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Data Access
FTPBrowser
FTPS from SPDF (not with most browsers)
HTTPS from SPDF
Pioneer 11 Trapped Radiation Detector (TRD) 1-Hour Count Rates
var authors='Fillius, R. W.';
document.write(authors);
(2025).
Pioneer 11 Trapped Radiation Detector (TRD) 1-Hour Count Rates.
[Data set].
Space Physics Data Facility.
https://doi.org/10.48322/95ch-nq42. 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/Pioneer11/TRD/PT1H
Description
Hourly count rates from UCSD Trapped Radiation Detector
(TRD) carried on Pioneer 11. Included are four rates, C1 and C3 from the
Cerenkov counter and M1L and M3L from the Minimum Ionizing Particle Counter.
C1 corresponds to >480 MeV/n ions (typically 80% protons and 20% Z>1 nuclei).
C3 corresponds to >650 MeV/n ions (typically 30% protons and 70% Z>1 nuclei).
M1L corresponds to >80 MeV/n ions (typically 90% protons and 10% Z>1 nuclei).
M3L corresponds to 80-300 MeV protons (50%) and >80 MeV/n Z>1 nuclei (50%).
The data are ftp-accessible in annual ASCII files and via FTPBrowser.
The hourly averages were computed at NSSDC from 30-min data still offline
(as of Feb. 2009).
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/Pioneer11/TRD/PT1H
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Pioneer 11 Trapped Radiation Detector (TRD) 1-Hour Count Rates
DOI
https://doi.org/10.48322/95ch-nq42
ReleaseDate
2026-07-21 12:06:29Z
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 13:30:56Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-06-26 13:26:15Z
Note
Add 'Z' to TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:06:29Z
Note
Added HelioData InformationURL. JWL
Description
Hourly count rates from UCSD Trapped Radiation Detector
(TRD) carried on Pioneer 11. Included are four rates, C1 and C3 from the
Cerenkov counter and M1L and M3L from the Minimum Ionizing Particle Counter.
C1 corresponds to >480 MeV/n ions (typically 80% protons and 20% Z>1 nuclei).
C3 corresponds to >650 MeV/n ions (typically 30% protons and 70% Z>1 nuclei).
M1L corresponds to >80 MeV/n ions (typically 90% protons and 10% Z>1 nuclei).
M3L corresponds to 80-300 MeV protons (50%) and >80 MeV/n Z>1 nuclei (50%).
The data are ftp-accessible in annual ASCII files and via FTPBrowser.
The hourly averages were computed at NSSDC from 30-min data still offline
(as of Feb. 2009).
Acknowledgement
Please acknowledge the PI, R. Walker Fillius,
and the GSFC Space Physics Data Facility.
PublicationInfo
Authors
Fillius, R. W.
PublicationDate
2025-11-14 16:02:53Z
PublishedBy
Space Physics Data Facility
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/R.Walker.Fillius
InformationURL
Name
Readme at SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/pioneer/pioneer11/particle/trd/ip_1hour_ascii/p11trd_fmt.txt
InformationURL
Name
HelioData
URL
https://helio.data.nasa.gov/dataset/Pioneer11_TRD_PT1H
Description
The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.
PriorIDs
spase://VEPO/NumericalData/Pioneer11/TRD/PT1H
spase://VSPO/NumericalData/Pioneer11/TRD/PT1H
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_trd_1h.html
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/pioneer/pioneer11/particle/trd/ip_1hour_ascii/
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/pioneer/pioneer11/particle/trd/ip_1hour_ascii/
Description
In CDF via HTTP from SPDF
Format
Text
DataExtent
Quantity
14
Units
MB
Acknowledgement
Please acknowledge the PI, R. Walker Fillius,
and the GSFC Space Physics Data Facility
InstrumentIDs
spase://SMWG/Instrument/Pioneer11/TRD
MeasurementType
EnergeticParticles
TemporalDescription
TimeSpan
StartDate
1973-04-16 00:00:00Z
StopDate
1991-08-31 00:00:00Z
Cadence
PT1H
ObservedRegion
Heliosphere.Outer
Parameter #1
Name
C1 Count rate, ions > 480 MeV/n
ParameterKey
Column08
Description
Hourly count rate of protons > 480 MeV (~80% of counts)
and >480 MeV/n Z>1 ions
Cadence
PT1H
Units
cps
Particle
ParticleType
Proton
ParticleQuantity
CountRate
EnergyRange
Low
480
High
INF
Units
MeV/n
Parameter #2
Name
C3 Count rate, ions > 650 MeV/n
ParameterKey
Column09
Description
Hourly count rate of protons > 650 MeV (~30% of counts)
and >650 MeV/n Z>1 ions
Cadence
PT1H
Units
cps
Particle
ParticleType
Ion
ParticleQuantity
CountRate
EnergyRange
Low
650
High
INF
Units
MeV/n
Parameter #3
Name
M3L Count rate, ions > 80 MeV/n
ParameterKey
Column06
Description
Hourly count rate of protons between 80 and 300 MeV
(~50% of counts) and >80 MeV/n Z>1 ions
Cadence
PT1H
Units
cps
Particle
ParticleType
Proton
ParticleQuantity
CountRate
EnergyRange
Low
80
High
300
Units
MeV
Parameter #4
Name
M1L Count rate, ions (mostly protons) > 80 MeV/n
ParameterKey
Column07
Description
Hourly count rate of protons above 80 MeV
(~90% of counts) and >80 MeV/n Z>1 ions
Cadence
PT1H
Units
cps
Particle
ParticleType
Proton
ParticleQuantity
CountRate
EnergyRange
Low
80
High
INF
Units
MeV/n