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ACE SWICS 2.0 Solar Wind Protons 12-min Data

(2023). ACE SWICS 2.0 Solar Wind Protons 12-min Data. [Data set]. Space Physics Data Facility; California Institute of Technology. https://doi.org/10.48322/mfxn-cw77. Accessed on .

Note: Proper references, including or other formats, should include the "Accessed on date" to identify the version of the resource being cited in a given publication.

ResourceID
spase://NASA/NumericalData/ACE/SWICS/L2/PT12M

Description
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

Metadata Rights
CC0-1.0: Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions. The actual data/software may be subject to a different license.

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Details

Version:2.7.1

NumericalData

ResourceID
spase://NASA/NumericalData/ACE/SWICS/L2/PT12M
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
ACE SWICS 2.0 Solar Wind Protons 12-min Data
DOI
https://doi.org/10.48322/mfxn-cw77
ReleaseDate
2026-07-21 12:03:52Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 15:38:11Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2023-07-30 12:34:56.789Z
Note
Added DOI and PublicationInfo minted by LFB, metadata versioned up to SPASE 2.6.0, reviewed by LFB 20230727
RevisionEvent
ReleaseDate
2025-09-30 14:27:19Z
Note
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
RevisionEvent
ReleaseDate
2025-12-04 13:28:25Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-06-26 13:14:22Z
Note
Add 'Z' to RevisionEvent:ReleaseDate(s), PublicationDate, TemporalDescription:TimeSpan:StartDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:03:52Z
Note
Added HelioData InformationURL. JWL
Description
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
PublicationInfo
Authors
Gloeckler, George, M.; McGuire, Robert, E.
PublicationDate
2023-01-01 00:00:00Z
PublishedBy
Space Physics Data Facility; California Institute of Technology
Contacts
Role Person StartDate StopDate Note
1. PrincipalInvestigator spase://SMWG/Person/George.Gloeckler
2. GeneralContact spase://SMWG/Person/Robert.E.McGuire
3. MetadataContact spase://SMWG/Person/Lee.Frost.Bargatze

InformationURL
Name
Release notes for SWICS 2.0 level 2 data
URL
http://www.srl.caltech.edu/ACE/ASC/DATA/level2/ssprotons/swics_protons_release_notes.txt
Description
Additional details provided by the instrument team. All users of SWICS data should read these notes.
InformationURL
Name
HelioData
URL
https://helio.data.nasa.gov/dataset/ACE_SWICS_L2_PT12M
Description
The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.
PriorIDs
spase://VSPO/NumericalData/ACE/SWICS/L2/PT12M
AccessInformation
RepositoryID
spase://SMWG/Repository/ACE_SC
Availability
Online
AccessRights
Open
AccessURL
Name
ACE Science Center (ASC)
URL
http://www.srl.caltech.edu/ACE/ASC/level2/lvl2DATA_SWICS_PROTONS.html
Format
HDF
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
RightsList
Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products
AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=AC_H6_SWI&index=sp_phys
ProductKey
AC_H6_SWI
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/ace/swics/level_2_cdaweb/swi_h6/
Description
In CDF via ftp from CDAWeb
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/ace/swics/level_2_cdaweb/swi_h6/
Description
In CDF via HTTP from CDAWeb
Format
CDF
AccessDirectoryTemplate
https://cdaweb.gsfc.nasa.gov/pub/data/ace/swics/level_2_cdaweb/swi_h6/$Y
AccessFilenameTemplate
ac_h6_swi_$Y$m$d_$v.cdf
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb Programmatic Data Access
URL
https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/AC_H6_SWI/clientLibraryExample/
Style
WebService
ProductKey
AC_H6_SWI
Description
Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS.
Format
Binary
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
RightsList
Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products
AccessURL
Name
CDAWeb HAPI Server
URL
https://cdaweb.gsfc.nasa.gov/hapi
Style
HAPI
ProductKey
AC_H6_SWI
Description
Web Service to this product using the HAPI interface.
Format
CSV
ProviderProcessingLevel
CALIBRATED
InstrumentIDs
spase://SMWG/Instrument/ACE/SWICS
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
1998-01-29 00:07:03Z
RelativeStopDate
-P4M
Cadence
PT12M
ObservedRegion
Heliosphere.NearEarth
Parameter #1
Name
Epoch Time
ParameterKey
Epoch
Description
Number of milliseconds since the CDF epoch.
Cadence
PT12M
Units
ms
UnitsConversion
1e-3>s
ValidMin
01-Jan-1996 00:00:00.000
ValidMax
01-Jan-2020 00:00:00.000
FillValue
-1.0E31
Support
SupportQuantity
Temporal
Parameter #2
Name
Proton density
ParameterKey
nH
Description
nH is the number density of Protons in the solar wind in units of #/cm^3
Cadence
PT12M
Units
#/cm^3
ValidMin
0.0
ValidMax
200.0
FillValue
-1.0E31
Particle
ParticleType
Proton
Qualifier
Magnitude
ParticleQuantity
NumberDensity
Parameter #3
Name
Proton density error
ParameterKey
nH_err
Description
nH_err is the statistical uncertainty in the number density of Protons in the solar wind, in #/cm^3
Cadence
PT12M
Units
#/cm^3
ValidMin
0.0
ValidMax
200.0
FillValue
-1.0E31
Particle
ParticleType
Proton
Qualifier
Uncertainty
ParticleQuantity
NumberDensity
Parameter #4
Name
Solar Wind Proton speed
ParameterKey
vH
Description
vH is the mean Proton speed in the solar wind, in km/s.
Cadence
PT12M
Units
km/s
ValidMin
0.0
ValidMax
2000.0
FillValue
-1.0E31
Particle
ParticleType
Proton
Qualifier
Magnitude
ParticleQuantity
FlowSpeed
Parameter #5
Name
Solar Wind Proton Thermal speed
ParameterKey
vthH
Description
vthH is the thermal speed of Protons in the solar wind, in km/s
Cadence
PT12M
Units
km/s
ValidMin
0.0
ValidMax
2000.0
FillValue
-1.0E31
Particle
ParticleType
Proton
Qualifier
Magnitude
ParticleQuantity
ThermalSpeed
NASA Insignia
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SPDF ROR ID
SPDF re3data ID
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Last Updated: 2026-07-21