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Data Access
Sweep Frequency Receiver (SFR) Survery Spectrograms - SFR Electric Antenna (Receiver A)
POLAR Plasma Wave Investigation (PWI) SFR-Sweep Frequency Receiver-A (SFR-A) Daily Dynamic Spectrograms
var authors='Gurnett, Donald A.';
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(2025).
POLAR Plasma Wave Investigation (PWI) SFR-Sweep Frequency Receiver-A (SFR-A) Daily Dynamic Spectrograms.
[Data set].
University of Iowa.
https://doi.org/10.48322/2ff4-3587. Accessed on document.write(currentDateStr);.
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ResourceID
spase://NASA/DisplayData/POLAR/PWI/SFR/A/DS/P1D
Description
The Polar Sweep Frequency Receiver-A (SFR-A) made use of either the Eu (130 m, spin-plane) or Ez (14 m, spin axis) two-sphere electric dipole antennas. Between March 25, 1996 and May 26, 1996, the Eu antenna was the default antenna, from May 27, 1996 through February 9, 1997 the Ez antenna was used and from February 10, 1997 until September 17, 1997 the SFR-A returned to using the Eu antenna. The SFR-A receiver spanned the frequency range from 26 Hz to 808 kHz in 5 bands: 26-200 Hz, 0.2 - 1.6 kHz, 1.7 - 12.6 kHz, 13-100 kHz, 100-808 kHz. Each image is a daily 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 vertical axis) and time (horizontal axis). At the top of each plot is a title indicating the Instrument, Receiver and Antenna used followed by the time span for the spectrogram. Beneath the time labels on the horizontal axis are ephemeris data: position of the spacecraft in radial distance (Earth radii), geomagnetic latitude, magnetic local time, and McIlwain L-shell. Overlaid on each image is a trace of the electron gyrofrequency.
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/POLAR/PWI/SFR/A/DS/P1D
NamingAuthority
NASA
ResourceType
DisplayData
ResourceHeader
ResourceName
POLAR Plasma Wave Investigation (PWI) SFR-Sweep Frequency Receiver-A (SFR-A) Daily Dynamic Spectrograms
DOI
https://doi.org/10.48322/2ff4-3587
ReleaseDate
2026-02-25 20:57:21Z
RevisionHistory
RevisionEvent
ReleaseDate
2020-07-07 19:48:34Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-11-14 16:17:34Z
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 13:28:00Z
Note
Added MetadataRightsList. Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-02-25 20:57:21Z
Note
Added DOI. tlk
Description
The Polar Sweep Frequency Receiver-A (SFR-A) made use of either the Eu (130 m, spin-plane) or Ez (14 m, spin axis) two-sphere electric dipole antennas. Between March 25, 1996 and May 26, 1996, the Eu antenna was the default antenna, from May 27, 1996 through February 9, 1997 the Ez antenna was used and from February 10, 1997 until September 17, 1997 the SFR-A returned to using the Eu antenna. The SFR-A receiver spanned the frequency range from 26 Hz to 808 kHz in 5 bands: 26-200 Hz, 0.2 - 1.6 kHz, 1.7 - 12.6 kHz, 13-100 kHz, 100-808 kHz. Each image is a daily 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 vertical axis) and time (horizontal axis). At the top of each plot is a title indicating the Instrument, Receiver and Antenna used followed by the time span for the spectrogram. Beneath the time labels on the horizontal axis are ephemeris data: position of the spacecraft in radial distance (Earth radii), geomagnetic latitude, magnetic local time, and McIlwain L-shell. Overlaid on each image is a trace of the electron gyrofrequency.
PublicationInfo
Authors
Gurnett, Donald A.
PublicationDate
2025-11-14 16:17:34Z
PublishedBy
University of Iowa
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/Donald.A.Gurnett
2.
GeneralContact
spase://SMWG/Person/J.Douglas.Menietti
InformationURL
Name
Polar Plasma Wave Investigation (PWI) Data and User's Guides
URL
http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/data.html
Description
A Polar PWI page is maintained at the University of Iowa with descriptions of interpretation issues, user's guides, data availability tables, a form for creating summary plots and access to pregenerated dynamic spectrograms.
Language
en
InformationURL
Name
User's Guide to PWI Receiver Design Features and Modes
URL
http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/modes.html
Description
Descriptions of PWI receiver and antenna modes.
Language
en
PriorIDs
spase://VWO/DisplayData/POLAR/PWI/Polar_PWI_SFR_A_Daily_DS_GIF
spase://VWO/DisplayData/POLAR/PWI/SFR.A.DS.P1D
spase://VSPO/DisplayData/POLAR/PWI/SFR/A/DS/P1D
AccessInformation
RepositoryID
spase://SMWG/Repository/UIowa/RadioPlasmaWaveGroup
Availability
Online
AccessRights
Open
AccessURL
Name
Sweep Frequency Receiver (SFR) Survery Spectrograms - SFR Electric Antenna (Receiver A)
URL
http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/sfr/electric/
Description
Access to web pages listing GIF format plots for Polar PWI SFR-A dynamic spectrograms.
Language
en
Format
GIF
Encoding
None
InstrumentIDs
spase://SMWG/Instrument/POLAR/PWI
MeasurementType
Waves.Passive
MeasurementType
Spectrum
MeasurementType
ElectricField
TemporalDescription
TimeSpan
StartDate
1996-03-25 00:00:00Z
StopDate
1997-09-16 17:00:00Z
SpectralRange
RadioFrequency
DisplayCadence
P1D
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
Broadband Electrostatic Noise
BEN
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
Caveats
See the web page on Polar PWI Interpretation Issues http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/interpretation.html
Units
V^2*m^-2*Hz^-1
Wave
WaveType
PlasmaWaves
Qualifier
Magnitude
Qualifier
Pseudo
WaveQuantity
ACElectricField
FrequencyRange
SpectralRange
RadioFrequency
Low
26
High
808
Units
kHz