<_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/imap_swapi_l3a_proton-sw_00000000_v01.json (from all.xml) <_ResourceID>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/ResourceID.json SWAPI Instrument Proton Solar Wind Parameters <_ResourceName>Source: Master/CDFglobalAttributes/Logical_source_description imap_swapi_l3a_proton-sw <_AlternateName>Source: Master/CDFglobalAttributes/Logical_source The Solar Wind and Pickup Ion (SWAPI) instrument onboard the Interstellar Mapping and Acceleration Probe (IMAP) is a top-hat electrostatic analyzer designed to measure energy-per-charge distributions of solar wind protons (H+), alpha particles (He++), and interstellar pickup ions (PUIs; combined H+ and He+) across a range of 0.1 to 20 keV/q. See https://imap.princeton.edu/spacecraft/instruments/solar-wind-and-pickup-ions-swapi for more details. The proton parameters are obtained by fitting a Maxwellian distribution to the measured coincidence rates using forward modeling, fully accounting for the 3D instrument response and spacecraft spin. <_Description>Source: Master/CDFglobalAttributes/TEXT Users should acknowledge the sources of data used in all publications, presentations, and reports using an appropriate DOI. Appropriate acknowledgement to institutions, personnel, and funding agencies should be given, including acknowledging the IMAP Mission Principal Investigator, Prof. David J. McComas of Princeton University (Contract #80GSFC19C0027). IMAP Rules-of-the-Road for data usage can be found in the IMAP CMAD. <_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/ https://imap.princeton.edu/ IMAP The Interstellar Mapping and Acceleration Probe <_Note>URL also in all.xml. Using master. https://link.springer.com/collections/djacjcecei IMAP Mission and Science Instruments Special Paper Collection <_Note>URL also in all.xml. Using master. https://spdf.gsfc.nasa.gov/pub/data/imap/documents/cmad/ IMAP Calibration and Measurement Algorithms Document (CMAD) <_Note>URL also in all.xml. Using master. All IMAP data products are publicly released and citable for use in publications. Please consult the IMAP team publications and personnel for further details on production, processing, and usage of these data. <_Caveats>Source: Master/CDFglobalAttributes/Rules_of_use <_DOI>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/DOI.json <_AccessInformation>Source: https://github.com/rweigel/cdawmeta-spase/blob/main/AccessInformation.json 2025-11-08T16:44:03Z 2026-04-30T23:59:25Z <_TemporalDescription>Generated from all.xml/@timerange_start and all.xml/@timerange_stop PT1M <_Cadence>Counts based on variable 'epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/imap/swapi/l3a/proton-sw/2026/imap_swapi_l3a_proton-sw_20260428_v001.0029.cdf. The most common cadence, 60000000000 [ns] = PT1M, occurred for 94.7880% of the 1364 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 spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: Prof. David J. McComas at Princeton University HTTPS from SPDF https://cdaweb.gsfc.nasa.gov/pub/data/imap/swapi/l3a/proton-sw In CDF via HTTP from CDAWeb imap_swapi_l3a_proton-sw_%Y%m%d_%Q.cdf %Y IMAP_SWAPI_L3A_PROTON-SW CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: Prof. David J. McComas at Princeton University FTPS from SPDF ftps://cdaweb.gsfc.nasa.gov/pub/data/imap/swapi/l3a/proton-sw In CDF via HTTP from CDAWeb imap_swapi_l3a_proton-sw_%Y%m%d_%Q.cdf %Y IMAP_SWAPI_L3A_PROTON-SW CDF spase://SMWG/Repository/NASA/GSFC/SPDF Online Open SPDF/CDAWeb. Please also acknowledge the data producer: Prof. David J. McComas at Princeton University 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. IMAP_SWAPI_L3A_PROTON-SW 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: Prof. David J. McComas at Princeton University CDAWeb Web Service user interface https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?index=sp_phys&dataset=IMAP_SWAPI_L3A_PROTON-SW IMAP_SWAPI_L3A_PROTON-SW 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: Prof. David J. McComas at Princeton University CDAWeb Python Script https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/IMAP_SWAPI_L3A_PROTON-SW/clientLibraryExample/ IMAP_SWAPI_L3A_PROTON-SW 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: Prof. David J. McComas at Princeton University 4D Orbit Viewer https://sscweb.gsfc.nasa.gov/4dorbit/?sc=IMAP_SWAPI_L3A_PROTON-SW IMAP_SWAPI_L3A_PROTON-SW 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: Prof. David J. McComas at Princeton University CDAWeb HAPI Server https://hapi-server.org/servers/#server=CDAWeb&dataset=IMAP_SWAPI_L3A_PROTON-SW IMAP_SWAPI_L3A_PROTON-SW 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: Prof. David J. McComas at Princeton University CDAWeb HAPI Script in Multiple Languages https://hapi-server.org/servers/#server=CDAWeb&dataset=IMAP_SWAPI_L3A_PROTON-SW&return=script IMAP_SWAPI_L3A_PROTON-SW 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: Prof. David J. McComas at Princeton University HAPI visualizations https://hapi-server.org/plot/?server=https://cdaweb.gsfc.nasa.gov/hapi&dataset=IMAP_SWAPI_L3A_PROTON-SW&format=gallery IMAP_SWAPI_L3A_PROTON-SW Web Service that generates plots. See https://hapi-server.org/plot/ for the API. PNG PDF SVG Interstellar Mapping and Acceleration Probe (from all.xml/observatory/description/@short) The Solar Wind and Pickup Ion (from all.xml/instrument/description/@short) Solar Physics (from Master/CDFglobalAttributes/Discipline) Heliospheric Physics (from Master/CDFglobalAttributes/Discipline) IMAP (from Master/CDFglobalAttributes/Source_name) Interstellar Mapping and Acceleration Probe (from Master/CDFglobalAttributes/Source_name) L3a_PROTON-SW (from Master/CDFglobalAttributes/Data_type) Level-3a Proton Solar Wind (from Master/CDFglobalAttributes/Data_type) SWAPI (from all.xml/instrument/@ID) Epoch epoch CATDESC: 'Center-of-window time, number of nanoseconds since J2000 with leap seconds included'. 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.' ns Scalar Temporal Proton Solar Wind Speed proton_sw_speed Master CDF CATDESC: 'Magnitude of the bulk velocity vector of the solar wind proton population (spacecraft frame)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is epoch.' km/s -1e+31 Proton Solar Wind Speed Uncertainty proton_sw_speed_uncert Master CDF CATDESC: '1-sigma standard error'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is epoch.' km/s -1e+31 Proton Solar Wind Speed (Sun Frame) proton_sw_speed_sun Master CDF CATDESC: 'Magnitude of the bulk velocity vector of the solar wind proton population (Sun frame)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is epoch.' km/s -1e+31 Proton Solar Wind Speed Uncertainty (Sun Frame) proton_sw_speed_sun_uncert Master CDF CATDESC: '1-sigma standard error'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is epoch.' km/s -1e+31 Epoch Delta epoch_delta Master CDF CATDESC: 'Half-width of the time interval represented by each record'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is epoch.' ns -9223372036854775808 Proton Solar Wind Temperature proton_sw_temperature Master CDF CATDESC: 'Scalar temperature of the solar wind proton population'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is epoch.' K -1e+31 Proton Solar Wind Temperature Uncertainty proton_sw_temperature_uncert Master CDF CATDESC: '1-sigma standard error'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is epoch.' K -1e+31 Proton Solar Wind Density proton_sw_density Master CDF CATDESC: 'Number density of the solar wind proton population'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is epoch.' cm^-3 -1e+31 Proton Solar Wind Density Uncertainty proton_sw_density_uncert Master CDF CATDESC: '1-sigma standard error'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is epoch.' cm^-3 -1e+31 Proton Solar Wind Velocity (RTN, Sun Frame) proton_sw_velocity_rtn_sun Master CDF CATDESC: 'Solar wind proton bulk velocity vector in RTN coordinates (Sun frame)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is epoch.' km/s -1e+31 3 Proton Solar Wind Velocity (RTN) proton_sw_velocity_rtn Master CDF CATDESC: 'Solar wind proton bulk velocity vector in RTN coordinates (spacecraft frame)'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is epoch.' km/s -1e+31 3 Proton Solar Wind Velocity Covariance (RTN) proton_sw_velocity_rtn_covariance Master CDF CATDESC: 'Covariance matrix in RTN coordinates (frame-independent), with standard errors given by the square root of the diagonal'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is epoch.' km^2/s^2 -1e+31 3 3 Proton Solar Wind Velocity Uncertainty (RTN) proton_sw_velocity_rtn_uncert Master CDF CATDESC: '1-sigma standard error'. Master CDF VAR_NOTES: ''. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is epoch.' km/s -1e+31 3 Quality Flags for SWAPI L3a swp_flags Master CDF CATDESC: 'Quality flags for SWAPI L3a (caution required if nonzero)'. Master CDF VAR_NOTES: 'Each bit corresponds to a specific potential concern. See release notes for details. Bit 2: Bad fit: fitting resulted in invalid values or large residuals. Bit 3: Fit error: fit failed to complete. Bit 4: preliminary MAG L1D was used for acquiring the magnetic field direction instead of the nominal MAG L2 product. All other bits are reserved.'. Notes not in Master CDF: 'The time index (the ISTP DEPEND_0 variable) for this parameter is epoch.' 0: okay; nonzero: caution 65535