institute of Technology spase://SMWG/Person/George.Gloeckler PrincipalInvestigator spase://SMWG/Person/Robert.E.McGuire GeneralContact spase://SMWG/Person/Lee.Frost.Bargatze MetadataContact Release notes for SWICS 2.0 level 2 data http://www.srl.caltech.edu/ACE/ASC/DATA/level2/ss2/swics_lv2_V2_release_notes.txt Additional details provided by the instrument team. All users of SWICS data should read these notes. spase://VSPO/NumericalData/ACE/SWICS/L2/PT2H spase://SMWG/Repository/ACE_SC Online Open ACE Science Center (ASC) http://www.srl.caltech.edu/ACE/ASC/level2/lvl2DATA_SWICS_2.0.html CDAWeb https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=AC_H3_SW2&index=sp_phys AC_H3_SW2 FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/ace/swics/level_2_cdaweb/sw2_h3/ In CDF via ftp from CDAWeb HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/ace/swics/level_2_cdaweb/sw2_h3/ In CDF via HTTP from CDAWeb Text spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb Online Open https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products CDAWeb HAPI Server https://cdaweb.gsfc.nasa.gov/hapi AC_H3_SW2 Web Service to this product using the HAPI interface. CSV CALIBRATED spase://SMWG/Instrument/ACE/SWICS ThermalPlasma IonComposition 2012-06-01T00:00:00 -P8M PT2H Heliosphere Heliosphere.Inner Heliosphere.NearEarth Epoch Time Epoch Number of milliseconds since the CDF epoch. PT2H ms 1e-3>s 01-Jan-1956 00:00:00.000 01-Jan-2083 00:00:00.000 -1.0E31 Temporal Solar Wind He++ Speed vHe2 Solar Wind He++ speed, scalar PT2H km/s 0.0 2000.0 -1.0E31 Ion Scalar Magnitude Velocity Solar Wind He++ Thermal speed vthHe2 Solar Wind He++ Thermal speed, scalar PT2H km/s 0.0 2000.0 -1.0E31 Ion Scalar ThermalSpeed He quality flag He_qual Quality flag for the helium speed and density data. 0: value within sensitive range of SWICS 2.0 1: value saturated at lower limit 2: value saturated at upper limit 0.0 16 -1 Other C+6/C+5 Ratio C6to5 C+6/C+5 Solar Wind charge_state Ratio PT2H 0.0 100.0 -1.0E31 Ion Ratio ChargeState C+6/C+5 Ratio Err C6to5_err C+6/C+5 Statistical Uncertainty 0.0 100.0 -1e31 Ion Uncertainty Ratio ChargeState C+6/C+5 Quality Flag C6to5_qual Quality flag for C+6/C+5 Solar Wind charge_state Ratio. 0: value within sensitive range of SWICS 2.0 1: value saturated at lower limit 2: value saturated at upper limit 0 16 -1 Other O+7/O+6 Ratio O7to6 O+7/O+6 Solar Wind charge_state Ratio PT2H 0.0 100.0 -1.0E31 Ion Ratio ChargeState O+7/O+6 Ratio Err O7to6_err O+7/O+6 Statistical Uncertainty 0.0 100.0 -1.0E31 Ion Uncertainty Ratio ChargeState O+7/O+6 Quality Flag O7to6_qual Quality flag for O+7/O+6 Solar Wind charge_state Ratio 0: value within sensitive range of SWICS 2.0 1: value saturated at lower limit 2: value saturated at upper limit 0 16 -1 Other O+8/O+6 Ratio O8to6 O+8/O+6 Solar Wind charge_state Ratio PT2H 0.0 100.0 -1.0E31 Ion Ratio ChargeState O+8/O+6 Ratio Err O8to6_err O+8/O+6 Statistical Uncertainty 0.0 100.0 -1.0E31 Ion Uncertainty Ratio ChargeState O+8/O+6 Quality Flag O8to6_qual Quality flag for O+8/O+6 Solar Wind charge_state Ratio 0: value within sensitive range of SWICS 2.0 1: value saturated at lower limit 2: value saturated at upper limit 0 16 -1 Other Average Iron charge state avqFe Iron Solar Wind average charge state ionic charge 0.0 26.0 -1e31 Ion Average ChargeState Average Iron charge state err avqFe_err Iron average charge state Statistical Uncertainty ionic charge 0.0 26.0 -1e31 Ion Uncertainty Average ChargeState Average Iron charge state quality flag avqFe_qual Quality flag for Iron Solar Wind average charge state 0: value within sensitive range of SWICS 2.0 1: value saturated at lower limit 2: value saturated at upper limit 0 16 -1 Other Fe/O elemental abundance ratio FetoO Fe/O Solar Wind elemental abundance ratio ionic charge 0.0 10.0 -1e31 Ion Ratio NumberDensity Fe/O statistical uncertainty FetoO_err Fe/O statistical uncertainty 0.0 10.0 -1e31 Ion Uncertainty Ratio NumberDensity Fe/O quality flag FetoO_qual Quality Flag for Fe/O Solar Wind elemental abundance ratio. 0: value within sensitive range of SWICS 2.0 1: value saturated at lower limit 2: value saturated at upper limit 0 16 -1 Other