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Data Access
Investigator site
OMNIWeb-Plus
Multi-Source Spectral Plot
Helios 2 E7 (Trainor) 30-min fluxes and rates
ResourceID
spase://NASA/NumericalData/Helios2/E7/PT30M
Description
This data set, created in 2010 by Nand Lal,
contains 30-min resolution fluxes and count rates of
energetic protons, alpha particles, electrons and
X-rays from the E7 experiment (P.I.: J. Trainor, GSFC)
flown on the Helios 2 spacecraft. Accompanying each
flux and count rate is a statistical uncertainty of the
flux or rate. The data are spin-averaged. The data
are in 1020-character ASCII records and consist of:
A. Proton fluxes based on pulse height and rate data
in 7 energy windows, 3.42-5.40, 6.40-11.95, 11.95-22.15,
24.59-28.74, 32.20-45.93, 45.93-57.56, 143.0-204.5 MeV.
B. Alpha particle fluxes based on pulse heights and count
rates in 6 energy windows, 3.24-4.78, 5.00-11.55,
11.55-21.76, 24.53-31.12, 31.35-45.63, 45.63-57.55 MeV/n.
C. Combined proton plus alpha particle fluxes based on
LET1 and HET count rates in 6 energy windows, 3-6, 6-11,
11-21, 20-30, 32-45, 45-56 MeV/n.
D. Alpha particle fluxes based on HET count rates in three
energy windows, 20-30, 32-45, 45-57 MeV/n.
E. Two count rates primarily due to electrons at 2-4 and
4-8 MeV.
F. 26 additional count rates corresponding to individual
telescope sensors or sensor coincidences. For one sensor,
rates at each of several discrimination levels are given).
These rates are further discussed in the documentation and
in the references provided. A subset of the above
parameters (A, B, E) are available with graphical display
at the OMNIWeb-Plus interface identified below
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/Helios2/E7/PT30M
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Helios 2 E7 (Trainor) 30-min fluxes and rates
ReleaseDate
2025-12-04 13:29:21Z
RevisionHistory
RevisionEvent
ReleaseDate
2020-07-07 21:14:35Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-12-04 13:29:21Z
Note
Added MetadataRightsList and RightsList(s). Added ResourceType and NamingAuthority. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB
Description
This data set, created in 2010 by Nand Lal,
contains 30-min resolution fluxes and count rates of
energetic protons, alpha particles, electrons and
X-rays from the E7 experiment (P.I.: J. Trainor, GSFC)
flown on the Helios 2 spacecraft. Accompanying each
flux and count rate is a statistical uncertainty of the
flux or rate. The data are spin-averaged. The data
are in 1020-character ASCII records and consist of:
A. Proton fluxes based on pulse height and rate data
in 7 energy windows, 3.42-5.40, 6.40-11.95, 11.95-22.15,
24.59-28.74, 32.20-45.93, 45.93-57.56, 143.0-204.5 MeV.
B. Alpha particle fluxes based on pulse heights and count
rates in 6 energy windows, 3.24-4.78, 5.00-11.55,
11.55-21.76, 24.53-31.12, 31.35-45.63, 45.63-57.55 MeV/n.
C. Combined proton plus alpha particle fluxes based on
LET1 and HET count rates in 6 energy windows, 3-6, 6-11,
11-21, 20-30, 32-45, 45-56 MeV/n.
D. Alpha particle fluxes based on HET count rates in three
energy windows, 20-30, 32-45, 45-57 MeV/n.
E. Two count rates primarily due to electrons at 2-4 and
4-8 MeV.
F. 26 additional count rates corresponding to individual
telescope sensors or sensor coincidences. For one sensor,
rates at each of several discrimination levels are given).
These rates are further discussed in the documentation and
in the references provided. A subset of the above
parameters (A, B, E) are available with graphical display
at the OMNIWeb-Plus interface identified below
Acknowledgement
The late Dr. James H. Trainor and
Dr. Nand Lal
Contacts
Role
Person
StartDate
StopDate
Note
1.
DataProducer
spase://SMWG/Person/Nand.Lal
InformationURL
Name
Helios 2 E7 Readme
URL
https://voyager.gsfc.nasa.gov/helios/Helios-2.html
Description
Listing of parameters in data records
PriorIDs
spase://VEPO/NumericalData/Helios2/E7/PT30M
spase://VSPO/NumericalData/Helios2/E7/PT30M
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
Investigator site
URL
https://voyager.gsfc.nasa.gov/helios/
AccessURL
Name
OMNIWeb-Plus
URL
https://omniweb.gsfc.nasa.gov/ftpbrowser/helios2_e7_30min.html
Description
Primary parameters of data product, with graphical display
AccessURL
Name
Multi-Source Spectral Plot
URL
https://omniweb.gsfc.nasa.gov/ftpbrowser/flux_spectr_m.html
Description
Spectral plots and power law fits for arbitrary durations
Format
Text
Acknowledgement
The late Dr. James H. Trainor and Dr. Nand Lal,
plus GSFC's Space Physics Data Facility
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/Helios2/E7
MeasurementType
EnergeticParticles
TemporalDescription
TimeSpan
StartDate
1976-01-19 00:00:00
StopDate
1979-12-23 00:00:00
Cadence
PT30M
ObservedRegion
Heliosphere.Inner
Parameter #1
Name
Proton fluxes and uncertainties
ParameterKey
Column_2_through_Column_15
Description
Proton fluxes and associated statistical
uncertainties for the seven energy ranges 3.42-5.40, 6.40-11.95,
11.95-22.15, 24.59-28.74, 32.20-45.93, 45.93-57.56, 143.0-204.5
MeV. The fluxes are obtained by combining pulse height and count
rate data.
Cadence
PT30M
Units
1/(cm**2 sec ster MeV)
Structure
Size
7 2
Description
Seven rows of pairs of proton flux and
statistical uncertainty in the flux. The rows correspond
to the seven energy ranges given above.
Particle
ParticleType
Proton
Qualifier
Differential
ParticleQuantity
NumberFlux
EnergyRange
Low
3.42
High
204.5
Units
MeV
Parameter #2
Name
Alpha particle fluxes and uncertainties
ParameterKey
Column_16_through_Column_27
Description
Alpha particle fluxes and associated statistical
uncertainties for the six energy ranges 3.24-4.78, 5.00-11.55,
11.55-21.76, 24.53-31.12, 31.35-45.63, 45.63-57.55 MeV/n.
The fluxes are obtained by combining pulse height and count
rate data.
Cadence
PT30M
Units
1/(cm**2 sec ster MeV/n)
Structure
Size
6 2
Description
Six rows of pairs of alpha particle flux and
statistical uncertainty in the flux. The rows correspond
to the six energy ranges given above.
Particle
ParticleType
AlphaParticle
Qualifier
Differential
ParticleQuantity
NumberFlux
EnergyRange
Low
3.24
High
57.55
Units
MeV/n
Parameter #3
Name
Combined proton and alpha particle fluxes and uncertainties
ParameterKey
Column_28_through_Column_39
Description
Fluxes for mixed protons and alpha particles,
and associated statistical uncertainties, for the six energy ranges
3-6, 6-11, 11-21, 20-30, 32-45, 45-56 MeV/n. The fluxes are based
on count rates only, without any pulse height analysis.
Cadence
PT30M
Units
1/(cm**2 sec ster MeV/n)
Structure
Size
6 2
Description
Six rows of pairs of proton flux and
statistical uncertainty in the flux. The rows correspond
to the six energy ranges given above.
Particle
ParticleType
Proton
ParticleType
AlphaParticle
Qualifier
Differential
ParticleQuantity
NumberFlux
EnergyRange
Low
3
High
56
Units
MeV/n
Parameter #4
Name
Alpha particle fluxes and uncertainties without PHA
ParameterKey
Column_46_through_Column_51
Description
Fluxes of alpha particles and associated
statistical uncertainties, for the three energy ranges
20-30, 32-45, 45-57 MeV/n. The fluxes are based on count
rates only, without any pulse height analysis.
Cadence
PT30M
Units
1/(cm**2 sec ster MeV/n)
Structure
Size
3 2
Description
Three rows of pairs of alpha particle
flux and statistical uncertainty in the flux. The rows correspond
to the three energy ranges given above.
Particle
ParticleType
AlphaParticle
Qualifier
Differential
ParticleQuantity
NumberFlux
EnergyRange
Low
20
High
57
Units
MeV/n
Parameter #5
Name
Electron count rates and uncertainties
ParameterKey
Column_94_through_Column_97
Description
Count rates primarily due to electrons, and
associated statistical uncertainties, for the two energy ranges
2-4 and 4-8 MeV.
Cadence
PT30M
Units
1/sec
Structure
Size
2 2
Description
Two rows of pairs of electron count rate
and statistical uncertainty in the rate. The rows correspond
to the 2-4 and 4-8 MeV energy ranges.
Particle
ParticleType
Electron
Qualifier
Differential
ParticleQuantity
CountRate
EnergyRange
Low
2
High
8
Units
MeV
Parameter #6
Name
Miscellaneous additional count rates and uncertainties
ParameterKey
Column_40_through_Column_101
Description
26 additional count rates corresponding to
individual telescope sensors or sensor combinations. For one
sensor, rates at each of several discrimination levels are
given). These rates are further discussed in the documentation
and in the references provided. They are not likely to be widely
useful
Cadence
PT30M
Units
1/sec
Structure
Size
26 2
Description
21 rows of pairs of various count rate
and statistical uncertainty in the rate.
Particle
ParticleType
Ion
ParticleQuantity
CountRate