2.7.1 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NASA/NumericalData/RBSP/B/EMFISIS/WFR/L4/ElectronDensity/PT0.5S NASA NumericalData 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 https://doi.org/10.48322/c6s1-wg66 2025-12-04T13:31:18Z 2021-04-27T15:38:11 Only known prior ReleaseDate of the metadata 2022-08-18T12:34:56.789 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 2023-07-04T12:34:56.789 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 2025-09-18T10:49:18Z 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 2025-10-03T10:49:07Z Updated PublishedBy name to match ROR Registry. ZCB 2025-12-04T13:31:18Z Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB 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. W. S. Kurth, S. De Pascuale, J. B. Faden, C. A. Kletzing, G. B. Hospodarsky, S. A. Thaller, and J. R. Wygant W. S. Kurth, S. De Pascuale, J. B. Faden, C. A. Kletzing, G. B. Hospodarsky, S. A. Thaller, and J. R. Wygant 2022-01-01T00:00:00 Space Physics Data Facility spase://SMWG/Person/William.S.Kurth PrincipalInvestigator spase://SMWG/Person/Sebastian.De Pascuale Scientist spase://SMWG/Person/Jeremy.B.Faden Scientist spase://SMWG/Person/Craig.A.Kletzing Scientist spase://SMWG/Person/George.B.Hospodarsky Scientist spase://SMWG/Person/Scott.A.Thaller Scientist spase://SMWG/Person/John.R.Wygant Scientist spase://SMWG/Person/Scott.Boardsen MetadataContact spase://SMWG/Person/Robert.M.Candey MetadataContact spase://SMWG/Person/Lee.Frost.Bargatze MetadataContact 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 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2014JA020857 This paper details how electron density was inferred primarily from the upper hybrid resonance frequency. Van Allen Probes Home Page, JHU/APL https://vanallenprobes.jhuapl.edu Van Allen Probes Home Page, Exploring Earth's Radiation Belts and the Extremes of Space Weather, Applied Physics Laboratory, Johns Hopkins University Van Allen Probes Science Gateway for access to Data, Models, Software and Tools for Researchers, Students and the General Public, JHU/APL https://rbspgway.jhuapl.edu/ 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 Van Allen Probes Science Gateway, Mission Rules of the Road for Data Usage, JHU/APL https://rbspgway.jhuapl.edu/data_policy Van Allen Probes Science Gateway, Mission Rules of the Road for Data Usage, Applied Physics Laboratory at the Applied Physics Laboratory, Johns Hopkins University Van Allen Probes EMFISIS Home Page, UI http://emfisis.physics.uiowa.edu Van Allen Probes Electric and Magnetic Field Instrument Suite and Integrated Science, EMFISIS, Home Page at the University of Iowa Van Allen Probes EMFISIS Web Page with Mission and Instrument Team Links, UI http://emfisis.physics.uiowa.edu/about/instrument 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 Van Allen Probes EMFISIS Data Access, UI http://emfisis.physics.uiowa.edu/data/index 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 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 spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb Online Open https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/rbsp/rbspb/l4/emfisis/density/ Access to Data in CDF Format via ftp from SPDF HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/rbsp/rbspb/l4/emfisis/density/ Access to Data in CDF Format via http from SPDF CDAWeb https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=RBSP-B_DENSITY_EMFISIS-L4&index=sp_phys RBSP-B_DENSITY_EMFISIS-L4 Access to ASCII, CDF, and Plots via NASA/GSFC CDAWeb CDF None https://cdaweb.gsfc.nasa.gov/pub/data/rbsp/rbspb/l4/emfisis/density/$Y rbsp-b_density_emfisis-l4_$Y$m$d_$v.cdf C.A. Kletzing. Please acknowledge the Data Providers and CDAWeb when using these Data. spase://SMWG/Repository/NASA/GSFC/SPDF Online Open CDAWeb Programmatic Data Access https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/RBSP-B_DENSITY_EMFISIS-L4/clientLibraryExample/ RBSP-B_DENSITY_EMFISIS-L4 Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS. Binary C.A. Kletzing. Please acknowledge the Data Providers and CDAWeb when using these Data. spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb Online Open https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products CDAWeb HAPI Server https://cdaweb.gsfc.nasa.gov/hapi RBSP-B_DENSITY_EMFISIS-L4 Web Service to this product using the HAPI interface. CSV C.A. Kletzing. Please acknowledge the Data Providers and CDAWeb when using these Data. Calibrated spase://SMWG/Instrument/RBSP/B/EMFISIS MagneticField ThermalPlasma Waves.Passive 2012-09-28T04:59:40.000 2015-07-01T04:09:03.000 PT0.5S Earth.Magnetosphere Earth.Magnetosphere.Main Earth.Magnetosphere.RadiationBelt Earth.NearSurface.EquatorialRegion Epoch Time Epoch Epoch Time, Default This Parameter exhibits an increasing Monotonic Progression. PT0.5S ns 1.0e-9>s Time LinearScale 1990-01-01T00:00:00.000000000 2029-12-31T23:59:58.999000000 9999-12-31T23:59:59.999999999 Scalar Temporal Digitized Frequency Point Time Series defined by using: EPOCH y Digitized Frequency Point, interpreted by using the Value of the Digitization Parameter, digi_type PT0.5S Hz TimeSeries Y F13.3 LogScale 0.0 1.0e+08 -1.0e+31 PlasmaWaves Scalar Frequency Magnetic Field Magnitude Time Series defined by using: EPOCH bmag Magnetic Field Magnitude, used to infer the Electron Cyclotron Frequency, fce PT0.5S nT 1.0e-9>T TimeSeries B-MAG F13.3 LogScale 0.0 1.0e+20 -1.0e+31 Magnitude Scalar Magnetic Electron Cyclotron Frequency Time Series defined by using: EPOCH fce Electron Cyclotron Frequency, fce PT0.5S Hz TimeSeries fce E12.2 LogScale 0.0 1.0e+20 -1.0e+31 PlasmaWaves Scalar Gyrofrequency Electron Plasma Frequency Time Series defined by using: EPOCH fpe Electron Plasma Frequency, fpe PT0.5S Hz TimeSeries fpe E12.2 LogScale 0.0 1.0e+20 -1.0e+31 PlasmaWaves Scalar PlasmaFrequency Ratio of Electron Plasma Oscillation Frequencies Time Series defined by using: EPOCH wpe_over_wce Ratio of Electron Plasma Oscillation Frequencies, the Electron Plasma Frequency, fpe, divided by the Electron Cyclotron Frequency, fce PT0.5S TimeSeries wpe/wce E12.2 LinearScale 0.0 1.0e+20 -1.0e+31 Other Electron Ratio Upper Hybrid Resonance Frequency Time Series defined by using: EPOCH fuh Upper Hybrid Resonance Frequency, fuh PT0.5S Hz TimeSeries fuh E12.2 LogScale 0.0 1.0e+20 -1.0e+31 PlasmaWaves Scalar Frequency Electron Density Time Series defined by using: EPOCH density Electron Density, inferred from the Spectrogram PT0.5S cm^-3 1.0e6>m^-3 TimeSeries density E12.2 LogScale 0.0 1.0e+20 -1.0e+31 Electron Scalar NumberDensity Digitization Type Time Series defined by using: EPOCH digi_type 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. PT0.5S TimeSeries digi_type A11 Scalar InstrumentMode