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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
SAMPEX Data Center
SAMPEX Polar-Cap-Averaged Fluxes, all instruments
var authors='Mason, Glenn, M.; Mewaldt, Richard, A.';
document.write(authors);
(2023).
SAMPEX Polar-Cap-Averaged Fluxes, all instruments.
[Data set].
Space Physics Data Facility; California Institute of Technology.
https://doi.org/10.48322/m7w8-8d83. Accessed on document.write(currentDateStr);.
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ResourceID
spase://NASA/NumericalData/SAMPEX/PCA/PT48M
Description
This data set contains 17 differential fluxes of protons (mainly), helium ions, Z.GE.6 ions, and electrons, plus one integral flux of protons and electrons, as averaged over polar cap passes of the SAMPEX spacecraft. A polar cap pass covers the time poleward of geomagnetic latitude 70 deg. (Not all orbits have two polar cap passes.). For any given species, the fluxes typically come from more than one of the sensors (LICA, HILT, MAST, PET). Hence the inclusion of all instruments' data in each single record. Differential fluxes are those for (mainly) protons (Z.GE.1 channels at 5-12 and 19-27 MeV/n), helium ions (0.50-6.6, 4-9, 8-15, 9-38 MeV/n), Z.GE.6 ions (0.49-8.3, 8-42, 19.3-22.8, 22.8-31.0, 31.0-51.7, 41-220, 51.7-76.2, 76.2-113, 113-156 MeV/n), and electrons (1.5-6.0 MeV from PET only). One LICA channel measured integral fluxes of ions .GT. 0.8 MeV/n plus electrons .GT. 0.6 MeV). Data available for each polar cap pass are time tags of the begin and end points of the averaging interval, the fluxes, statistical uncertainties in the fluxes, instrument-specific flags, and a flag indicating a north or south polar cap pass. Data are organized in two different ways. Monthly ~500-KB ASCII files with records organized by instrument are available from the SAMPEX Data Center at Caltech and from nssdcftp at GSFC/SPDF, while monthly ~260 KB CDF-formatted files with records organized by species are available from the ftp area underlying CDAWeb. The parameter level information given below in this descriptor corresponds to the CDAWeb organization of data. Format information for the ASCII version is given in the Information URL of this descriptor.
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/SAMPEX/PCA/PT48M
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
SAMPEX Polar-Cap-Averaged Fluxes, all instruments
DOI
https://doi.org/10.48322/m7w8-8d83
ReleaseDate
2025-12-04 13:31:23Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 15:38:11
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2023-07-30 12:34:56.789
Note
Added DOI and PublicationInfo minted by LFB, metadata versioned up to SPASE 2.6.0, reviewed by LFB 20230727
RevisionEvent
ReleaseDate
2025-10-03 10:49:10Z
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 13:31:23Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
Description
This data set contains 17 differential fluxes of protons (mainly), helium ions, Z.GE.6 ions, and electrons, plus one integral flux of protons and electrons, as averaged over polar cap passes of the SAMPEX spacecraft. A polar cap pass covers the time poleward of geomagnetic latitude 70 deg. (Not all orbits have two polar cap passes.). For any given species, the fluxes typically come from more than one of the sensors (LICA, HILT, MAST, PET). Hence the inclusion of all instruments' data in each single record. Differential fluxes are those for (mainly) protons (Z.GE.1 channels at 5-12 and 19-27 MeV/n), helium ions (0.50-6.6, 4-9, 8-15, 9-38 MeV/n), Z.GE.6 ions (0.49-8.3, 8-42, 19.3-22.8, 22.8-31.0, 31.0-51.7, 41-220, 51.7-76.2, 76.2-113, 113-156 MeV/n), and electrons (1.5-6.0 MeV from PET only). One LICA channel measured integral fluxes of ions .GT. 0.8 MeV/n plus electrons .GT. 0.6 MeV). Data available for each polar cap pass are time tags of the begin and end points of the averaging interval, the fluxes, statistical uncertainties in the fluxes, instrument-specific flags, and a flag indicating a north or south polar cap pass. Data are organized in two different ways. Monthly ~500-KB ASCII files with records organized by instrument are available from the SAMPEX Data Center at Caltech and from nssdcftp at GSFC/SPDF, while monthly ~260 KB CDF-formatted files with records organized by species are available from the ftp area underlying CDAWeb. The parameter level information given below in this descriptor corresponds to the CDAWeb organization of data. Format information for the ASCII version is given in the Information URL of this descriptor.
PublicationInfo
Authors
Mason, Glenn, M.; Mewaldt, Richard, A.
PublicationDate
2023-01-01 00:00:00
PublishedBy
Space Physics Data Facility; California Institute of Technology
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/Glenn.M.Mason
2.
GeneralContact
spase://SMWG/Person/Richard.A.Mewaldt
3.
MetadataContact
spase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
Data descriptive text at Caltech
URL
http://www.srl.caltech.edu/sampex/DataCenter/docs/NSSDC_Level2_doc_v1-3.pdf
Description
Extensive PDF document prepared by M. Lennard, J. Mazur, and G. Mason originally in 1996 and most recently updated in 2007 to describe the many NSSDC-resident SAMPEX data sets, including the polar cap averaged fluxes. This document also identifies a series of mission and instrument papers at IEEE Transactions on Geoscience and Remote Sensing, Vol. 31, No. 3, May 1993
PriorIDs
spase://VEPO/NumericalData/SAMPEX/PCA/PT48M
spase://VSPO/NumericalData/SAMPEX/PCA/PT48M
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
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/sampex/
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/sampex/
Description
In CDF via HTTP from CDAWeb
Format
CDF
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=SX_K0_POF&index=sp_phys
ProductKey
SX_K0_POF
Description
Plots, lists and files from CDAWeb.Name of the data resource:SX_K0_POF
Format
Text
AccessDirectoryTemplate
https://cdaweb.gsfc.nasa.gov/pub/data/sampex/combined_cdaweb/pof/$Y
AccessFilenameTemplate
sx_k0_pof_$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/SX_K0_POF/clientLibraryExample/
Style
WebService
ProductKey
SX_K0_POF
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
SX_K0_POF
Description
Web Service to this product using the HAPI interface.
Format
CSV
AccessInformation
RepositoryID
spase://SMWG/Repository/SAMPEX_DC
Availability
Online
AccessRights
Open
AccessURL
Name
SAMPEX Data Center
URL
http://www.srl.caltech.edu/sampex/DataCenter/DATA/polarcap/flux_polarcap_avgd_ascii/data/
Description
In ASCII via ftp from SDC
Format
Text
ProviderProcessingLevel
CALIBRATED
InstrumentIDs
spase://SMWG/Instrument/SAMPEX/MAST
spase://SMWG/Instrument/SAMPEX/HILT
spase://SMWG/Instrument/SAMPEX/PET
spase://SMWG/Instrument/SAMPEX/LICA
MeasurementType
EnergeticParticles
MeasurementType
IonComposition
TemporalDescription
TimeSpan
StartDate
1992-07-06 00:00:00
StopDate
2004-06-30 23:59:59
Cadence
PT48M
ObservedRegion
Earth.Magnetosphere
Parameter #1
Name
Polar cap entry time
ParameterKey
entry_iso_time
Description
Time of entry into polar cap and of start of averaging of fluxes, expressed in ISO time format (YYYY_MM_DDTHH:MM:SS.SZ)
Caveats
Not every orbit reached poleward of 70 deg geomagnetic
Cadence
PT48M
Support
SupportQuantity
Temporal
Parameter #2
Name
Polar cap exit time
ParameterKey
exit_iso_time
Description
Time of exit from polar cap and of end of averaging of fluxes, expressed in ISO time format (YYYY_MM_DDTHH:MM:SS.SZ)
Caveats
Not every orbit reached poleward of 70 deg geomagnetic
Cadence
PT48M
Support
SupportQuantity
Temporal
Parameter #3
Name
Polar cap flag
ParameterKey
Polarcap_ID
Description
Takes value 0 for south pole pass, 1 for north pole pass
Cadence
PT48M
Support
SupportQuantity
Positional
Parameter #4
Name
LICA flags
ParameterKey
lica_flag
Description
Four flags associated with the LICA instrument. See Information URL given above for meanings of flags and their values.
Cadence
PT48M
Structure
Size
4
Description
The 4 LICA flags
Support
SupportQuantity
Other
Parameter #5
Name
HILT flags
ParameterKey
HILT_flag
Description
Six flags associated with the HILT instrument. See Information URL given above for meanings of flags and their values.
Cadence
PT48M
Structure
Size
6
Description
The 6 HILT flags
Support
SupportQuantity
Other
Parameter #6
Name
MAST flags
ParameterKey
MAST_flag
Description
Three flags associated with the MAST instrument. See Information URL given above for meanings of flags and their values.
Cadence
PT48M
Structure
Size
3
Description
The 3 MAST flags
Support
SupportQuantity
Other
Parameter #7
Name
PET flags
ParameterKey
PET_flag
Description
Three flags associated with the PET instrument. See Information URL given above for meanings of flags and their values.
Cadence
PT48M
Structure
Size
3
Description
The 3 PET flags
Support
SupportQuantity
Other
Parameter #8
Name
Fluxes of Z.GE.6 ions
ParameterKey
zGT2_DID_FLX
Description
Polar-cap-averaged fluxes of Z.GE.6 ions in 9 energy bins listed above, from LICA, HILT and MAST instruments. We note a discrepancy between CDAWeb's use of "Z.GT.2" and the Project's use of "Z.GE.6" for these fluxes. See Appendix 7 of the document at the above referenced Information URL.
Cadence
PT48M
Units
1/sec-cm**2-ster-MeV/n
Structure
Size
9
Description
The 9 Z.GE.6 fluxes
FillValue
-1.0E+31
Particle
ParticleType
Ion
Qualifier
Average
ParticleQuantity
NumberFlux
Parameter #9
Name
Fluxes of helium ions
ParameterKey
He_dif_flux
Description
Polar-cap-averaged fluxes of helium ions in 4 energy bins listed above, from LICA, HILT and MAST instruments
Cadence
PT48M
Units
1/sec-cm**2-ster-MeV/n
Structure
Size
4
Description
The 4 Helium ion fluxes
FillValue
-1.0E+31
Particle
ParticleType
AlphaParticle
Qualifier
Average
ParticleQuantity
NumberFlux
Parameter #10
Name
Fluxes of protons
ParameterKey
Prot_Dif_Flux
Description
Polar-cap-averaged fluxes of protons in 2 energy bins listed above, from MAST and PET instruments. These are actually Z.GE.1 measurements.
Cadence
PT48M
Units
1/sec-cm**2-ster-MeV/n
Structure
Size
2
Description
The 2 proton fluxes
FillValue
-1.0E+31
Particle
ParticleType
Proton
Qualifier
Average
ParticleQuantity
NumberFlux
Parameter #11
Name
Fluxes of electrons
ParameterKey
Elect_Dif_Flux
Description
Polar-cap-averaged fluxes of electrons in 2 energy bins listed above, from the PET instrument.
Cadence
PT48M
Units
1/sec-cm**2-ster-MeV
Structure
Size
2
Description
The 2 electron fluxes
FillValue
-1.0E+31
Particle
ParticleType
Electron
Qualifier
Average
ParticleQuantity
NumberFlux
Parameter #12
Name
Integral fluxes of ions and electrons
ParameterKey
Int_Flux
Description
Polar-cap-averaged integral fluxes, mainly of protons above 0.8 MeV and electrons above 0.6 MeV, from LICA
Cadence
PT48M
Units
1/sec-cm**2-ster
FillValue
-1.0E+31
Particle
ParticleType
Proton
ParticleType
Electron
Qualifier
Average
ParticleQuantity
NumberFlux
Parameter #13
Name
Statistical uncertainites in fluxes of Z.GE.6 ions
ParameterKey
zGT2_FLX_SIG
Description
Statistical uncertainites in polar-cap-averaged fluxes of Z.GE.6 ions in 9 energy bins listed above, from LICA, HILT and MAST instruments
Cadence
PT48M
Units
1/sec-cm**2-ster-MeV/n
Structure
Size
9
Description
Uncertainties in the 9 Z.GE.6 fluxes
FillValue
-1.0E+31
Particle
ParticleType
Ion
Qualifier
StandardDeviation
ParticleQuantity
NumberFlux
Parameter #14
Name
Statistical uncertainites in fluxes of helium ions
ParameterKey
He_flx_sigma
Description
Statistical uncertainites in polar-cap-averaged fluxes of helium ions in 4 energy bins listed above, from LICA, HILT and MAST instruments
Cadence
PT48M
Units
1/sec-cm**2-ster-MeV/n
Structure
Size
4
Description
Uncertainties in the 4 helium fluxes
FillValue
-1.0E+31
Particle
ParticleType
AlphaParticle
Qualifier
StandardDeviation
ParticleQuantity
NumberFlux
Parameter #15
Name
Statistical uncertainites in fluxes of protons
ParameterKey
Prot_Flux_Sigma
Description
Statistical uncertainites in polar-cap-averaged fluxes of protons in 2 energy bins listed above, from MAST and PET instruments
Cadence
PT48M
Units
1/sec-cm**2-ster-MeV/n
Structure
Size
2
Description
Uncertainties in the 2 proton fluxes
FillValue
-1.0E+31
Particle
ParticleType
Proton
Qualifier
StandardDeviation
ParticleQuantity
NumberFlux
Parameter #16
Name
Statistical uncertainites in fluxes of electrons
ParameterKey
Elect_Flx_Sigma
Description
Statistical uncertainites in polar-cap-averaged fluxes of electrons in 2 energy bins listed above, from PET instrument
Cadence
PT48M
Units
1/sec-cm**2-ster-MeV
Structure
Size
2
Description
Uncertainties in the 2 electron fluxes
FillValue
-1.0E+31
Particle
ParticleType
Electron
Qualifier
StandardDeviation
ParticleQuantity
NumberFlux
Parameter #17
Name
Statistical uncertainties in ntegral fluxes of ions and electrons
ParameterKey
Int_Flux_sigma
Description
Statistical uncertainties in polar-cap-averaged integral fluxes, mainly of protons above 0.8 MeV and electrons above 0.6 MeV, from LICA
Cadence
PT48M
Units
1/sec-cm**2-ster
FillValue
-1.0E+31
Particle
ParticleType
Proton
ParticleType
Electron
Qualifier
StandardDeviation
ParticleQuantity
NumberFlux