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Data Access
Download link for daily avg. of log LANL-GEO ESP Diff. Energy Flux
LANL-GEO ESP Differential Log-Flux Daily Avg.
ResourceID
spase://NASA/NumericalData/LANL/Avg/ESP/P1D
Description
Daily-averaged electron fluxes from the Los Alamos National Laboratory (LANL) Energetic Spectrometer for Particles (ESP) Daily averages from each geosynchronous satellite available on any given day were merged into a single, uniform daily average. Data span 22 September, 1989 through 31 December, 2009. Data are log(flux) with flux in units of electrons /(cm^2.s.sr.keV) [see t 2010JA015735 _LANL_Data_and_Processing for details]
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/LANL/Avg/ESP/P1D
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
LANL-GEO ESP Differential Log-Flux Daily Avg.
AlternateName
Los Alamos National Laboratory (LANL)-GEOsynchronous (GEO) Energetic Spectrometer for Particles (ESP) Log (base 10) Differential Flux (Particles/(cm^2)/s/keV/steradian) Daily Avg. (of available satellite data)
ReleaseDate
2026-07-21 12:05:40Z
RevisionHistory
RevisionEvent
ReleaseDate
2020-07-07 21:14:45Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-12-04 13:29:52Z
Note
Added MetadataRightsList. 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
RevisionEvent
ReleaseDate
2026-06-26 13:18:33Z
Note
Add 'Z' to TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:05:40Z
Note
Added HelioData InformationURL. JWL
Description
Daily-averaged electron fluxes from the Los Alamos National Laboratory (LANL) Energetic Spectrometer for Particles (ESP) Daily averages from each geosynchronous satellite available on any given day were merged into a single, uniform daily average. Data span 22 September, 1989 through 31 December, 2009. Data are log(flux) with flux in units of electrons /(cm^2.s.sr.keV) [see t 2010JA015735 _LANL_Data_and_Processing for details]
Acknowledgement
Reeves, G. D., S. K. Morley, R. H. W. Friedel, M. G. Henderson, T. E. Cayton, G. Cunningham, J. B. Blake, R. A. Christensen, and D. Thomsen (2011), On the relationship between relativistic electron flux and solar wind velocity: Paulikas and Blake revisited, J. Geophys. Res., 116, A02213, doi:10.1029/2010JA015735.
Contacts
Role
Person
StartDate
StopDate
Note
1.
DataProducer
spase://SMWG/Person/Geoffrey.D.Reeves
2.
DataProducer
spase://SMWG/Person/Steven.Karl.Morley
3.
DataProducer
spase://SMWG/Person/Reiner.Friedel
4.
DataProducer
spase://SMWG/Person/Michael.G.Henderson
5.
DataProducer
spase://SMWG/Person/Thomas.E.Cayton
6.
DataProducer
spase://SMWG/Person/Glenn.F.Cunningham
7.
DataProducer
spase://SMWG/Person/J.Bernard.Blake
InformationURL
Name
On the relationship between relativistic electron flux and solar wind velocity: Paulikas and Blake revisited
URL
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2010JA015735
Description
Describes the processing performed on the SOPA and ESP data that were included in Reeves et. al, 2011
InformationURL
Name
Electronic supplement to "On the relationship between relativistic electron flux and solar wind velocity: Paulikas and Blake Revisited”
URL
https://agupubs.onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1029%2F2010JA015735&attachmentId=69009962
Description
Detailed information concerning instruments used, algorithm, and the resulting caveats of usage for data set.
InformationURL
Name
2010ja015735-readme.txt
URL
https://agupubs.onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1029%2F2010JA015735&attachmentId=69009961
Description
Readme file with basic information on processing performed.
InformationURL
Name
HelioData
URL
https://helio.data.nasa.gov/dataset/LANL_Avg_ESP_P1D
Description
The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.
PriorIDs
spase://ViRBO/NumericalData/LANL/ESP/P1D
spase://VSPO/NumericalData/LANL/Avg/ESP/P1D
AccessInformation
RepositoryID
spase://SMWG/Repository/AGU/JGR
Availability
Online
AccessURL
Name
Download link for daily avg. of log LANL-GEO ESP Diff. Energy Flux
URL
https://agupubs.onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1029%2F2010JA015735&attachmentId=69009963
Description
Daily-averaged electron fluxes from the Los Alamos National Laboratory (LANL) Energetic Spectrometer for Particles (ESP) Daily averages from each geosynchronous satellite available on any given day were merged into a single, uniform daily average. Data span 22 September, 1989 through 31 December, 2009. Data are log(flux) with flux in units of electrons /(cm^2.s.sr.keV) [see t 2010JA015735 _LANL_Data_and_Processing for details]
Nominal energy ranges for each ESP channel are
E234: 1.8-3.5MeV;
E56: 3.5-6.0MeV;
E7: 6.0-7.8MeV;
2.1 Column Date_YYYY-MM-DD Calendar date in YYYY-MM-DD format;
2.2 Column log(E234), log(flux) ESP channel E234;
2.3 Column log(E56), log(flux), ESP channel E56;
2.4 Column log(E7), log(flux), ESP channel E7
Format
Text
Encoding
ASCII
Acknowledgement
Reeves, G. D., S. K. Morley, R. H. W. Friedel, M. G. Henderson, T. E. Cayton, G. Cunningham, J. B. Blake, R. A. Christensen, and D. Thomsen (2011), On the relationship between relativistic electron flux and solar wind velocity: Paulikas and Blake revisited, J. Geophys. Res., 116, A02213, doi:10.1029/2010JA015735.
ProcessingLevel
Calibrated
ProviderResourceName
Daily-averaged electron fluxes from the Los Alamos National Laboratory (LANL) Energetic Spectrometer for Particles (ESP)
InstrumentIDs
spase://SMWG/Instrument/LANL/1989/ESP
spase://SMWG/Instrument/LANL/1990/ESP
spase://SMWG/Instrument/LANL/1991/ESP
spase://SMWG/Instrument/LANL/1994/ESP
spase://SMWG/Instrument/LANL/97A/ESP
spase://SMWG/Instrument/LANL/01A/ESP
spase://SMWG/Instrument/LANL/02A/ESP
MeasurementType
EnergeticParticles
TemporalDescription
TimeSpan
StartDate
1989-09-22 00:00:00Z
StopDate
2010-01-01 00:00:00Z
Cadence
PT24H
ObservedRegion
Earth.Magnetosphere
Caveats
"There are a number of caveats associated with these data. Primary cosmic rays may account for a substantial fraction of the observed counts. A significant secondary contribution is also implied, however there is currently
no modeling to suggest to what extent this contributes to the observed
counts. Some ESP channels appear to saturate at 4 x 10^4 counts/ s. The
reported flux levels should not be used as absolute measures: It is known
that ESP yields lower fluxes and harder spectra than SOPA, in the region of
overlap between the detectors. Calculation of spectra, for example, would
not be meaningful for this data set – especially as the data are daily averaged
and merged from several satellites." (Electronic supplement to "On the relationship between relativistic electron flux and solar wind velocity: Paulikas and Blake Revisited”)
Parameter #1
Name
Date
Description
Date, YYYY-MM-DD
Cadence
PT24H
Support
SupportQuantity
Temporal
Parameter #2
Name
log(E234)
Description
Base 10 logarithm of the total flux in channels 2, 3, and 4 of the LANL-GEO ESP measurements selected for a day
Cadence
PT24H
Units
#/cm^2/keV/s/sr
Particle
ParticleType
Electron
ParticleQuantity
NumberFlux
EnergyRange
Low
1.8
High
3.5
Units
MeV
Parameter #3
Name
log(E56)
Description
Base 10 logarithm of the total flux in channels 5 and 6 of the LANL-GEO ESP measurements selected for a day.
Cadence
PT24H
Units
#/cm^2/keV/s/sr
Particle
ParticleType
Electron
ParticleQuantity
NumberFlux
EnergyRange
Low
3.5
High
6.0
Units
MeV
Parameter #4
Name
log(E56)
Description
Base 10 logarithm of the total flux in channel 7 of the LANL-GEO ESP measurements selected for a day.
Cadence
PT24H
Units
#/cm^2/keV/s/sr
Particle
ParticleType
Electron
ParticleQuantity
NumberFlux
EnergyRange
Low
6.0
High
8.0
Units
MeV