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/MAG/L2/PT16S NASA NumericalData ACE Magnetic Field 16-Second Level 2 Data https://doi.org/10.48322/e0dc-0h53 2025-12-04T13:28:24Z 2021-04-27T15:38:11 Only known prior ReleaseDate of the metadata 2022-08-19T12:34:56.789 Added DOI and PublicationInfo minted by JMW on 20220808, updated three InformationURL URLs, updated the RepositoryID, added Robert M. Candey SPDF MetadataContact, metadata updated to SPASE 2.4.1, reviewed by LFB 20220819 2025-09-30T14:27:18Z 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 2025-12-04T13:28:24Z Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB ACE Magnetometer level 2 data, 16-second averages of field magnitude and GSE and GSM Cartesian components, plus standard deviations, plus ACE location data. The data are accessible via ftp in HDF and CDF from the ACE Science Center and CDAWeb, respectively, and in ASCII format from the value-added interfaces at those sites. The "parameter keys" given below are as used by CDAWeb. One-sec, 4-min, 1-hr, 1-day and 27-day averages are also available via the access paths given below. Please acknowledge the ACE/MAG instrument team and the ACE Science Center Smith, C.W., and N.F. Ness 2022-01-01T00:00:00 Space Physics Data Facility; California Institute of Technology spase://SMWG/Person/Norman.F.Ness CoInvestigator spase://SMWG/Person/Charles.W.Smith TechnicalContact spase://SMWG/Person/Robert.M.Candey MetadataContact spase://SMWG/Person/James.M.Weygand MetadataContact spase://SMWG/Person/Lee.Frost.Bargatze MetadataContact ACE Magnetometer (MAG) Level 2 data Home Page https://izw1.caltech.edu/ACE/ASC/level2/mag_l2desc.html ACE Science Center site hosting instrument information, data release notes, as well as web utilities for plotting and downloading data Rules of use, and caveats https://izw1.caltech.edu/ACE/ASC/level2/policy_lvl2.html ACE level 2 data rules of use, and caveats spase://VHO/NumericalData/ACE/MAG/L2_PT16S spase://VSPO/NumericalData/ACE/MAG/L2/PT16S 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 FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/ace/mag/level_2_cdaweb/mfi_h0/ In CDF via ftp from CDAWeb HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/ace/mag/level_2_cdaweb/mfi_h0/ In CDF via HTTP from SPDF CDF Please acknowledge the ACE/MAG instrument team, the ACE Science Center, and the CDAWeb team at GSFC/SPDF. 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_H0_MFI&index=sp_phys AC_H0_MFI ACE/MAG L2 16-sec data with subset, plot, list functionalities from CDAWeb Text Please acknowledge the ACE/MAG instrument team, the ACE Science Center, and the CDAWeb team at GSFC/SPDF. 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_H0_MFI Web Service to this product using the HAPI interface. CSV Please acknowledge the ACE/MAG instrument team, the ACE Science Center, and the CDAWeb team at GSFC/SPDF. spase://SMWG/Repository/ACE_SC Online Open ACE Science Center ftp area ftp://mussel.srl.caltech.edu/pub/ace/level2/mag/ In HDF via ftp from ACE Science Center HDF Please acknowledge the ACE/MAG instrument team and the ACE Science Center spase://SMWG/Repository/ACE_SC Online Open ACE Science Center https://izw1.caltech.edu/ACE/ASC/level2/lvl2DATA_MAG.html ACE/MAG L2 16-sec data with subset, plot, list functionalities from the ACE Science Center Text Please acknowledge the ACE/MAG instrument team and the ACE Science Center ACE MAG Level 2 Data, 16-second averages Level 2 5 spase://SMWG/Instrument/ACE/MAG MagneticField 1997-09-02T00:00:12Z -P2M PT16S Heliosphere.NearEarth The quality of ACE level 2 data is such that it is suitable for serious scientific study. However, to avoid confusion and misunderstanding, it is recommended that users consult with the appropriate ACE team members before publishing work derived from the data. The ACE team has worked hard to ensure that the level 2 data are free from errors, but the team cannot accept responsibility for erroneous data, or for misunderstandings about how the data may be used. This is especially true if the appropriate ACE team members are not consulted before publication. At the very least, preprints should be forwarded to the ACE team before publication. Time Epoch Number of milliseconds since CDF_EPOCH: 0000-01-01T00:00:00.000. Timestamp marks beginning of interval ms 1e-3>s 1996-01-01T00:00:00.000Z 2020-01-01T00:00:00.000Z -1.0E31 Temporal Time PB5 Time_PB5 Time of observation in year, day of year, and milliseconds. Timestamp marks beginning of interval 3 Year 1 year 1997 2020 -2147483648 Day of year 2 day 1 366 -2147483648 Elapsed milliseconds of day 3 msec 0 86401000 -2147483648 Temporal Bmagnitude Magnitude Magnetic field magnitude nT 1e-9>T 0.0 500.0 -1.0E31 Average Magnitude Magnetic B GSE BGSEc Magnetic field vector in GSE Cartesian coordinates (16 sec) nT 1e-9>T Cartesian GSE 3 Bx GSE Component.I 1 -65534.0 65534.0 -1.0E31 By GSE Component.J 2 -65534.0 65534.0 -1.0E31 Bz GSE Component.K 3 -65534.0 65534.0 -1.0E31 Vector Component.I Component.J Component.K Magnetic B GSM BGSM Magnetic field vector in GSM coordinates (16 sec) nT 1e-9>T Cartesian GSM 3 Bx GSM Component.I 1 -65534.0 65534.0 -1.0E31 By GSM Component.J 2 -65534.0 65534.0 -1.0E31 Bz GSM Component.K 3 -65534.0 65534.0 -1.0E31 Vector Component.I Component.J Component.K Magnetic B RMS dBrms RMS of magnetic field magnitude (16 sec period) nT 1e-9>T 0.0 10.0 -1.0E31 StandardDeviation Magnitude Magnetic Data Quality Flag Q_FLAG Data Quality Flag: 0 = good; 1 = S/C Maneuver and subsequent high-nutation period (~4 hr) 2 = Bad data/missing data 0 2 -2147483648 Other S/C position in GSE SC_pos_GSE ACE s/c position in GSE coordinates km 1e3>m Cartesian GSE 3 X GSE Component.I 1 -2000000.0 2000000.0 -1.0E31 Y GSE Component.J 2 -2000000.0 2000000.0 -1.0E31 Z GSE Component.K 3 -2000000.0 2000000.0 -1.0E31 Positional S/C position in GSM SC_pos_GSM ACE s/c position in GSM coordinates km 1e3>m Cartesian GSM 3 X GSM Component.I 1 -2000000.0 2000000.0 -1.0E31 Y GSM Component.J 2 -2000000.0 2000000.0 -1.0E31 Z GSM Component.K 3 -2000000.0 2000000.0 -1.0E31 Positional