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Helios 2 E8 (Keppler) Hourly Particle Fluxes

(2025). Helios 2 E8 (Keppler) Hourly Particle Fluxes [Data set]. Space Physics Data Facility.

ResourceID
spase://NASA/NumericalData/Helios2/E8/PT1H

Description

Data set records contain hourly count rates of protons and
electrons in 16 energy ranges (protons: 15 differential channels between 21 and
677 keV, plus >677 keV; electrons: 15 differential channels between 17 and 835
keV, plus >835 keV), each in 16 22.5 deg azimuthal sectors. Accumulation times
for each count rate are also given. No spacecraft position information is
included. Data are from the E8 experiment on Helios 2.

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Details

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/Helios2/E8/PT1H
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Helios 2 E8 (Keppler) Hourly Particle Fluxes
ReleaseDate
2025-12-04 13:29:21Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-03-11 18:39:11Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-11-14 16:02:23Z
Note
Added PublicationInfo. Added ResourceType and NamingAuthority. ZCB
RevisionEvent
ReleaseDate
2025-12-04 13:29:21Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
Description

Data set records contain hourly count rates of protons and
electrons in 16 energy ranges (protons: 15 differential channels between 21 and
677 keV, plus >677 keV; electrons: 15 differential channels between 17 and 835
keV, plus >835 keV), each in 16 22.5 deg azimuthal sectors. Accumulation times
for each count rate are also given. No spacecraft position information is
included. Data are from the E8 experiment on Helios 2.

Acknowledgement
Please acknowledge the P.I., Erhard Keppler of Max Planck Institure, Lindau
PublicationInfo
Authors
Keppler, Erhard
PublicationDate
2025-11-14 16:02:23Z
PublishedBy
Space Physics Data Facility
Contacts
RolePersonStartDateStopDateNote
1.PrincipalInvestigatorspase://SMWG/Person/Erhard.Keppler
InformationURL
Name
Data set catalog at SPDF
URL
https://spdf.gsfc.nasa.gov/pub/documents/old/documentation_from_nssdc/dataset_catalogs/DSC_0488.pdf
InformationURL
Name
Readme file at SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/helios/helios1/particle/e8_keppler/h-ep.txt
PriorIDs
spase://VEPO/NumericalData/Helios2/E8/PT1H
spase://VSPO/NumericalData/Helios2/E8/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
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/helios/helios2/particle/e8_keppler/
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/helios/helios2/particle/e8_keppler/
Description

In CDF via HTTP from SPDF

Format
Text
DataExtent
Quantity
182
Units
MB
Acknowledgement
Please acknowledge the P.I., Erhard Keppler of MPI/Lindau and the Space Physics Data Facility at NASA/GSFC
InstrumentIDs
spase://SMWG/Instrument/Helios2/E8
MeasurementType
EnergeticParticles
TemporalDescription
TimeSpan
StartDate
1976-01-15 00:00:00
StopDate
1980-03-08 00:00:00
Cadence
PT1H
ObservedRegion
Heliosphere.Inner
Parameter #1
Name
Time tag
Description

The start times of the count rate averages, given as five
words: hours since start of 1974, year, day of year, hour, minute. Values of
the last one is uniformly zero.

Cadence
PT1H
Support
SupportQuantity
Temporal
Parameter #2
Name
Electron count rates
Description

16-sectored count rates of electrons in 16 energy ranges
(17-22, 22-28, 28-36, 36-46, 46-58, 58-74, 74-92, 93-120, 120-153, 153-201,
201-248, 248-298, 300-412, 412-525, 525-835, >835 keV).

Cadence
PT1H
Units
Particles/sec
Structure
Size
16 16
Description

Count rates of electrons in 16 energy ranges for each of 16
azimuthal sectors. Data cycle through energies for first sector, then repeats
for second sector, etc.

FillValue
0.0
Particle
ParticleType
Electron
Qualifier
Average
ParticleQuantity
CountRate
EnergyRange
Low
17
High
835
Units
keV
Parameter #3
Name
Accumulation times for electron count rates
Description

Accumulation times for each of the preceding 16x16 electron
count rates.

Cadence
PT1H
Units
Sec
Structure
Size
16 16
Description

The accumulation time for a given count rate immediately
follows its associated count rate in the data records.

Support
SupportQuantity
Temporal
Parameter #4
Name
Proton count rates
Description

16-sectored count rates of electrons in 16 energy ranges
(21-27, 27-35, 35-44, 44-56, 56-71, 71-90, 90-110, 110-137, 137-174, 174-222,
222-279, 279-353, 353-444, 444-563, 563-677, >677 keV).

Cadence
PT1H
Units
Particles/sec
Structure
Size
16 16
Description

Count rates of protonsons in 16 energy ranges for each of 16
azimuthal sectors. Data cycle through energies for first sector, then repeats
for second sector, etc.

FillValue
0.0
Particle
ParticleType
Proton
Qualifier
Average
ParticleQuantity
CountRate
EnergyRange
Low
21
High
677
Units
keV
Parameter #5
Name
Accumulation times for proton count rates
Description

Accumulation times for each of the preceding 16x16 proton
count rates.

Cadence
PT1H
Units
Sec
Structure
Size
16 16
Description

The accumulation time for a given count rate immediately
follows its associated count rate in the data records.

Support
SupportQuantity
Temporal