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Voyager 2 Low-Energy Charged Particle (LECP) Background-Corrected Electron Differential Fluxes, Daily Data in CDF Format

Hill, Matthew; Nikoukar, Romina (2024). Voyager 2 Low-Energy Charged Particle (LECP) Background-Corrected Electron Differential Fluxes, Daily Data in CDF Format [Data set]. Space Physics Data Facility. https://doi.org/10.48322/prhs-g950 .

Note: Proper references, including those in BibTex or other formats , should include the "Accessed on date" as shown above to identify the version of the resource being cited in a given publication.

ResourceID
spase://NASA/NumericalData/Voyager2/LECP/Flux/Electron/BackgroundCorrectedDifferential/CDF/P1D

Description

This data set contains data from the LECP instrument on the Voyager 2 spacecraft. Each record in a file contains 1-day (24-hour) scan-averaged fluxes and flux uncertainties of electrons in two contiguous energy channels that cover the energy range 22-61 keV. The period 2006/001 through 2018/304 includes electrons measured upstream of the termination shock and in the heliosheath up to heliopause crossing. The voyager 2 LECP instrument steps through eight, 45 deg full-angle sectors, spending 192 sec in each sector, yielding a full scan through 360 deg every 25.6 min. The LECP scan plane is nearly parallel to RT-plane of the heliospheric RTN coordinate system. The electron data are averaged over the seven active sectors S1-S7; S8 is behind the sun-shield and not included in the average.
-- Electron channels designated EB01 and EB02
-- Data have been corrected to remove background due to penetrating cosmic ray ions
-- Electron fluxes and uncertainties (one st. dev.) in units: (cm^2 s sr MeV)^-1
-- Data are 5-point running averages of daily values
-- Values -9.900e+01 used for missing or nonphysical data
-- Negative year indicates filled data for the associated doy

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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/Voyager2/LECP/Flux/Electron/BackgroundCorrectedDifferential/CDF/P1D
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Voyager 2 Low-Energy Charged Particle (LECP) Background-Corrected Electron Differential Fluxes, Daily Data in CDF Format
DOI
https://doi.org/10.48322/prhs-g950
ReleaseDate
2026-07-21 12:08:53Z
RevisionHistory
RevisionEvent
ReleaseDate
2024-05-15 00:00:00.000Z
Note
Metadata created by LFB (ADAPT code), final editing and DOI minting by AK
RevisionEvent
ReleaseDate
2025-10-03 11:24:17Z
Note
Updated PublishedBy name to match ROR Registry. Added ResourceType and NamingAuthority. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to updated value in Version tag. ZCB
RevisionEvent
ReleaseDate
2025-12-04 13:32:33Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-06-26 13:31:12Z
Note
Add 'Z' to RevisionEvent:ReleaseDate(s), PublicationDate, TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:08:53Z
Note
Added HelioData InformationURL. JWL
Description

This data set contains data from the LECP instrument on the Voyager 2 spacecraft. Each record in a file contains 1-day (24-hour) scan-averaged fluxes and flux uncertainties of electrons in two contiguous energy channels that cover the energy range 22-61 keV. The period 2006/001 through 2018/304 includes electrons measured upstream of the termination shock and in the heliosheath up to heliopause crossing. The voyager 2 LECP instrument steps through eight, 45 deg full-angle sectors, spending 192 sec in each sector, yielding a full scan through 360 deg every 25.6 min. The LECP scan plane is nearly parallel to RT-plane of the heliospheric RTN coordinate system. The electron data are averaged over the seven active sectors S1-S7; S8 is behind the sun-shield and not included in the average.
-- Electron channels designated EB01 and EB02
-- Data have been corrected to remove background due to penetrating cosmic ray ions
-- Electron fluxes and uncertainties (one st. dev.) in units: (cm^2 s sr MeV)^-1
-- Data are 5-point running averages of daily values
-- Values -9.900e+01 used for missing or nonphysical data
-- Negative year indicates filled data for the associated doy

Acknowledgement
Please acknowledge the Voyager LECP Principal Investigator, Dr. Stamatios M. Krimigis of the Applied Physics Laboratory Johns Hopkins University. The LECP instrument was supported under a NASA Contract with the Johns Hopkins Applied Physics Laboratory, with subcontracts to Fundamental Technologies LLC.. 1. The Principal Investigators (PIs) shall, in a timely manner, make available to the science data user community (Users) data and access methods to reach the scientifically useful data and provide analysis tools equivalent to the level that the PI uses. 2. The PI shall make available appropriate data products to the Public that assist the PI's EPO responsibilities. 3. The PI shall ensure all scientifically important data and supporting material are archived to ensure long-term accessibility of the data and their correct and independent usability. 4. The PI or the appropriate provider shall inform Users of updates to processing software and calibrations via metadata and other appropriate documentation. 5. Users shall consult with the PI to ensure that the Users are accessing the most recent available versions of the data and analysis routines, and for assistance in the proper interpretation of the data. HDMC and the Final Archives shall facilitate this, serving as a contact point between PI and users as needed. 6. Browse products are not intended for science analysis or publication and shall not be used for those purposes without consent of the PI. 7. Users shall acknowledge the sources of data used in all publications, presentations, and reports. In some journals, this can now be done through formal citation of the data product in the reference list. 8. Users are encouraged to provide the PI a copy of each manuscript that uses the PI's data upon submission of that manuscript for consideration of publication. On publication the citation shall be transmitted to the PI and any other providers of data. (The community needs to work to find ways to make this easy/automatic.) 9. Users are encouraged to make tools of general utility and/or value-added data products widely available to the community. Users are encouraged to notify the PI of such utilities or products. The User shall also clearly label the product as being different from the original PI-produced data product.
PublicationInfo
Authors
Hill, Matthew; Nikoukar, Romina
PublicationDate
2024-01-01 00:00:00Z
PublishedBy
Space Physics Data Facility
Contacts
Role Person StartDate StopDate Note
1. PrincipalInvestigator spase://SMWG/Person/Stamatios.M.Krimigis
2. DeputyPI spase://SMWG/Person/Matthew.Hill
3. CoInvestigator spase://SMWG/Person/Robert.B.Decker
4. CoInvestigator spase://SMWG/Person/Jerry.W.Manweiler
5. MetadataContact spase://SMWG/Person/Robert.M.Candey
6. MetadataContact spase://SMWG/Person/Andriy.Koval
InformationURL
Name
Voyager Data at Fundamental Technologies
URL
https://voyager.ftecs.com/data.html
InformationURL
Name
Voyager LECP Experiments Web Site
URL
http://sd-www.jhuapl.edu/VOYAGER/
InformationURL
Name
Data in ASCII format
URL
https://spdf.gsfc.nasa.gov/pub/data/voyager/voyager2/particle/lecp/electron-background-corrected-daily/
InformationURL
Name
HelioData
URL
https://helio.data.nasa.gov/dataset/Voyager2_LECP_Flux_Electron_BackgroundCorrectedDifferential_CDF_P1D
Description

The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.

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/voyager/voyager2/particle/lecp/electron-background-corrected-daily-cdf/
Description

Access to Data in CDF Format via ftps from SPDF

AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/voyager/voyager2/particle/lecp/electron-background-corrected-daily-cdf/
Description

Access to Data in CDF Format via https from SPDF

AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=VOYAGER-2_LECP_ELEC-BGND-COR-1D&index=sp_phys
ProductKey
VOYAGER-2_LECP_ELEC-BGND-COR-1D
Description

Access to ASCII, CDF, and Plots via NASA/GSFC CDAWeb

Format
CDF
Encoding
None
Acknowledgement
Please acknowledge Stamatios M. Krimigis and Robert B. Decker. Please acknowledge the Data Providers and CDAWeb when using these Data.
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
CDAWeb HAPI Server
URL
https://cdaweb.gsfc.nasa.gov/hapi
Style
HAPI
ProductKey
VOYAGER-2_LECP_ELEC-BGND-COR-1D
Description

Web Service to this product using the HAPI interface.

Format
CSV
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/Voyager2/LECP
MeasurementType
EnergeticParticles
TemporalDescription
TimeSpan
StartDate
2006-01-01 00:00:00Z
StopDate
2018-10-31 00:00:00Z
Cadence
P1D
ObservedRegion
Heliosphere.Outer
ObservedRegion
Heliosphere.Heliosheath
Parameter #1
Name
Time
ParameterKey
Epoch
Description

Time, beginning of interval

Caveats
This Parameter exhibits an increasing Monotonic Progression
Units
ms
UnitsConversion
1.0e-3>s
RenderingHints
AxisLabel
Epoch
ValueFormat
E14.8
ScaleMin
6.2167197819904e+13
ScaleMax
6.4376186619904e+13
ValidMin
01-Jan-1970 00:00:00.000
ValidMax
01-Jan-2040 00:00:00.000
FillValue
31-Dec-9999 23:59:59.999
Support
SupportQuantity
Temporal
Parameter #2
Name
Year
ParameterKey
year
Description

4-digit year

RenderingHints
AxisLabel
year
ValueFormat
I4
ValidMin
1977
ValidMax
2050
Support
SupportQuantity
Temporal
Parameter #3
Name
Doy
ParameterKey
doy
Description

Day of year (1-365 or 366)

RenderingHints
AxisLabel
doy
ValueFormat
I3
ValidMin
1
ValidMax
366
Support
SupportQuantity
Temporal
Parameter #4
Name
Decimal Year
Set
Time series defined by using: Epoch
ParameterKey
decimalYear
Description

Decimal year = year + (doy - 1)/dpy (dpy=365 or 366)

Cadence
P1D
RenderingHints
DisplayType
TimeSeries
AxisLabel
decimal year
ValueFormat
F12.7
ValidMin
1977.0
ValidMax
2050.0
Support
SupportQuantity
Temporal
Parameter #5
Name
EB01_fav
Set
Time series defined by using: Epoch
ParameterKey
EB01_fav
Description

Flux, electrons 22-35 keV

Cadence
P1D
Units
(cm^2 s sr MeV)^-1
UnitsConversion
6.24161e-19>(m^2 s sr J)^-1
RenderingHints
DisplayType
TimeSeries
AxisLabel
EB01_fav
ValueFormat
E9.2
ValidMin
-1.0e+06
ValidMax
1.0e+06
FillValue
-99.0
Particle
ParticleType
Electron
Qualifier
Differential
ParticleQuantity
NumberFlux
EnergyRange
Low
22
High
35
Units
keV
Parameter #6
Name
EB01_favu
Set
Time series defined by using: Epoch
ParameterKey
EB01_favu
Description

Stat. unc. of EB01_fav

Cadence
P1D
Units
(cm^2 s sr MeV)^-1
UnitsConversion
6.24161e-19>(m^2 s sr J)^-1
RenderingHints
DisplayType
TimeSeries
AxisLabel
EB01_favu
ValueFormat
E9.2
ValidMin
-1.0e+06
ValidMax
1.0e+06
FillValue
-99.0
Particle
ParticleType
Electron
Qualifier
Uncertainty
Qualifier
Differential
ParticleQuantity
NumberFlux
EnergyRange
Low
22
High
35
Units
keV
Parameter #7
Name
EB02_fav
Set
Time series defined by using: Epoch
ParameterKey
EB02_fav
Description

Flux, electrons 35-61 keV

Cadence
P1D
Units
(cm^2 s sr MeV)^-1
UnitsConversion
6.24161e-19>(m^2 s sr J)^-1
RenderingHints
DisplayType
TimeSeries
AxisLabel
EB02_fav
ValueFormat
E9.2
ValidMin
-1.0e+06
ValidMax
1.0e+06
FillValue
-99.0
Particle
ParticleType
Electron
Qualifier
Differential
ParticleQuantity
NumberFlux
EnergyRange
Low
35
High
61
Units
keV
Parameter #8
Name
EB02_favu
Set
Time series defined by using: Epoch
ParameterKey
EB02_favu
Description

Stat. unc. of EB02_fav

Cadence
P1D
Units
(cm^2 s sr MeV)^-1
UnitsConversion
6.24161e-19>(m^2 s sr J)^-1
RenderingHints
DisplayType
TimeSeries
AxisLabel
EB02_favu
ValueFormat
E9.2
ValidMin
-1.0e+06
ValidMax
1.0e+06
FillValue
-99.0
Particle
ParticleType
Electron
Qualifier
Uncertainty
Qualifier
Differential
ParticleQuantity
NumberFlux
EnergyRange
Low
35
High
61
Units
keV