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Data Access
SFR-A 2-hour spectrogram plots
DE 1 Plasma Wave Instrument (PWI) Sweep Frequency Receiver-A 2 Hour Dynamic Spectrogram Plots
var authors='Gurnett, Donald A.';
document.write(authors);
(2025).
DE 1 Plasma Wave Instrument (PWI) Sweep Frequency Receiver-A 2 Hour Dynamic Spectrogram Plots.
[Data set].
University of Iowa.
https://doi.org/10.48322/64bd-yr60. Accessed on document.write(currentDateStr);.
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ResourceID
spase://NASA/DisplayData/DE1/PWI/SFRA/PT2H
Description
This dataset contains two hour duration dynamic spectrogram GIF plots of the DE-1/PWI SFR-A (electric antenna). Each image is a plot of the power spectral density (V^2 m^-2 Hz^-1) of received signal (color scale) as a function of operating frequency (in a logarithmic scale on the vertical axis) and time (horizontal axis). At the top center of each plot is a title indicating the University of Iowa, the instrument, and the date. On the upper left is an indication of the receiver used, the upper right is the orbit number. Immediately below the title is a horizontal bar and the label "WB" on the extreme left indicating the time duration when wideband data were acquired. Beneath the time labels on the horizontal axis of the spectrogram are ephemeris data: position of the spacecraft in radial distance (Earth radii), McIlwain L-shell, magnetic local time, and geomagnetic latitude. Overlaid on each image are traces of the electron, hydrogen and oxygen cyclotron frequencies. Running along the left edge of the plot next to the frequency scale is the date represented as two digit year, day of year, hour and minute of the start of the plot.
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
DisplayData
ResourceID
spase://NASA/DisplayData/DE1/PWI/SFRA/PT2H
NamingAuthority
NASA
ResourceType
DisplayData
ResourceHeader
ResourceName
DE 1 Plasma Wave Instrument (PWI) Sweep Frequency Receiver-A 2 Hour Dynamic Spectrogram Plots
AlternateName
Dynamics Explorer 1 PWI SFR-A 2 hour Dynamic Spectrogram Plots.
AlternateName
DE-A PWI SFR-A 2 hour Dynamic Spectrogram Plots.
DOI
https://doi.org/10.48322/64bd-yr60
ReleaseDate
2026-02-25 20:57:18Z
RevisionHistory
RevisionEvent
ReleaseDate
2020-07-07 19:48:33Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-11-14 16:17:33Z
Note
Added PublicationInfo. 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 13:27:55Z
Note
Added MetadataRightsList. Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-02-25 20:57:18Z
Note
Added DOI. tlk
Description
This dataset contains two hour duration dynamic spectrogram GIF plots of the DE-1/PWI SFR-A (electric antenna). Each image is a plot of the power spectral density (V^2 m^-2 Hz^-1) of received signal (color scale) as a function of operating frequency (in a logarithmic scale on the vertical axis) and time (horizontal axis). At the top center of each plot is a title indicating the University of Iowa, the instrument, and the date. On the upper left is an indication of the receiver used, the upper right is the orbit number. Immediately below the title is a horizontal bar and the label "WB" on the extreme left indicating the time duration when wideband data were acquired. Beneath the time labels on the horizontal axis of the spectrogram are ephemeris data: position of the spacecraft in radial distance (Earth radii), McIlwain L-shell, magnetic local time, and geomagnetic latitude. Overlaid on each image are traces of the electron, hydrogen and oxygen cyclotron frequencies. Running along the left edge of the plot next to the frequency scale is the date represented as two digit year, day of year, hour and minute of the start of the plot.
PublicationInfo
Authors
Gurnett, Donald A.
PublicationDate
2025-11-14 16:17:33Z
PublishedBy
University of Iowa
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/Donald.A.Gurnett
2.
GeneralContact
spase://SMWG/Person/Ann.M.Persoon
InformationURL
Name
DE-1 Plasma Wave Investigation
URL
http://www-pw.physics.uiowa.edu/de/home.html
Description
DE-1 PWI page maintained at the University of Iowa with descriptions of the instrument, an interactive spectrogram viewer for creating summary plots and access to pregenerated dynamic spectrograms.
Language
en
InformationURL
Name
Plasma Wave Instrument page at the NSSDC Master Catalog
URL
https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1981-070A-02
Language
en
PriorIDs
spase://VWO/DisplayData/DynamicsExplorer1/PWI/DE1_PWI_SFR_A_GIF
spase://VWO/DisplayData/DynamicsExplorer1/PWI/SFR.A.PT2H
spase://VSPO/DisplayData/DynamicsExplorer1/PWI/SFR/A/PT2H
spase://VSPO/DisplayData/DE1/PWI/SFRA/PT2H
AccessInformation
RepositoryID
spase://SMWG/Repository/UIowa/RadioPlasmaWaveGroup
Availability
Online
AccessRights
Open
AccessURL
Name
SFR-A 2-hour spectrogram plots
URL
http://www-pw.physics.uiowa.edu/plasma-wave/de/sfr/gifs/a/
Description
Access to web pages listing GIF format plots for DE-1 PWI SFR-A dynamic spectrograms.
Language
en
Format
GIF
Encoding
None
InstrumentIDs
spase://SMWG/Instrument/DynamicsExplorer1/PWI
MeasurementType
Waves.Passive
TemporalDescription
TimeSpan
StartDate
1981-09-16 05:20:00Z
StopDate
1984-06-28 23:20:00Z
DisplayCadence
PT2H
ObservedRegion
Earth.Magnetosphere
ObservedRegion
Earth.NearSurface.Plasmasphere
ObservedRegion
Earth.NearSurface.AuroralRegion
ObservedRegion
Earth.NearSurface.PolarCap
ObservedRegion
Heliosphere.Inner
Keywords
Dynamic Spectrogram
Spectrogram
AKR
Auroral hiss
Auroral Kilometric Radiation
Banded emissions
Chorus
Continuum radiation
Electromagnetic Ion Cyclotron waves
EMIC
Electron Cyclotron Harmonics
Kilometric Continuum radiation
Myriametric radiation
Plasmaspheric Hiss
Solar radio burst
Terrestrial Kilometric Radiation
TKR
UHR
Upper hybrid resonance
Whistler mode
Whistlers
Parameter #1
Name
SFR-A Power Spectral Density
Units
V^2*m^-2*Hz^-1
Wave
WaveType
PlasmaWaves
Qualifier
Magnitude
Qualifier
Pseudo
WaveQuantity
ACElectricField
FrequencyRange
SpectralRange
RadioFrequency
Low
100
High
400000
Units
Hz