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Data Access
FTPS from SPDF (not with most browsers)
HTTPS from SPDF
CDAWeb
WebService:
CDAWeb Programmatic Data Access
HAPI: CDAWeb HAPI Server
ACE Electron, Proton, and Alpha Monitor (EPAM) Solar Wind Plasma Energetic Particle Fluxes, Key Parameter (K0), 5 min Data
var authors='Gold, R. E., Roelof, E. C., Krimigis, S., Haggerty, D., Armstrong, T., Manweiler, J. W., and Patterson, J. D.';
document.write(authors);
(2022).
ACE Electron, Proton, and Alpha Monitor (EPAM) Solar Wind Plasma Energetic Particle Fluxes, Key Parameter (K0), 5 min Data.
[Data set].
Space Physics Data Facility.
https://doi.org/10.48322/ghbm-qj24. Accessed on document.write(currentDateStr);.
Note: Proper references, including
Copy BibTeX Citation
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/EPAM/KeyParameter/PT5M
Description
ACE Browse Data are designed for monitoring large-scale Particle and Field Behavior and for selecting interesting Time Periods. The Data are automatically generated from the Spacecraft Data Stream using simple Algorithms provided by the Instrument Teams. It is not routinely checked for Accuracy and is subject to Revision. Use this Data at your own Risk, and consult with the appropriate Instrument Teams about citing it. EPAM Browse Data are not validated by the Experimenters and should not be used except for Preliminary Examination prior to detailed Studies. ACE Electron, Proton, and Alpha Monitor (EPAM) References: http://www.srl.caltech.edu/ACE/.
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/EPAM/KeyParameter/PT5M
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
ACE Electron, Proton, and Alpha Monitor (EPAM) Solar Wind Plasma Energetic Particle Fluxes, Key Parameter (K0), 5 min Data
DOI
https://doi.org/10.48322/ghbm-qj24
ReleaseDate
2025-12-04 13:28:12Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 15:38:11
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2022-07-25 12:34:56.789
Note
Added DOI and PublicationInfo by JMW 2022-06-02, updated two InformationURL URLs, metadata updated to SPASE 2.4.1, reviewed by LFB 20220724
RevisionEvent
ReleaseDate
2025-09-30 14:27:06Z
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 13:28:12Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
Description
ACE Browse Data are designed for monitoring large-scale Particle and Field Behavior and for selecting interesting Time Periods. The Data are automatically generated from the Spacecraft Data Stream using simple Algorithms provided by the Instrument Teams. It is not routinely checked for Accuracy and is subject to Revision. Use this Data at your own Risk, and consult with the appropriate Instrument Teams about citing it. EPAM Browse Data are not validated by the Experimenters and should not be used except for Preliminary Examination prior to detailed Studies. ACE Electron, Proton, and Alpha Monitor (EPAM) References: http://www.srl.caltech.edu/ACE/.
Acknowledgement
R. Gold, Please acknowledge the Principal Investigator, R. Gold of JHU Applied Physics Laboratory See the Rules of Use available from the ACE Science Center at: http://www.srl.caltech.edu/ace/.
PublicationInfo
Authors
Gold, R. E., Roelof, E. C., Krimigis, S., Haggerty, D., Armstrong, T., Manweiler, J. W., and Patterson, J. D.
PublicationDate
2022-04-27 12:17:00Z
PublishedBy
Space Physics Data Facility
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/Robert.E.Gold
2.
MetadataContact
spase://SMWG/Person/Robert.E.McGuire
3.
MetadataContact
spase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
ACE Science Center Home Page for Level 2 Data Release Notes
URL
https://izw1.caltech.edu/ACE/ASC/level2/index.html
Description
ACE Level 2 Data Release Notes Home Page
InformationURL
Name
ACE Science Center Home Page for Level 2 Rules of Use
URL
https://izw1.caltech.edu/ACE/ASC/level2/policy_lvl2.html
Description
ACE Level 2 Rules of Use Home Page
InformationURL
Name
ACE Electron, Proton, and Alpha Monitor (EPAM) Instrument Home Page at the Applied Physics Laboratory, Johns Hopkins University
URL
http://sd-www.jhuapl.edu/ACE/EPAM/
Description
ACE EPAM Instrument Home Page at APL/JHU
PriorIDs
spase://VSPO/NumericalData/ACE/EPAM/PT300S
spase://VSPO/NumericalData/P_ACE_HDR_EPAM_K0_5min
spase://VSPO/NumericalData/ACE/EPAM/KeyParameter/PT5M
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
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
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/ace/epam/level_2_cdaweb/epm_k0/
Description
Access to Data in CDF Format via ftp from SPDF
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/ace/epam/level_2_cdaweb/epm_k0/
Description
Access to Data in CDF Format via http from SPDF
AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=AC_K0_EPM&index=sp_phys
ProductKey
AC_K0_EPM
Description
Access to ASCII, CDF, and Plots via NASA/GSFC CDAWeb
Format
CDF
Encoding
None
AccessDirectoryTemplate
https://cdaweb.gsfc.nasa.gov/pub/data/ace/epam/level_2_cdaweb/epm_k0/$Y
AccessFilenameTemplate
ac_k0_epm_$Y$m$d_$v.cdf
Acknowledgement
R. Gold, Please acknowledge the Principal Investigator, R. Gold of JHU Applied Physics Laboratory See the Rules of Use available from the ACE Science Center at: http://www.srl.caltech.edu/ace/. Please acknowledge the Data Providers and CDAWeb when using these Data.
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_K0_EPM/clientLibraryExample/
Style
WebService
ProductKey
AC_K0_EPM
Description
Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS.
Format
Binary
Acknowledgement
R. Gold, Please acknowledge the Principal Investigator, R. Gold of JHU Applied Physics Laboratory See the Rules of Use available from the ACE Science Center at: http://www.srl.caltech.edu/ace/. Please acknowledge the Data Providers and CDAWeb when using these Data.
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
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_K0_EPM
Description
Web Service to this product using the HAPI interface.
Format
CSV
Acknowledgement
R. Gold, Please acknowledge the Principal Investigator, R. Gold of JHU Applied Physics Laboratory See the Rules of Use available from the ACE Science Center at: http://www.srl.caltech.edu/ace/. Please acknowledge the Data Providers and CDAWeb when using these Data.
ProviderProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/ACE/EPAM
MeasurementType
EnergeticParticles
TemporalDescription
TimeSpan
StartDate
2017-01-01 00:00:00.000
RelativeStopDate
-P7D
Note
The Data become available about one Week after Observation
Cadence
PT5M
ObservedRegion
Heliosphere
ObservedRegion
Heliosphere.Inner
ObservedRegion
Heliosphere.NearEarth
Parameter #1
Name
Epoch Time
ParameterKey
Epoch
Description
Epoch Time, Beginning of Interval
Caveats
This Parameter exhibits an increasing Monotonic Progression.
Cadence
PT5M
Units
ms
UnitsConversion
1.0e-3>s
RenderingHints
AxisLabel
Epoch
ValueFormat
E14.8
ScaleMin
6.2987652219904e+13
ScaleMax
6.3745034619904e+13
ScaleType
LinearScale
ValidMin
01-Jan-1996 00:00:00.000
ValidMax
01-Jan-2020 00:00:00.000
FillValue
-1.0e+31
Support
SupportQuantity
Temporal
Parameter #2
Name
Time PB5
Set
Time Series defined by using: EPOCH
ParameterKey
Time_PB5
Description
Time PB5, Time of Observation, Year, Day, and Milliseconds of Day
Caveats
This Parameter exhibits an increasing Monotonic Progression.
Cadence
PT5M
RenderingHints
ScaleType
LinearScale
Structure
Size
3
Element
Name
Year
Index
1
Units
a
ValidMin
1997
ValidMax
2020
RenderingHints
AxisLabel
year
ScaleMin
1997
ScaleMax
2020
Element
Name
Day of Year (Jan 1 = Day 1)
Index
2
Units
d
ValidMin
1
ValidMax
366
RenderingHints
AxisLabel
day
ScaleMin
1
ScaleMax
366
Element
Name
Elapsed milliseconds of day
Index
3
Units
ms
ValidMin
0
ValidMax
86400
RenderingHints
AxisLabel
msec
ScaleMin
0
ScaleMax
86400
FillValue
-2147483648
Support
SupportQuantity
Temporal
Parameter #3
Name
Proton Flux Intensity, Low Energy
Set
Time Series defined by using: EPOCH
ParameterKey
H_lo
Description
Proton Flux Intensity, 0.48 KeV to 0.97 MeV
Cadence
PT5M
Units
(cm^2 s sr MeV)^-1
UnitsConversion
6.24161e-19>(m^2 s sr J)^-1
RenderingHints
AxisLabel
H (0.48-0.97 MeV)
ValueFormat
E11.3
ScaleMin
0.0
ScaleMax
10000.0
ScaleType
LogScale
ValidMin
0.0
ValidMax
10000.0
FillValue
-1.0e+31
Particle
ParticleType
Proton
Qualifier
Scalar
ParticleQuantity
NumberFlux
AtomicNumber
1
Parameter #4
Name
Ion Flux Intensity, Very Low Energy
Set
Time Series defined by using: EPOCH
ParameterKey
Ion_very_lo
Description
Ion Flux Intensity, 47 KeV to 65 keV
Cadence
PT5M
Units
(cm^2 s sr MeV)^-1
UnitsConversion
6.24161e-19>(m^2 s sr J)^-1
RenderingHints
AxisLabel
Ion (47-65 keV)
ValueFormat
E11.3
ScaleMin
0.0
ScaleMax
100000.0
ScaleType
LogScale
ValidMin
0.0
ValidMax
100000.0
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Scalar
ParticleQuantity
NumberFlux
Parameter #5
Name
Ion Flux Intensity, Low Energy
Set
Time Series defined by using: EPOCH
ParameterKey
Ion_lo
Description
Ion Flux Intensity, 112 KeV to 187 keV
Cadence
PT5M
Units
(cm^2 s sr MeV)^-1
UnitsConversion
6.24161e-19>(m^2 s sr J)^-1
RenderingHints
AxisLabel
Ion (112-187 keV)
ValueFormat
E11.3
ScaleMin
0.0
ScaleMax
100000.0
ScaleType
LogScale
ValidMin
0.0
ValidMax
100000.0
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Scalar
ParticleQuantity
NumberFlux
Parameter #6
Name
Ion Flux Intensity, Mid Energy
Set
Time Series defined by using: EPOCH
ParameterKey
Ion_mid
Description
Ion Flux Intensity, 310 KeV to 580 keV
Cadence
PT5M
Units
(cm^2 s sr MeV)^-1
UnitsConversion
6.24161e-19>(m^2 s sr J)^-1
RenderingHints
AxisLabel
Ion (310-580 keV)
ValueFormat
E11.3
ScaleMin
0.0
ScaleMax
10000.0
ScaleType
LogScale
ValidMin
0.0
ValidMax
10000.0
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Scalar
ParticleQuantity
NumberFlux
Parameter #7
Name
Ion Flux Intensity, High Energy
Set
Time Series defined by using: EPOCH
ParameterKey
Ion_hi
Description
Ion Flux Intensity, 1060 KeV to 1910 keV
Cadence
PT5M
Units
(cm^2 s sr MeV)^-1
UnitsConversion
6.24161e-19>(m^2 s sr J)^-1
RenderingHints
AxisLabel
Ion (1060-1910 keV)
ValueFormat
E11.3
ScaleMin
0.0
ScaleMax
10000.0
ScaleType
LogScale
ValidMin
0.0
ValidMax
10000.0
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Scalar
ParticleQuantity
NumberFlux
Parameter #8
Name
Electron Flux Intensity, Low Energy
Set
Time Series defined by using: EPOCH
ParameterKey
Electron_lo
Description
Electron Flux Intensity, 38 KeV to 53 keV
Cadence
PT5M
Units
(cm^2 s sr MeV)^-1
UnitsConversion
6.24161e-19>(m^2 s sr J)^-1
RenderingHints
AxisLabel
Electron (38-53 keV)
ValueFormat
E11.3
ScaleMin
0.0
ScaleMax
1.0e+07
ScaleType
LogScale
ValidMin
0.0
ValidMax
1.0e+07
FillValue
-1.0e+31
Particle
ParticleType
Electron
Qualifier
Scalar
ParticleQuantity
NumberFlux
Parameter #9
Name
Electron Flux Intensity, High Energy
Set
Time Series defined by using: EPOCH
ParameterKey
Electron_hi
Description
Electron Flux Intensity, 175 KeV to 315 keV
Cadence
PT5M
Units
(cm^2 s sr MeV)^-1
UnitsConversion
6.24161e-19>(m^2 s sr J)^-1
RenderingHints
AxisLabel
Electron (175-315 keV)
ValueFormat
E11.3
ScaleMin
0.0
ScaleMax
1.0e+06
ScaleType
LogScale
ValidMin
0.0
ValidMax
1.0e+06
FillValue
-1.0e+31
Particle
ParticleType
Electron
Qualifier
Scalar
ParticleQuantity
NumberFlux
Parameter #10
Name
Livetime
Set
Time Series defined by using: EPOCH
ParameterKey
livetime
Description
Livetime (5 min)
Caveats
Livetime Values equal to Zero denote Ignore Data
Cadence
PT5M
RenderingHints
AxisLabel
Livetime
ValueFormat
I4
ScaleMin
0
ScaleMax
3600
ScaleType
LinearScale
ValidMin
0
ValidMax
360
FillValue
-2147483648
Support
SupportQuantity
Other