2.2.9 spase://NASA/DisplayData/POLAR/PWI/MCA/DS/P1D POLAR Plasma Wave Investigation (PWI) Multichannel Analyzer (MCA) Survey Spectrograms 2020-07-07T19:48:34Z 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. spase://SMWG/Person/Donald.A.Gurnett PrincipalInvestigator spase://SMWG/Person/J.Douglas.Menietti GeneralContact Polar Plasma Wave Investigation (PWI) Data and User's Guides http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/data.html 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. en User's Guide to PWI Receiver Design Features and Modes http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/modes.html Descriptions of PWI receiver and antenna modes. en spase://NASA/NumericalData/POLAR/PWI/MCA/PT1.3S DerivedFrom spase://VWO/DisplayData/POLAR/PWI/MCA.DS.P1D spase://VSPO/DisplayData/POLAR/PWI/MCA/DS/P1D spase://SMWG/Repository/UIowa/RadioPlasmaWaveGroup Online Open PWI Multichannel Analyzer Survey and Eclipse Data http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/mca/ Access to web pages listing GIF format plots for Polar PWI MCA dynamic spectrograms. en GIF None spase://SMWG/Instrument/POLAR/PWI Waves.Passive Spectrum ElectricField MagneticField 1996-03-25T00:00:00Z 1997-09-16T17:00:00Z RadioFrequency P1D Earth.Magnetosphere Earth.NearSurface.Plasmasphere Earth.NearSurface.AuroralRegion Earth.NearSurface.PolarCap Heliosphere.Inner 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 MCA Electric Power Spectral Density See the web page on Polar PWI Interpretation Issues http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/interpretation.html P1D V^2 m^-2 Hz^-1 PlasmaWaves Magnitude Pseudo ACElectricField RadioFrequency 0.0056 311 kHz MCA Magnetic Power Spectral Density See the web page on Polar PWI Interpretation Issues http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/interpretation.html P1D nT^2 * Hz^-1 PlasmaWaves Magnitude Pseudo ACMagneticField RadioFrequency 0.0056 10 kHz