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POLAR Plasma Wave Investigation (PWI) Multichannel Analyzer (MCA) Survey Spectrograms

ResourceID
spase://NASA/DisplayData/POLAR/PWI/MCA/DS/P1D

Description

The Polar PWI Multichannel Analyzer (MCA) collected data from March 1996 to September 1997. The MCA data has very good time resolution (~1 s) but relatively poor frequency resolution. An electric field measurement covers 5.6 Hz to 311 kHz in 20 channels logarithmically spaced. The magnetic field measurements cover a range from 5.6 Hz to 10 kHz in 14 channels logarithmically spaced. Each file consists of two plots. Each plot contains the power spectral density (color scale) of received signal (upper plot: electric (V^2 m^-2 Hz^-1), lower plot: magnetic (nT^2 Hz^-1) ) 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 along with the time span for the spectrogram. Overlaid on each image is a trace of the electron gyrofrequency. Beneath the time labels on the horizontal axis of the lower plot 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. Reference: Gurnett, D.A. et al, The Polar plasma wave instrument, Space Science Reviews, Vol. 71, pp. 597-622, 1995.

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Details

Version:2.2.9

DisplayData

ResourceID
spase://NASA/DisplayData/POLAR/PWI/MCA/DS/P1D
ResourceHeader
ResourceName
POLAR Plasma Wave Investigation (PWI) Multichannel Analyzer (MCA) Survey Spectrograms
ReleaseDate
2020-07-07 19:48:34Z
Description

The Polar PWI Multichannel Analyzer (MCA) collected data from March 1996 to September 1997. The MCA data has very good time resolution (~1 s) but relatively poor frequency resolution. An electric field measurement covers 5.6 Hz to 311 kHz in 20 channels logarithmically spaced. The magnetic field measurements cover a range from 5.6 Hz to 10 kHz in 14 channels logarithmically spaced. Each file consists of two plots. Each plot contains the power spectral density (color scale) of received signal (upper plot: electric (V^2 m^-2 Hz^-1), lower plot: magnetic (nT^2 Hz^-1) ) 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 along with the time span for the spectrogram. Overlaid on each image is a trace of the electron gyrofrequency. Beneath the time labels on the horizontal axis of the lower plot 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. Reference: Gurnett, D.A. et al, The Polar plasma wave instrument, Space Science Reviews, Vol. 71, pp. 597-622, 1995.

Contacts
RolePersonStartDateStopDateNote
1.PrincipalInvestigatorspase://SMWG/Person/Donald.A.Gurnett
2.GeneralContactspase://SMWG/Person/J.Douglas.Menietti
InformationURL
Name
Polar Plasma Wave Investigation (PWI) Data and User's Guides
URL
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
Description

Descriptions of PWI receiver and antenna modes.

Language
en
Association
AssociationID
AssociationType
DerivedFrom
PriorIDs
spase://VWO/DisplayData/POLAR/PWI/MCA.DS.P1D
spase://VSPO/DisplayData/POLAR/PWI/MCA/DS/P1D
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
PWI Multichannel Analyzer Survey and Eclipse Data
URL
Description

Access to web pages listing GIF format plots for Polar PWI MCA dynamic spectrograms.

Language
en
Format
GIF
Encoding
None
InstrumentIDs
MeasurementType
Waves.Passive
MeasurementType
Spectrum
MeasurementType
ElectricField
MeasurementType
MagneticField
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
MCA Electric 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
Cadence
P1D
Units
V^2 m^-2 Hz^-1
Wave
WaveType
PlasmaWaves
Qualifier
Magnitude
Qualifier
Pseudo
WaveQuantity
ACElectricField
FrequencyRange
SpectralRange
RadioFrequency
Low
0.0056
High
311
Units
kHz
Parameter #2
Name
MCA Magnetic 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
Cadence
P1D
Units
nT^2 * Hz^-1
Wave
WaveType
PlasmaWaves
Qualifier
Magnitude
Qualifier
Pseudo
WaveQuantity
ACMagneticField
FrequencyRange
SpectralRange
RadioFrequency
Low
0.0056
High
10
Units
kHz