<_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/ac_h2_mfi_00000000_v01.json (from all.xml) spase://NASA/NumericalData/ACE/MAG/L2/PT1H <_ResourceID>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/ResourceID.json H2 - ACE Magnetic Field 1-Hour Level 2 Data <_ResourceName>Source: Master/CDFglobalAttributes/Logical_source_description AC_H2_MFI <_AlternateName>Source: Master/CDFglobalAttributes/Logical_source MAG - ACE Magnetic Field ExperimentReferences: http://www.srl.caltech.edu/ACE/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 membersbefore 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. <_Description>Source: Master/CDFglobalAttributes/TEXT <_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/ Please acknowledge the Principal Investigator, N. Ness of Bartol Research Institute ACE Science Center Home Page for Level 2 Data Release Notes https://izw1.caltech.edu/ACE/ASC/level2/index.html ACE Level 2 Data Release Notes Home Page <_Note>URL also in all.xml, master. Using InformationURL.json. Rules of use, and caveats https://izw1.caltech.edu/ACE/ASC/level2/policy_lvl2.html ACE level 2 data rules of use, and caveats <_Note>Source: InformationURL.json ACE Magnetic Field (MAG) Instrument Home Page at the University of New Hampshire http://www-ssg.sr.unh.edu/mag/ACE.html ACE MAG Instrument Home Page at UNH <_Note>Source: InformationURL.json ACE> Magnetometer Parameters <_Caveats>Source: Master/CDFglobalAttributes/Rules_of_use https://doi.org/10.48322/fh85-fj47 <_DOI>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/DOI.json <_AccessInformation>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/AccessInformation.json 1997-09-02T00:00:00Z 2026-06-11T23:00:00Z <_TemporalDescription>Generated from all.xml/@timerange_start and all.xml/@timerange_stop PT1H <_Cadence>Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/ace/mag/level_2_cdaweb/mfi_h2/1997/ac_h2_mfi_19970902_v04.cdf. The most common cadence, 3600000 [ms] = PT1H, occurred for all 23 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 See the rules of use available from the ACE Science Center at: http://www.srl.caltech.edu/ACE/ASC/level2/policy_lvl2.html spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: N. Ness at Bartol Research Institute HTTPS from SPDF https://cdaweb.gsfc.nasa.gov/pub/data/ace/mag/level_2_cdaweb/mfi_h2 In CDF via HTTP from CDAWeb ac_h2_mfi_%Y%m%d_%Q.cdf %Y AC_H2_MFI CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: N. Ness at Bartol Research Institute FTPS from SPDF ftps://cdaweb.gsfc.nasa.gov/pub/data/ace/mag/level_2_cdaweb/mfi_h2 In CDF via HTTP from CDAWeb ac_h2_mfi_%Y%m%d_%Q.cdf %Y AC_H2_MFI CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: N. Ness at Bartol Research Institute 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. AC_H2_MFI 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: N. Ness at Bartol Research Institute CDAWeb Web Service user interface https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?index=sp_phys&dataset=AC_H2_MFI AC_H2_MFI 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: N. Ness at Bartol Research Institute CDAWeb Python Script https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/AC_H2_MFI/clientLibraryExample/ AC_H2_MFI 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: N. Ness at Bartol Research Institute 4D Orbit Viewer https://sscweb.gsfc.nasa.gov/4dorbit/?sc=AC_H2_MFI AC_H2_MFI 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: N. Ness at Bartol Research Institute CDAWeb HAPI Server https://hapi-server.org/servers/#server=CDAWeb&dataset=AC_H2_MFI AC_H2_MFI 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: N. Ness at Bartol Research Institute CDAWeb HAPI Script in Multiple Languages https://hapi-server.org/servers/#server=CDAWeb&dataset=AC_H2_MFI&return=script AC_H2_MFI 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: N. Ness at Bartol Research Institute HAPI visualizations https://hapi-server.org/plot/?server=https://cdaweb.gsfc.nasa.gov/hapi&dataset=AC_H2_MFI&format=gallery AC_H2_MFI Web Service that generates plots. See https://hapi-server.org/plot/ for the API. PNG PDF SVG Advanced Composition Explorer (from all.xml/observatory/description/@short) ACE Magnetic Field Instrument (from all.xml/instrument/description/@short) Space Physics (from Master/CDFglobalAttributes/Discipline) Interplanetary Studies (from Master/CDFglobalAttributes/Discipline) AC (from Master/CDFglobalAttributes/Source_name) Advanced Composition Explorer (from Master/CDFglobalAttributes/Source_name) H2 (from Master/CDFglobalAttributes/Data_type) 1-Hr Level 2 Data (from Master/CDFglobalAttributes/Data_type) MAG (from all.xml/instrument/@ID) Heliosphere.Inner Heliosphere.NearEarth Heliosphere spase://SMWG/Instrument/ACE/Ephemeris spase://SMWG/Instrument/ACE/MAG Ephemeris MagneticField Time Epoch CATDESC: 'Time, beginning of interval'. 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.' ms Scalar Temporal Time PB5 Time_PB5 Master CDF CATDESC: 'Time of observation in Year, Day, & milliseconds (1 hr)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' -2147483648 3 year day msec B-field magnitude Magnitude Master CDF CATDESC: 'B-field magnitude'. Master CDF VAR_NOTES: ' '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 Mag Field vector, GSE coord BGSEc Master CDF CATDESC: 'Magnetic Field Vector in GSE Cartesian coordinates (1 hr)'. Master CDF VAR_NOTES: ' '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 3 Mag field vector, GSM coord BGSM Master CDF CATDESC: 'Magnetic field vector in GSM coordinates (1 hr)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' nT -1e+31 3 Quality Flag: Data Q_FLAG Master CDF CATDESC: 'Data Quality Flag'. Master CDF VAR_NOTES: 'Data Quality Flag: 0 = good; 1 = S/C Maneuver & subsequent high-nutation period (~4 hr) 2 = Bad data/missing data'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' (0=good) -2147483648 S/C position in GSE SC_pos_GSE Master CDF CATDESC: 'ACE s/c position, 3 comp. in GSE coord.'. Master CDF VAR_NOTES: ' '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' km -1e+31 3 S/C position in GSM SC_pos_GSM Master CDF CATDESC: 'ACE s/c position, 3 comp. in GSM coord.'. Master CDF VAR_NOTES: ' '. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is Epoch.' km -1e+31 3