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Van Allen Probe B Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) Density and other Parameters derived by digitizing Traces on Spectrograms, Level 4 (L4), 0.5 s Data

W. S. Kurth, S. De Pascuale, J. B. Faden, C. A. Kletzing, G. B. Hospodarsky, S. A. Thaller, and J. R. Wygant (2022). Van Allen Probe B Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) Density and other Parameters derived by digitizing Traces on Spectrograms, Level 4 (L4), 0.5 s Data [Data set]. Space Physics Data Facility. https://doi.org/10.48322/c6s1-wg66 .

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ResourceID
spase://NASA/NumericalData/RBSP/B/EMFISIS/WFR/L4/ElectronDensity/PT0.5S

Description

Van Allen Probe B, Electric and Magnetic Field Instrument Suite and Integrated Science, EMFISIS, derived Density and other Parameters inferred by digitizing Traces on Spectrograms. The EMFISIS Waves Instrument provides a Measure of the Frequency of the Upper Hybrid Resonance Band thereby providing an accurate Determination of the Electron Density. The Electron Density is most easily and accurately measured by Means of Resonances and Cutoffs in the Wave Spectrum rather than Particle Detector Measurements which are subject to Spacecraft Charging and other complicating Factors.

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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/RBSP/B/EMFISIS/WFR/L4/ElectronDensity/PT0.5S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Van Allen Probe B Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) Density and other Parameters derived by digitizing Traces on Spectrograms, Level 4 (L4), 0.5 s Data
DOI
https://doi.org/10.48322/c6s1-wg66
ReleaseDate
2026-06-26 13:27:32Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 15:38:11Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2022-08-18 12:34:56.789Z
Note
Added DOI and PublicationInfo minted by LFB, updated InformationURL URLs as needed, updated the SPDF MetadataContact Person to Robert M. Candey, metadata updated to SPASE 2.4.1, reviewed by LFB 20220818
RevisionEvent
ReleaseDate
2023-07-04 12:34:56.789Z
Note
Corrected authorlist with W. S. Kurth as lead, updated contact list, key JGR paper citation added, fixed RepositoryID to CDAWeb, added SAB as MetaDataContact , reviewed by SAB 20230706
RevisionEvent
ReleaseDate
2025-09-18 10:49:18Z
Note
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
2025-10-03 10:49:07Z
Note
Updated PublishedBy name to match ROR Registry. ZCB
RevisionEvent
ReleaseDate
2025-12-04 13:31:18Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-06-26 13:27:32Z
Note
Add 'Z' to RevisionEvent:ReleaseDate(s), PublicationDate, TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
Description

Van Allen Probe B, Electric and Magnetic Field Instrument Suite and Integrated Science, EMFISIS, derived Density and other Parameters inferred by digitizing Traces on Spectrograms. The EMFISIS Waves Instrument provides a Measure of the Frequency of the Upper Hybrid Resonance Band thereby providing an accurate Determination of the Electron Density. The Electron Density is most easily and accurately measured by Means of Resonances and Cutoffs in the Wave Spectrum rather than Particle Detector Measurements which are subject to Spacecraft Charging and other complicating Factors.

Acknowledgement
W. S. Kurth, S. De Pascuale, J. B. Faden, C. A. Kletzing, G. B. Hospodarsky, S. A. Thaller, and J. R. Wygant
PublicationInfo
Authors
W. S. Kurth, S. De Pascuale, J. B. Faden, C. A. Kletzing, G. B. Hospodarsky, S. A. Thaller, and J. R. Wygant
PublicationDate
2022-01-01 00:00:00Z
PublishedBy
Space Physics Data Facility
Contacts
Role Person StartDate StopDate Note
1. PrincipalInvestigator spase://SMWG/Person/William.S.Kurth
2. Scientist spase://SMWG/Person/Sebastian.De Pascuale
3. Scientist spase://SMWG/Person/Jeremy.B.Faden
4. Scientist spase://SMWG/Person/Craig.A.Kletzing
5. Scientist spase://SMWG/Person/George.B.Hospodarsky
6. Scientist spase://SMWG/Person/Scott.A.Thaller
7. Scientist spase://SMWG/Person/John.R.Wygant
8. MetadataContact spase://SMWG/Person/Scott.Boardsen
9. MetadataContact spase://SMWG/Person/Robert.M.Candey
10. MetadataContact spase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
Electron densities inferred from plasma wave spectra obtained by the Waves instrument on Van Allen Probes, W. S. Kurth, S. De Pascuale, J. B. Faden, C. A. Kletzing, G. B. Hospodarsky, S. Thaller, and J. R. Wygant, published in JGR
URL
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2014JA020857
Description

This paper details how electron density was inferred primarily from the upper hybrid resonance frequency.

InformationURL
Name
Van Allen Probes Home Page, JHU/APL
URL
https://vanallenprobes.jhuapl.edu
Description

Van Allen Probes Home Page, Exploring Earth's Radiation Belts and the Extremes of Space Weather, Applied Physics Laboratory, Johns Hopkins University

InformationURL
Name
Van Allen Probes Science Gateway for access to Data, Models, Software and Tools for Researchers, Students and the General Public, JHU/APL
URL
https://rbspgway.jhuapl.edu/
Description

Van Allen Probes Science Gateway for access to Data, Models, Software and Tools for Researchers, Students and the General Public at the Applied Physics Laboratory, Johns Hopkins University

InformationURL
Name
Van Allen Probes Science Gateway, Mission Rules of the Road for Data Usage, JHU/APL
URL
https://rbspgway.jhuapl.edu/data_policy
Description

Van Allen Probes Science Gateway, Mission Rules of the Road for Data Usage, Applied Physics Laboratory at the Applied Physics Laboratory, Johns Hopkins University

InformationURL
Name
Van Allen Probes EMFISIS Home Page, UI
URL
http://emfisis.physics.uiowa.edu
Description

Van Allen Probes Electric and Magnetic Field Instrument Suite and Integrated Science, EMFISIS, Home Page at the University of Iowa

InformationURL
Name
Van Allen Probes EMFISIS Web Page with Mission and Instrument Team Links, UI
URL
http://emfisis.physics.uiowa.edu/about/instrument
Description

Van Allen Probes Electric and Magnetic Field Instrument Suite and Integrated Science, EMFISIS, Web Page with Mission and Instrument Team Links at the University of Iowa

InformationURL
Name
Van Allen Probes EMFISIS Data Access, UI
URL
http://emfisis.physics.uiowa.edu/data/index
Description

Van Allen Probes Electric and Magnetic Field Instrument Suite and Integrated Science, EMFISIS, Data Access including advanced Autoplot Graphics with Links to the Data Use Policy and Magnetometer Release Notes at the University of Iowa

PriorIDs
spase://VSPO/NumericalData/RBSP/B/EMFISIS/WFR/L4/Density/ElectronDensity
spase://VSPO/NumericalData/RBSP/B/EMFISIS/WaveformReceiver/ElectronDensity/Level4
spase://VSPO/NumericalData/RBSP/B/EMFISIS/WFR/L4/ElectronDensity/PT0.5S
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
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/rbsp/rbspb/l4/emfisis/density/
Description

Access to Data in CDF Format via ftp from SPDF

AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/rbsp/rbspb/l4/emfisis/density/
Description

Access to Data in CDF Format via http from SPDF

AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=RBSP-B_DENSITY_EMFISIS-L4&index=sp_phys
ProductKey
RBSP-B_DENSITY_EMFISIS-L4
Description

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

Format
CDF
Encoding
None
Acknowledgement
C.A. Kletzing. Please acknowledge the Data Providers and CDAWeb when using these Data.
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
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
RBSP-B_DENSITY_EMFISIS-L4
Description

Web Service to this product using the HAPI interface.

Format
CSV
Acknowledgement
C.A. Kletzing. Please acknowledge the Data Providers and CDAWeb when using these Data.
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/RBSP/B/EMFISIS
MeasurementType
MagneticField
MeasurementType
ThermalPlasma
MeasurementType
Waves.Passive
TemporalDescription
TimeSpan
StartDate
2012-09-28 04:59:40.000Z
StopDate
2015-07-01 04:09:03.000Z
Cadence
PT0.5S
ObservedRegion
Earth.Magnetosphere
ObservedRegion
Earth.Magnetosphere.Main
ObservedRegion
Earth.Magnetosphere.RadiationBelt
ObservedRegion
Earth.NearSurface.EquatorialRegion
Parameter #1
Name
Epoch Time
ParameterKey
Epoch
Description

Epoch Time, Default

Caveats
This Parameter exhibits an increasing Monotonic Progression.
Cadence
PT0.5S
Units
ns
UnitsConversion
1.0e-9>s
RenderingHints
AxisLabel
Time
ScaleType
LinearScale
ValidMin
1990-01-01T00:00:00.000000000
ValidMax
2029-12-31T23:59:58.999000000
FillValue
9999-12-31T23:59:59.999999999
Support
Qualifier
Scalar
SupportQuantity
Temporal
Parameter #2
Name
Digitized Frequency Point
Set
Time Series defined by using: EPOCH
ParameterKey
y
Description

Digitized Frequency Point, interpreted by using the Value of the Digitization Parameter, digi_type

Cadence
PT0.5S
Units
Hz
RenderingHints
DisplayType
TimeSeries
AxisLabel
Y
ValueFormat
F13.3
ScaleType
LogScale
ValidMin
0.0
ValidMax
1.0e+08
FillValue
-1.0e+31
Wave
WaveType
PlasmaWaves
Qualifier
Scalar
WaveQuantity
Frequency
Parameter #3
Name
Magnetic Field Magnitude
Set
Time Series defined by using: EPOCH
ParameterKey
bmag
Description

Magnetic Field Magnitude, used to infer the Electron Cyclotron Frequency, fce

Cadence
PT0.5S
Units
nT
UnitsConversion
1.0e-9>T
RenderingHints
DisplayType
TimeSeries
AxisLabel
B-MAG
ValueFormat
F13.3
ScaleType
LogScale
ValidMin
0.0
ValidMax
1.0e+20
FillValue
-1.0e+31
Field
Qualifier
Magnitude
Qualifier
Scalar
FieldQuantity
Magnetic
Parameter #4
Name
Electron Cyclotron Frequency
Set
Time Series defined by using: EPOCH
ParameterKey
fce
Description

Electron Cyclotron Frequency, fce

Cadence
PT0.5S
Units
Hz
RenderingHints
DisplayType
TimeSeries
AxisLabel
fce
ValueFormat
E12.2
ScaleType
LogScale
ValidMin
0.0
ValidMax
1.0e+20
FillValue
-1.0e+31
Wave
WaveType
PlasmaWaves
Qualifier
Scalar
WaveQuantity
Gyrofrequency
Parameter #5
Name
Electron Plasma Frequency
Set
Time Series defined by using: EPOCH
ParameterKey
fpe
Description

Electron Plasma Frequency, fpe

Cadence
PT0.5S
Units
Hz
RenderingHints
DisplayType
TimeSeries
AxisLabel
fpe
ValueFormat
E12.2
ScaleType
LogScale
ValidMin
0.0
ValidMax
1.0e+20
FillValue
-1.0e+31
Wave
WaveType
PlasmaWaves
Qualifier
Scalar
WaveQuantity
PlasmaFrequency
Parameter #6
Name
Ratio of Electron Plasma Oscillation Frequencies
Set
Time Series defined by using: EPOCH
ParameterKey
wpe_over_wce
Description

Ratio of Electron Plasma Oscillation Frequencies, the Electron Plasma Frequency, fpe, divided by the Electron Cyclotron Frequency, fce

Cadence
PT0.5S
RenderingHints
DisplayType
TimeSeries
AxisLabel
wpe/wce
ValueFormat
E12.2
ScaleType
LinearScale
ValidMin
0.0
ValidMax
1.0e+20
FillValue
-1.0e+31
Mixed
MixedQuantity
Other
ParticleType
Electron
Qualifier
Ratio
Parameter #7
Name
Upper Hybrid Resonance Frequency
Set
Time Series defined by using: EPOCH
ParameterKey
fuh
Description

Upper Hybrid Resonance Frequency, fuh

Cadence
PT0.5S
Units
Hz
RenderingHints
DisplayType
TimeSeries
AxisLabel
fuh
ValueFormat
E12.2
ScaleType
LogScale
ValidMin
0.0
ValidMax
1.0e+20
FillValue
-1.0e+31
Wave
WaveType
PlasmaWaves
Qualifier
Scalar
WaveQuantity
Frequency
Parameter #8
Name
Electron Density
Set
Time Series defined by using: EPOCH
ParameterKey
density
Description

Electron Density, inferred from the Spectrogram

Cadence
PT0.5S
Units
cm^-3
UnitsConversion
1.0e6>m^-3
RenderingHints
DisplayType
TimeSeries
AxisLabel
density
ValueFormat
E12.2
ScaleType
LogScale
ValidMin
0.0
ValidMax
1.0e+20
FillValue
-1.0e+31
Particle
ParticleType
Electron
Qualifier
Scalar
ParticleQuantity
NumberDensity
Parameter #9
Name
Digitization Type
Set
Time Series defined by using: EPOCH
ParameterKey
digi_type
Description

There are two Digitization Type Values: 'fuh' denotes that the Upper Hybrid Resonance Frequency, fuh, was digitized, or 'fpe' denotes that the Electron Plasma Frequency, fpe, was digitized by using Cutoffs. The digi_type Parameter is not for plotting.

Cadence
PT0.5S
RenderingHints
DisplayType
TimeSeries
AxisLabel
digi_type
ValueFormat
A11
Support
Qualifier
Scalar
SupportQuantity
InstrumentMode