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/PT12M NASA NumericalData ACE SWICS 2.0 Solar Wind Protons 12-min Data https://doi.org/10.48322/mfxn-cw77 2026-06-26T13:14:22Z 2021-04-27T15:38:11Z Only known prior ReleaseDate of the metadata 2023-07-30T12:34:56.789Z Added DOI and PublicationInfo minted by LFB, metadata versioned up to SPASE 2.6.0, reviewed by LFB 20230727 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 2026-06-26T13:14:22Z Add 'Z' to RevisionEvent:ReleaseDate(s), PublicationDate, TemporalDescription:TimeSpan:StartDate. ZCB The SWICS 12-minute proton data contains densities, speeds, and thermal speeds from the beginning of the mission up to the present day. The densities have been cross-calibrated to the proton monitors ACE/SWEPAM and WIND/SWE, and represent a continuous data set that can be used in conjunction with other SWICS data, or as a stand-alone measurement. For details on the SWICS proton data, see the release notes provided by the instrument team: http://www.srl.caltech.edu/ACE/ASC/DATA/level2/ssprotons/swics_protons_release_notes.txt Gloeckler, George, M.; McGuire, Robert, E. 2023-01-01T00:00:00Z 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/ssprotons/swics_protons_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/PT12M spase://SMWG/Repository/ACE_SC Online Open ACE Science Center (ASC) http://www.srl.caltech.edu/ACE/ASC/level2/lvl2DATA_SWICS_PROTONS.html HDF 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 https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=AC_H6_SWI&index=sp_phys AC_H6_SWI FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/ace/swics/level_2_cdaweb/swi_h6/ In CDF via ftp from CDAWeb HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/ace/swics/level_2_cdaweb/swi_h6/ In CDF via HTTP from CDAWeb CDF https://cdaweb.gsfc.nasa.gov/pub/data/ace/swics/level_2_cdaweb/swi_h6/$Y ac_h6_swi_$Y$m$d_$v.cdf spase://SMWG/Repository/NASA/GSFC/SPDF Online Open CDAWeb Programmatic Data Access https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/AC_H6_SWI/clientLibraryExample/ AC_H6_SWI Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS. Binary 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_H6_SWI Web Service to this product using the HAPI interface. CSV CALIBRATED spase://SMWG/Instrument/ACE/SWICS ThermalPlasma 1998-01-29T00:07:03Z -P4M PT12M Heliosphere.NearEarth Epoch Time Epoch Number of milliseconds since the CDF epoch. PT12M ms 1e-3>s 01-Jan-1996 00:00:00.000 01-Jan-2020 00:00:00.000 -1.0E31 Temporal Proton density nH nH is the number density of Protons in the solar wind in units of #/cm^3 PT12M #/cm^3 0.0 200.0 -1.0E31 Proton Magnitude NumberDensity Proton density error nH_err nH_err is the statistical uncertainty in the number density of Protons in the solar wind, in #/cm^3 PT12M #/cm^3 0.0 200.0 -1.0E31 Proton Uncertainty NumberDensity Solar Wind Proton speed vH vH is the mean Proton speed in the solar wind, in km/s. PT12M km/s 0.0 2000.0 -1.0E31 Proton Magnitude FlowSpeed Solar Wind Proton Thermal speed vthH vthH is the thermal speed of Protons in the solar wind, in km/s PT12M km/s 0.0 2000.0 -1.0E31 Proton Magnitude ThermalSpeed