2.7.1 https://spdx.org/licenses/ SPDX CC0-1.0 https://spdx.org/licenses/CC0-1.0.html Creative Commons Zero v1.0 Universal CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions spase://NASA/DisplayData/DE1/PWI/SFRA/PT2H NASA DisplayData DE 1 Plasma Wave Instrument (PWI) Sweep Frequency Receiver-A 2 Hour Dynamic Spectrogram Plots Dynamics Explorer 1 PWI SFR-A 2 hour Dynamic Spectrogram Plots. DE-A PWI SFR-A 2 hour Dynamic Spectrogram Plots. 2025-12-04T13:27:55Z 2020-07-07T19:48:33Z Only known prior ReleaseDate of the metadata 2025-11-14T16:17:33Z 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 2025-12-04T13:27:55Z Added MetadataRightsList. Updated to 2.7.1. ZCB 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. Gurnett, Donald A. 2025-11-14T16:17:33Z University of Iowa spase://SMWG/Person/Donald.A.Gurnett PrincipalInvestigator spase://SMWG/Person/Ann.M.Persoon GeneralContact DE-1 Plasma Wave Investigation http://www-pw.physics.uiowa.edu/de/home.html 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. en Plasma Wave Instrument page at the NSSDC Master Catalog https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1981-070A-02 en 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 spase://SMWG/Repository/UIowa/RadioPlasmaWaveGroup Online Open SFR-A 2-hour spectrogram plots http://www-pw.physics.uiowa.edu/plasma-wave/de/sfr/gifs/a/ Access to web pages listing GIF format plots for DE-1 PWI SFR-A dynamic spectrograms. en GIF None spase://SMWG/Instrument/DynamicsExplorer1/PWI Waves.Passive 1981-09-16T05:20:00Z 1984-06-28T23:20:00Z PT2H Earth.Magnetosphere Earth.NearSurface.Plasmasphere Earth.NearSurface.AuroralRegion Earth.NearSurface.PolarCap Heliosphere.Inner 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 SFR-A Power Spectral Density V^2*m^-2*Hz^-1 PlasmaWaves Magnitude Pseudo ACElectricField RadioFrequency 100 400000 Hz