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Data Access
FTPBrowser
FTPS from SPDF (not with most browsers)
HTTPS from SPDF
Pioneer 11 Geiger Tube Telescope (GTT) 24-hr count rate data
var authors='Smith, Edward J.';
document.write(authors);
(2026).
Pioneer 11 Geiger Tube Telescope (GTT) 24-hr count rate data.
[Data set].
Space Physics Data Facility.
https://doi.org/10.48322/yc68-2644. 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/GTT/P1D
Description
This data set holds 24-hour-averaged count rates and
related parameters for each of 8 sensors or multi-sensor coincidence modes,
as obtained from the U.Iowa Geiger Tube Telescope (GTT) experiment flown
on Pioneer 11. Data have been corrected for RTG and temperature effects.
Single-sensor count rates are from the A (directional fluxes of
0.04-21 MeV electrons and 0.61-80 MeV protons, plus omnidirectional fluxes
of .GT.21 MeV electrons and .GT.80 MeV protons), B (directional fluxes
of 0.56-21 MeV electrons and 9-80 MeV protons, plus omnidirectional
fluxes of .GT.21 MeV electrons and .GT.80 MeV protons), C (omnidirectional
fluxes of .GT.21 MeV electrons and .GT.80 MeV protons), D (omnidirectional
fluxes of .GT.31 MeV electrons and .GT.80 MeV protons), and G (directional
fluxes of 0.61-3.41 MeV protons) Geiger tubes. Coincidence mode rates
are given for Geiger tube combinations (A,B), (A,B,C) and (D,E,F).
The G and (A,B,C) rates are each given multiple times in the 12 rates
of each 24-hr record. Additional parameters associated with each count
rate include numbers of counts contributing to each count rate, the
statistical uncertainty in each rate, and others used in U. Iowa's
processing and carried along for posterity. These are described in
the document identified in the first "Information URL." The data were
provided to NSSDC on a VMS-binary-formatted CD-ROM and were converted to
ASCII by GSFC/SPDF in 2010. The data are ftp-accessible in a single
9-MB file and are also accessible with graphical display from an
FTPBrowser interface.
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/GTT/P1D
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Pioneer 11 Geiger Tube Telescope (GTT) 24-hr count rate data
DOI
https://doi.org/10.48322/yc68-2644
ReleaseDate
2026-07-21 12:06:28Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-03-11 18:39:11Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-12-04 13:30:55Z
Note
Added MetadataRightsList and RightsList(s). Added ResourceType and NamingAuthority. Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-04-10 09:58:47Z
Note
Added new Contact(s). ZCB
RevisionEvent
ReleaseDate
2026-04-10 10:03:45Z
Note
Added PublicationInfo. ZCB
RevisionEvent
ReleaseDate
2026-04-30 16:34:09Z
Note
Added DOI. tlk
RevisionEvent
ReleaseDate
2026-06-26 13:26:12Z
Note
Add 'Z' to TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:06:28Z
Note
Added HelioData InformationURL. JWL
Description
This data set holds 24-hour-averaged count rates and
related parameters for each of 8 sensors or multi-sensor coincidence modes,
as obtained from the U.Iowa Geiger Tube Telescope (GTT) experiment flown
on Pioneer 11. Data have been corrected for RTG and temperature effects.
Single-sensor count rates are from the A (directional fluxes of
0.04-21 MeV electrons and 0.61-80 MeV protons, plus omnidirectional fluxes
of .GT.21 MeV electrons and .GT.80 MeV protons), B (directional fluxes
of 0.56-21 MeV electrons and 9-80 MeV protons, plus omnidirectional
fluxes of .GT.21 MeV electrons and .GT.80 MeV protons), C (omnidirectional
fluxes of .GT.21 MeV electrons and .GT.80 MeV protons), D (omnidirectional
fluxes of .GT.31 MeV electrons and .GT.80 MeV protons), and G (directional
fluxes of 0.61-3.41 MeV protons) Geiger tubes. Coincidence mode rates
are given for Geiger tube combinations (A,B), (A,B,C) and (D,E,F).
The G and (A,B,C) rates are each given multiple times in the 12 rates
of each 24-hr record. Additional parameters associated with each count
rate include numbers of counts contributing to each count rate, the
statistical uncertainty in each rate, and others used in U. Iowa's
processing and carried along for posterity. These are described in
the document identified in the first "Information URL." The data were
provided to NSSDC on a VMS-binary-formatted CD-ROM and were converted to
ASCII by GSFC/SPDF in 2010. The data are ftp-accessible in a single
9-MB file and are also accessible with graphical display from an
FTPBrowser interface.
Acknowledgement
Drs. James A. Van Allen, the original PI, and
Bruce Randall
PublicationInfo
Authors
Smith, Edward J.
PublicationDate
2026-04-10 10:03:45Z
PublishedBy
Space Physics Data Facility
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/Edward.J.Smith
2.
GeneralContact
spase://SMWG/Person/Bruce.A.Randall
InformationURL
Name
Iowa SFDU-formatted documentation
URL
https://spdf.gsfc.nasa.gov/pub/data/pioneer/pioneer11/particle/gtt/aavoldesc.sfd
Description
U.Iowa-written nssdcftp-resident descriptive document
InformationURL
Name
Readme at SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/pioneer/pioneer11/particle/gtt/ip_1day_ascii/p11_gtt_daily_readme.txt
Description
Readme with format statement for this ASCII version
InformationURL
Name
HelioData
URL
https://helio.data.nasa.gov/dataset/Pioneer11_GTT_P1D
Description
The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.
PriorIDs
spase://VEPO/NumericalData/Pioneer11/GTT/P1D
spase://VSPO/NumericalData/Pioneer11/GTT/P1D
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_gtt_1d.html
Description
Graphical display, etc.
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/pioneer/pioneer11/particle/gtt/ip_1day_ascii/
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/pioneer/pioneer11/particle/gtt/ip_1day_ascii/
Description
In CDF via HTTP from SPDF
Format
Text
DataExtent
Quantity
9
Units
MB
Acknowledgement
Drs. James A. Van Allen, the original PI, and
Bruce Randall at U.Iowa, plus GSFC's Space Physics Data Facility
ProcessingLevel
Uncalibrated
InstrumentIDs
spase://SMWG/Instrument/Pioneer11/GTT
MeasurementType
EnergeticParticles
TemporalDescription
TimeSpan
StartDate
1972-03-03 00:00:00Z
StopDate
2002-04-27 00:00:00Z
Note
Coverage is low after the mid-1990's.
Cadence
P1D
ObservedRegion
Heliosphere.Outer
Parameter #1
Name
Sensor A count rate
ParameterKey
Column_34
Description
Count rate due to directional fluxes of
0.04-21 MeV electrons and 0.61-80 MeV protons, plus omnidirectional
fluxes of .GT.21 MeV electrons and .GT.80 MeV protons
Cadence
P1D
Units
1/sec
FillValue
0.00000e+00
Particle
ParticleType
Electron
ParticleType
Proton
ParticleQuantity
CountRate
Parameter #2
Name
Sensor B count rate
ParameterKey
Column_35
Description
Count rate due to directional fluxes of
0.56-21 MeV electrons and 9-80 MeV protons, plus omnidirectional
fluxes of .GT.21 MeV electrons and .GT.80 MeV protons
Cadence
P1D
Units
1/sec
FillValue
0.00000e+00
Particle
ParticleType
Electron
ParticleType
Proton
ParticleQuantity
CountRate
Parameter #3
Name
Sensor C count rate
ParameterKey
Column_39
Description
Count rate due to omnidirectional fluxes of
.GT.21 MeV electrons and .GT.80 MeV protons
Cadence
P1D
Units
1/sec
FillValue
0.00000e+00
Particle
ParticleType
Electron
ParticleType
Proton
ParticleQuantity
CountRate
Parameter #4
Name
Sensor D count rate
ParameterKey
Column_40
Description
Count rate due to omnidirectional fluxes of
.GT.31 MeV electrons and .GT.80 MeV protons
Cadence
P1D
Units
1/sec
FillValue
0.00000e+00
Particle
ParticleType
Electron
ParticleType
Proton
ParticleQuantity
CountRate
Parameter #5
Name
Sensor G count rate
ParameterKey
Column_33
Description
Count rate due to directional fluxes of
0.61-3.41 Mev protons. See also columns 36 and 43.
Cadence
P1D
Units
1/sec
FillValue
0.00000e+00
Particle
ParticleType
Electron
ParticleType
Proton
ParticleQuantity
CountRate
Parameter #6
Name
Coincidence mode (A,B) count rate
ParameterKey
Column_37
Description
(A,B) coincidence mode count rate due to directional fluxes of
.GT.21 MeV electrons and .GT.130 MeV protons.
Cadence
P1D
Units
1/sec
FillValue
0.00000e+00
Particle
ParticleType
Electron
ParticleType
Proton
ParticleQuantity
CountRate
Parameter #7
Name
Coincidence mode (A,B,C) count rate
ParameterKey
Column_38
Description
(A,B,C) coincidence mode count rate due to directional fluxes of
.GT.21 MeV electrons and .GT.130 MeV protons. See also columns 41 and 44.
Cadence
P1D
Units
1/sec
FillValue
0.00000e+00
Particle
ParticleType
Electron
ParticleType
Proton
ParticleQuantity
CountRate
Parameter #8
Name
Coincidence mode (D,E,F) count rate
ParameterKey
Column_42
Description
(D,E,F) coincidence mode count rate due to omnidirectional
fluxes of .GT.31 MeV electrons and .GT.150 MeV protons. E and F are Geiger
tubes whose individual count rates are not taken.
Cadence
P1D
Units
1/sec
FillValue
0.00000e+00
Particle
ParticleType
Electron
ParticleType
Proton
ParticleQuantity
CountRate
Parameter #9
Name
Standard deviations in all count rates
ParameterKey
Column_45_through_Column_56
Description
Standard deviations [count rate/SQRT(#points)]
in each of the 12 count rates of columns 33-44.
Cadence
P1D
Units
1/sec
Structure
Size
12
Description
Standard deviation in the count rates in Columns
33 to 44, respectively
FillValue
0.00000e+00
Particle
ParticleType
Electron
ParticleType
Proton
Qualifier
StandardDeviation
ParticleQuantity
CountRate
Parameter #10
Name
Numbers of raw counts in all count rates
ParameterKey
Column_93_through_Column_104
Description
Number of raw counts in each of the 12 count
rates in columns 33-44
Cadence
P1D
Structure
Size
12
Description
numbers of counts in the count rates in Columns
33 to 44, respectively
FillValue
0.00000e+00
Particle
ParticleType
Electron
ParticleType
Proton
Qualifier
StandardDeviation
ParticleQuantity
CountRate
Parameter #11
Name
Spacecraft position information
ParameterKey
Column_107_through_Column_116
Description
In sequence, data words are: Earth-spacecraft
distance, AU; Earth-sun distance, AU; Sun-spacecraft distance, AU;
celestial longitude of Earth; celestial longitude of spacecraft;
longitude of solar equator + 270; celestial latitude of Earth;
celestial latitude of spacecraft; heliographic latitude of spacecraft;
heliographic latitude of Earth.
Cadence
P1D
Structure
Size
10
Description
Positional parameters for spacecraft and earth
Support
SupportQuantity
Positional