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Data Access
Survey Plots by Orbit Number
CRRES Plasma Wave Experiment Survey Dynamic Spectrogram Plots
var authors='Anderson, Roger R.; Mullen, E. G.; Gurnett, Donald A.';
document.write(authors);
(2025).
CRRES Plasma Wave Experiment Survey Dynamic Spectrogram Plots.
[Data set].
University of Iowa.
https://doi.org/10.48322/rwax-br78. Accessed on document.write(currentDateStr);.
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ResourceID
spase://NASA/DisplayData/CRRES/PWE/SFR_SA/Survey/DS/PT10H
Description
This dataset contains one-orbit duration dynamic spectrogram GIF plots of the CRRES/Plasma Wave Experiment Sweep Frequency Receiver and Multichannel Spectrum Analyzer (electric antenna). CRRES was launched on July 25, 1990, into a geosynchronous transfer orbit with perigee altitude of 350 km and an apogee 6.3Re (Earth radii) geocentric. The inclination was 18.2 deg, the orbital period was 9 h and 52 min, and the initial magnetic local time at apogee was 0800 MLT. The plasma wave experiment measures the electromagnetic and/or electrostatic fields detected by three sensors: 1) a 100 m tip-to-tip extendable fine wire long electric dipole antenna (designated WADA for wire antenna deployment assembly), 2) a search coil magnetometer mounted at the end of a 6-m boom, and 3) a 94-m sphere-to-sphere double probe electric antenna (designated SWDA for spherical-double-probe wire deployment assembly) which is part of the EF/LP experiment. The first two sensors are the primary sensors for the plasma wave experiment whereas the third sensor is the primary sensor for EF/LP experiment. Following the antenna extensions, the spacecraft was spun down to approximately 2 rpm. The normal mode of operation for the plasma wave experiment after the antenna extensions has been to have the sweep frequency receiver locked onto the WADA antenna and the multichannel analyzer cycling through all three antennas. The basic CRRES plasma wave experiment instrumentation includes two receivers: 1) a multichannel spectrum analyzer to provide high-time-resolution spectra from 5.6 Hz to 10kHz, and 2) a sweep frequency receiver for high-frequency- resolution spectrum measurements from 100 Hz to 400 kHz. Each plot shows a plasma wave spectrogram for a one orbit (roughly 10 hour) period. The spectrograms cover the frequency range from 5.6 Hz to 400 kHz presented on a logarithmic scale. The data from 5.6-100 Hz are the measurements from the multichannel spectrum analyzer during the portions of its cycling when it is connected to the WADA antenna. Additional marks along the frequency axis indicate the boundaries between bands on the sweep frequency receiver. Band 1 extends from 100 to 800 Hz, Band 2 from 800 to 6.4 kHz, Band 3 from 6.4 to 50 kHz and Band 4 from 50 to 400 kHz. The intensity of the waves are color-coded and are in units of db(V/m/root(Hz)). The red line superimposed on each plot shows the electron cyclotron frequency calculated from the fluxgate magnetometer experiment. The time resolution above 6.4 kHz is one spectrum every 8s. The striations apparent in some emissions are a result of the beating between the spin rate and the sampling rate. Across the top of the figure is "CRRES SFR/SA" for the CRRES Plasma Wave Experiment Sweep Frequency Receiver and Multichannel Spectrum Analyzer, the units of the color scale is provided as well as the color bar with maximum and minimum values. Beneath the time axis is CRRES orbital information: Radial distance in Earth radii, Magnetic Latitude, Magnetic Local Time and L-shell. Along the left edge of the figure is the orbit number followed by the date. Along the right edge of the figure is "The University of Iowa/AFGL" the name of the software package used to create the plots and the date and time in which the plot was created.
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/CRRES/PWE/SFR_SA/Survey/DS/PT10H
NamingAuthority
NASA
ResourceType
DisplayData
ResourceHeader
ResourceName
CRRES Plasma Wave Experiment Survey Dynamic Spectrogram Plots
DOI
https://doi.org/10.48322/rwax-br78
ReleaseDate
2026-02-25 20:57:17Z
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 20:57:17Z
Note
Added DOI. tlk
Description
This dataset contains one-orbit duration dynamic spectrogram GIF plots of the CRRES/Plasma Wave Experiment Sweep Frequency Receiver and Multichannel Spectrum Analyzer (electric antenna). CRRES was launched on July 25, 1990, into a geosynchronous transfer orbit with perigee altitude of 350 km and an apogee 6.3Re (Earth radii) geocentric. The inclination was 18.2 deg, the orbital period was 9 h and 52 min, and the initial magnetic local time at apogee was 0800 MLT. The plasma wave experiment measures the electromagnetic and/or electrostatic fields detected by three sensors: 1) a 100 m tip-to-tip extendable fine wire long electric dipole antenna (designated WADA for wire antenna deployment assembly), 2) a search coil magnetometer mounted at the end of a 6-m boom, and 3) a 94-m sphere-to-sphere double probe electric antenna (designated SWDA for spherical-double-probe wire deployment assembly) which is part of the EF/LP experiment. The first two sensors are the primary sensors for the plasma wave experiment whereas the third sensor is the primary sensor for EF/LP experiment. Following the antenna extensions, the spacecraft was spun down to approximately 2 rpm. The normal mode of operation for the plasma wave experiment after the antenna extensions has been to have the sweep frequency receiver locked onto the WADA antenna and the multichannel analyzer cycling through all three antennas. The basic CRRES plasma wave experiment instrumentation includes two receivers: 1) a multichannel spectrum analyzer to provide high-time-resolution spectra from 5.6 Hz to 10kHz, and 2) a sweep frequency receiver for high-frequency- resolution spectrum measurements from 100 Hz to 400 kHz. Each plot shows a plasma wave spectrogram for a one orbit (roughly 10 hour) period. The spectrograms cover the frequency range from 5.6 Hz to 400 kHz presented on a logarithmic scale. The data from 5.6-100 Hz are the measurements from the multichannel spectrum analyzer during the portions of its cycling when it is connected to the WADA antenna. Additional marks along the frequency axis indicate the boundaries between bands on the sweep frequency receiver. Band 1 extends from 100 to 800 Hz, Band 2 from 800 to 6.4 kHz, Band 3 from 6.4 to 50 kHz and Band 4 from 50 to 400 kHz. The intensity of the waves are color-coded and are in units of db(V/m/root(Hz)). The red line superimposed on each plot shows the electron cyclotron frequency calculated from the fluxgate magnetometer experiment. The time resolution above 6.4 kHz is one spectrum every 8s. The striations apparent in some emissions are a result of the beating between the spin rate and the sampling rate. Across the top of the figure is "CRRES SFR/SA" for the CRRES Plasma Wave Experiment Sweep Frequency Receiver and Multichannel Spectrum Analyzer, the units of the color scale is provided as well as the color bar with maximum and minimum values. Beneath the time axis is CRRES orbital information: Radial distance in Earth radii, Magnetic Latitude, Magnetic Local Time and L-shell. Along the left edge of the figure is the orbit number followed by the date. Along the right edge of the figure is "The University of Iowa/AFGL" the name of the software package used to create the plots and the date and time in which the plot was created.
PublicationInfo
Authors
Anderson, Roger R.; Mullen, E. G.; 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/Roger.R.Anderson
2.
PrincipalInvestigator
spase://SMWG/Person/E.Gary.Mullen
3.
CoInvestigator
spase://SMWG/Person/Donald.A.Gurnett
InformationURL
Name
Combined Release and Radiation Effects Satellite (CRRES) Plasma Wave Experiment
URL
http://www-pw.physics.uiowa.edu/crres/
Description
CRRES PWE page maintained at the University of Iowa with descriptions of the instrument, a list of CRRES publications, an link to a Java spectrogram viewer for the summary plots and access to pregenerated dynamic spectrograms.
Language
en
InformationURL
Name
Plasma Wave Experiment page at the NSSDC Master Catalog
URL
https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1990-065A-20
Language
en
PriorIDs
spase://VWO/DisplayData/CRRES/PWE/CRRES_PWE_SFR_SA_GIF_PT8S
spase://VWO/DisplayData/CRRES/PWE/SFR.SA/Survey.DS.PT10H
spase://VSPO/DisplayData/CRRES/PWE/SFR_SA/Survey/DS/PT10H
AccessInformation
RepositoryID
spase://SMWG/Repository/UIowa/RadioPlasmaWaveGroup
Availability
Online
AccessRights
Open
AccessURL
Name
Survey Plots by Orbit Number
URL
http://www-pw.physics.uiowa.edu/plasma-wave/crres/GIF/
Description
Access to GIF format plots for CRRES PWE dynamic spectrograms.
Language
en
Format
GIF
Encoding
None
InstrumentIDs
spase://SMWG/Instrument/CRRES/PWE
MeasurementType
Waves.Passive
TemporalDescription
TimeSpan
StartDate
1990-08-01 17:35:00Z
StopDate
1991-10-12 00:45:00Z
Cadence
PT8S
DisplayCadence
PT10H
ObservedRegion
Earth.Magnetosphere
ObservedRegion
Earth.NearSurface.Plasmasphere
ObservedRegion
Earth.NearSurface.AuroralRegion
ObservedRegion
Earth.NearSurface.PolarCap
ObservedRegion
Heliosphere.Inner
Caveats
The striations apparent in some emissions are a result of the beating between the spin rate and the sampling rate. Data gaps may appear as white vertical bars, the last acquired sweep may also occasionally spread through data gaps.
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
Electric Field Spectral Density
Units
db(V/m/root(Hz))
Wave
WaveType
PlasmaWaves
Qualifier
Magnitude
Qualifier
Pseudo
WaveQuantity
ACElectricField
FrequencyRange
SpectralRange
RadioFrequency
Low
5.6
High
400000
Units
Hz