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Pioneer 11 Cosmic-Ray Telescope (CRT) 6-hr fluxes and rates

(2025). Pioneer 11 Cosmic-Ray Telescope (CRT) 6-hr fluxes and rates [Data set]. Space Physics Data Facility.

ResourceID
spase://NASA/NumericalData/Pioneer11/CRT/PT6H

Description

This data set has eight 6-hour fluxes (3.45-5.15, 30.55-56.47 and 120.7-227.3 MeV protons, 3.44-4.97, 10.03-21.7, 30.67-56.7 and 112.7-413 MeV/n alpha particles, and 2-6 MeV electrons), 28 count rates, and Poisson uncertainties in the fluxes and rates, as determined from the Cosmic Ray Telescope (CRT) on the Pioneer 11 spacecraft. Data are in annual files with consistent end-of-record marks. Spacecraft position data are not given in the data records but are accessible from Helioweb at http://cohoweb.gsfc.nasa.gov/helios/heli.html

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Version:2.7.1

MetadataRightsList

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 SPASE metadata descriptions

Version:2.7.1

NumericalData

ResourceID
spase://NASA/NumericalData/Pioneer11/CRT/PT6H
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Pioneer 11 Cosmic-Ray Telescope (CRT) 6-hr fluxes and rates
ReleaseDate
2025-12-04 13:30:55Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-03-11 18:39:11Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-11-14 16:02:53Z
Note
Added PublicationInfo. Added ResourceType and NamingAuthority. ZCB
RevisionEvent
ReleaseDate
2025-12-04 13:30:55Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
Description

This data set has eight 6-hour fluxes (3.45-5.15, 30.55-56.47 and 120.7-227.3 MeV protons, 3.44-4.97, 10.03-21.7, 30.67-56.7 and 112.7-413 MeV/n alpha particles, and 2-6 MeV electrons), 28 count rates, and Poisson uncertainties in the fluxes and rates, as determined from the Cosmic Ray Telescope (CRT) on the Pioneer 11 spacecraft. Data are in annual files with consistent end-of-record marks. Spacecraft position data are not given in the data records but are accessible from Helioweb at http://cohoweb.gsfc.nasa.gov/helios/heli.html

Acknowledgement
the Principal Investigator, Frank B. McDonald
PublicationInfo
Authors
McDonald, Frank B.
PublicationDate
2025-11-14 16:02:53Z
PublishedBy
Space Physics Data Facility
Contacts
RolePersonStartDateStopDateNote
1.PrincipalInvestigatorspase://SMWG/Person/Frank.B.McDonald
2.GeneralContactspase://SMWG/Person/Nand.Lal
InformationURL
Name
Voldesc.sfdu
URL
https://spdf.gsfc.nasa.gov/pub/data/pioneer/pioneer11/particle/crt/ip_6hour_ascii/voldesc_v02.sfdu
InformationURL
Name
Format.sfdu
URL
https://spdf.gsfc.nasa.gov/pub/data/pioneer/pioneer11/particle/crt/ip_6hour_ascii/p11crt_format.sfdu
PriorIDs
spase://VEPO/NumericalData/Pioneer11/CRT/PT6H
spase://VSPO/NumericalData/Pioneer11/CRT/PT6H
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
FTPBrowser
URL
https://omniweb.gsfc.nasa.gov/ftpbrowser/p11_part_crt_6h.html
Description

For display and retrieval of parameter subsets

AccessURL
Name
Multi-Source Spectral Plot
URL
https://omniweb.gsfc.nasa.gov/ftpbrowser/flux_spectr_m.html
Description

Multi-source spectral plots (MSSP) of energetic particle fluxes for Z less than or equal to 2.

AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/pioneer/pioneer11/particle/crt/ip_6hour_ascii/
Description

For ftp downloading of annual files

AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/pioneer/pioneer11/particle/crt/ip_6hour_ascii/
Description

In CDF via HTTP from SPDF

Format
Text
DataExtent
Quantity
1.5
Units
MB
Per
P1Y
Acknowledgement
the Principal Investigator, Frank B. McDonald, and FTPBrowser at SPDF
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/Pioneer11/CRT
MeasurementType
EnergeticParticles
TemporalDescription
TimeSpan
StartDate
1973-04-02 00:00:00
StopDate
1994-12-31 00:00:00
Cadence
PT6H
ObservedRegion
Heliosphere.Outer
Parameter #1
Name
Proton Flux 3.45-5.15 MeV
Description

This flux is obtained from LET-I and is derived from pulse height data using R11A for normalization

Units
particles/(cm**2 sec ster MeV)
Structure
Size
1
FillValue
0.000000e+00
Particle
ParticleType
Proton
Qualifier
Average
ParticleQuantity
NumberFlux
EnergyRange
Low
3.45
High
5.15
Units
MeV
Parameter #2
Name
Proton Flux 30.55-56.47 MeV
Description

This flux is obtained from HET and is derived from pulse height data using R1 for normalization

Units
particles/(cm**2 sec ster MeV)
Structure
Size
1
FillValue
0.000000e+00
Particle
ParticleType
Proton
Qualifier
Average
ParticleQuantity
NumberFlux
EnergyRange
Low
30.55
High
56.47
Units
MeV
Parameter #3
Name
Proton Flux 120.7-227.3 MeV
Description

This flux is obtained from HET and is derived from pulse height data using R2 for normalization

Units
particles/(cm**2 sec ster MeV)
Structure
Size
1
FillValue
0.000000e+00
Particle
ParticleType
Proton
Qualifier
Average
ParticleQuantity
NumberFlux
EnergyRange
Low
120.7
High
227.3
Units
MeV
Parameter #4
Name
Helium Flux 3.44-4.97 MeV/n
Description

This flux is obtained from LET-1 and is derived from pulse height data using R11B for normalization

Units
particles/(cm**2 sec ster MeV/n)
Structure
Size
1
FillValue
0.000000e+00
Particle
ParticleType
AlphaParticle
Qualifier
Average
ParticleQuantity
NumberFlux
EnergyRange
Low
3.44
High
4.97
Units
MeV/n
Parameter #5
Name
Helium Flux 10.03-21.7 MeV/n
Description

This flux is obtained from LET-1 and is derived from pulse height data using R11B for normalization

Units
particles/(cm**2 sec ster MeV/n)
Structure
Size
1
FillValue
0.000000e+00
Particle
ParticleType
AlphaParticle
Qualifier
Average
ParticleQuantity
NumberFlux
EnergyRange
Low
10.03
High
21.7
Units
MeV/n
Parameter #6
Name
Helium Flux 30.67-56.7 MeV/n
Description

This flux is obtained from HET and is derived from pulse height data using R2B for normalization

Units
particles/(cm**2 sec ster MeV/n)
Structure
Size
1
FillValue
0.000000e+00
Particle
ParticleType
AlphaParticle
Qualifier
Average
ParticleQuantity
NumberFlux
EnergyRange
Low
30.67
High
56.7
Units
MeV/n
Parameter #7
Name
Helium Flux 112.7-413 MeV/n
Description

This flux is obtained from HET and is derived from pulse height data using R3A for normalization

Units
particles/(cm**2 sec ster MeV/n)
Structure
Size
1
FillValue
0.000000e+00
Particle
ParticleType
AlphaParticle
Qualifier
Average
ParticleQuantity
NumberFlux
EnergyRange
Low
112.7
High
413
Units
MeV/n
Parameter #8
Name
Electron Flux 2-6 MeV
Description

This flux is obtained from HET and is derived from pulse height data using R1 for normalization

Units
particles/(cm**2 sec ster MeV/n)
Structure
Size
1
FillValue
0.000000e+00
Particle
ParticleType
Electron
Qualifier
Average
ParticleQuantity
NumberFlux
EnergyRange
Low
2
High
6
Units
MeV/n
Parameter #9
Name
Poisson uncertainties in fluxes
Description

These are the Poisson uncertainties in the eight fluxes named above as scalars. In the data records, each immediately follows the flux it refers to.

Units
particles/(cm**2 sec ster MeV/n)
Structure
Size
8
FillValue
-1.000000e+00
Particle
ParticleType
Proton
ParticleType
AlphaParticle
ParticleType
Electron
Qualifier
Uncertainty
ParticleQuantity
NumberFlux
Parameter #10
Name
Count rates
Description

These are 28 6-hour-averaged count rates corresponding to various telescope sensors singly and in coincidence, and, for some, for various levels of energy deposition in sensors. The documentation cited above gives conditions for each rate: which sensors, which species (one or more), etc.

Units
particles/sec
Structure
Size
28
FillValue
0.000000e+00
Particle
ParticleType
Proton
ParticleType
AlphaParticle
ParticleType
Electron
Qualifier
Average
ParticleQuantity
Counts
Parameter #11
Name
Count rate uncertainties
Description

These are Poisson uncertainties in each of the above-identified 28 6-hour-averaged count rates corresponding to various telescope sensors singly and in coincidence, and, for some, for various levels of energy deposition in sensors. The documentation cited above gives conditions for each rate: which sensors, which species (one or more), etc. The uncertainty for each count rate immediately follows that count rate in the data records.

Units
particles/sec
Structure
Size
28
FillValue
-1.000000e+00
Particle
ParticleType
Proton
ParticleType
AlphaParticle
ParticleType
Electron
Qualifier
Uncertainty
ParticleQuantity
Counts