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/NumericalData/POLAR/PWI/HFWR/25kHz/Interferometry/PT0.000014S NASA NumericalData Polar Plasma Wave Instrument (PWI), High Frequency Waveform Receiver, 25kHz bandwidth interferometry fields https://doi.org/10.48322/06zn-yc02 2025-12-04T13:31:01Z 2021-04-27T15:38:11 Only known prior ReleaseDate of the metadata 2023-07-30T12:34:56.789 Added DOI and PublicationInfo minted by LFB, metadata versioned up to SPASE 2.6.0, reviewed by LFB 20230727 2025-08-05T13:12:20Z Added ObservedRegion(s). 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 value in Version tag. ZCB 2025-10-03T10:48:56Z Updated PublishedBy name to match ROR Registry. Added ResourceType and NamingAuthority. ZCB 2025-12-04T13:31:01Z Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB PWI>Plasma Wave Instrument Reference: Gurnett, D.A. et al, The Polar Plasma Wave Instrument, Space Science Reviews, Vol. 71, pp. 597-622, 1995. donald-gurnett@uiowa.edu An FFT on 1024 values was used in calibrating the data; i.e., perform FFT, calibrate in frequency domain, perform inverse FFT to get calibrated time series. Coordinate system used: antenna coordinate system, where the u-axis is offset by -45 degrees from the spacecraft x-axis, the v-axis is offset by -45 degrees from the spacecraft y-axis, and the z-axis is identical to the spacecraft z-axis. Effective bandwidth is 1.5*delta_f, where delta_f depends on the size of the FFT used to convert to the frequency domain, and delta_t. These data come in snapshots of 190902 points distributed among 2 to 6 channels every 9.2 seconds, where the duration of the snapshot is 0.045 seconds. Since Epoch time is in milliseconds, the times for the data points will not be unique unless the Delta_T in milliseconds is added to the Epoch time for the snapshot. The unattenuated frequency range for this file type is 20Hz to 25000Hz. The cadence value given here is computed from the inverse of the sampling rate (71.43 kHz). For a description of the PWI receivers and the different operational modes see: http://www-pw.physics.uiowa.edu/plasma-wave/istp/polar/modes.html UIowa, Donald A. Gurnett Gurnett, Donald, A.; Menietti, J., Douglas 2023-01-01T00:00:00 University of Iowa; Space Physics Data Facility spase://SMWG/Person/Donald.A.Gurnett PrincipalInvestigator spase://SMWG/Person/J.Douglas.Menietti Scientist spase://SMWG/Person/Jeremy.Faden MetadataContact spase://SMWG/Person/Lee.Frost.Bargatze MetadataContact Polar Plasma Wave Investigation (PWI) Data and User's Guides http://www-pw.physics.uiowa.edu/polar/data.html A Polar PWI page is maintained at the University of Iowa with descriptions of receivers and interpretation issues, user's guides, data availability tables, a form for creating summary plots and access to pregenerated dynamic spectrograms. en spase://VWO/NumericalData/POLAR/PWI/HFWR.25kHz.Interferometry.PT0.000014S spase://VSPO/NumericalData/POLAR/PWI/HFWR/25kHz/Interferometry/PT0.000014S spase://SMWG/Repository/UIowa/RadioPlasmaWaveGroup Online Open POLAR PWI H8 data web access http://www-pw.physics.uiowa.edu/polar/po_h8_pwi/ HTTP access to directories with Polar PWI H8 data files CDF None UIowa, Donald A. Gurnett spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb Online Open 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 NASA Heliophysics data products FTP access to files at SPDF https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=PO_H8_PWI&index=sp_phys PO_H8_PWI In CDF via FTP from SPDF HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/polar/pwi/pwi_h8/ In CDF via HTTP from SPDF CDF None UIowa, Donald. A. Gurnett and the Space Physics Data Facility at NASA/GSFC spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb Online Open 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 NASA Heliophysics data products CDAWeb https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=PO_H8_PWI&index=sp_phys PO_H8_PWI Plots, lists and files from CDAWeb of the data resource:PO_H8_PWI Text https://cdaweb.gsfc.nasa.gov/pub/data/polar/pwi/pwi_h8/$Y po_h8_pwi_$Y$m$d$H_$v.cdf spase://SMWG/Repository/NASA/GSFC/SPDF Online Open CDAWeb Programmatic Data Access https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/PO_H8_PWI/clientLibraryExample/ PO_H8_PWI Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS. Binary spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb Online Open 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 NASA Heliophysics data products CDAWeb HAPI Server https://cdaweb.gsfc.nasa.gov/hapi PO_H8_PWI Web Service to this product using the HAPI interface. CSV spase://SMWG/Instrument/POLAR/PWI Waves.Passive 1996-04-04T15:00:00.000 1997-09-14T19:00:00.000 The cadence value given here is computed from the inverse of the sampling rate (71.43 kHz). PT0.000014S Earth.Magnetosphere.Polar Earth.NearSurface.AuroralRegion Earth.Magnetosphere CDF Global Attribute TITLE: POLAR PWI HFWR CDF Global Attribute MISSION_GROUP: Polar CDF Global Attribute MISSION_GROUP: Magnetospheric Data CDF Global Attribute PROJECT: ISTP>International Solar-Terrestrial Physics CDF Global Attribute DATA_VERSION: 1 CDF Global Attribute DISCIPLINE: Space Physics>Magnetospheric Science CDF Global Attribute DATA_TYPE: H8>HFWR Interferometry, 14 usec CDF Global Attribute ADID_REF: NSSD2001 CDF Global Attribute MODS: Created Jan 2004 Auroral hiss Chorus Continuum radiation Equatorial Noise Plasmaspheric Hiss Langmuir Waves Electostatic Solitary Waves ESW Whistlers Ion Acoustic Waves Bernstein Waves Upper Hybrid Waves Lower Hybrid Waves Time Epoch Time, begin time of HFWR snapshot Gain changes may occur at these times ms Epoch 27-Feb-1996 00:00:00.000 29-Apr-2008 00:00:00.000 -1.0e+31 Temporal Gain for HFWR Channel 1 (Eu) This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. Gain1 Channel 1 Gain (HFWR) HFWR_Gain1 I3 0 30 -1 Other Gain for HFWR Channel 2 (Ev+) This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. Gain2 Channel 2 Gain (HFWR) HFWR_Gain2 I3 0 30 -1 Other Gain for HFWR Channel 3 (Ev-) This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. Gain3 Channel 3 Gain (HFWR) HFWR_Gain3 I3 0 30 -1 Other Gain for HFWR Magnetic Field (Bu, Bv, Bz) This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. MGain M Gain (HFWR) HFWR_MGain I3 0 30 -1 Other HFWR Elec. Field Antenna Eu (Channel 1) This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): HFWR Elec Field Antenna Ex (perp and outward in Local-Field Aligned/LFA coords). HFWR_Eu HFWR Elec. Ant. Eu When FFT is applied, Filter Rolls off at 25 kHz mV/m HFWR_Eu E12.4 -10.0 10.0 -1.0e+31 PlasmaWaves ACElectricField RadioFrequency 20 25000 Hz HFWR Elec. Field Antenna Ev+ (Channel 2) This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): HFWR Elec Field Antenna Ey (perp and eastward in Local-Field Aligned/LFA coords). HFWR_Evp HFWR Elec. Ant. Ev+ When FFT is applied, Filter Rolls off at 25 kHz mV/m HFWR_Ev+ E12.4 -10.0 10.0 -1.0e+31 PlasmaWaves ACElectricField RadioFrequency 20 25000 Hz HFWR Elec. Field Antenna Ev- (Channel 3) This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): HFWR Elec Field Antenna Ez (parallel in Local-Field Aligned/LFA coords). HFWR_Evm HFWR Elec. Ant. Ev- When FFT is applied, Filter Rolls off at 25 kHz mV/m HFWR_Ev- E12.4 -10.0 10.0 -1.0e+31 PlasmaWaves ACElectricField RadioFrequency 20 25000 Hz HFWR Mag. Field Antenna Bu (Channel 4) This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): HFWR Mag Field Antenna Bx (perp and outward in Local-Field Aligned/LFA coords). HFWR_Bu HFWR Mag. Ant. Bu When FFT is applied, Filter Rolls off at 25 kHz nT HFWR_Bu E12.4 -10.0 10.0 -1.0e+31 PlasmaWaves ACMagneticField RadioFrequency 20 25000 Hz HFWR Mag. Field Antenna Bv (Channel 5) This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): HFWR Mag Field Antenna By (perp and eastward in Local-Field Aligned/LFA coords). HFWR_Bv HFWR Mag. Ant. Bv When FFT is applied, Filter Rolls off at 25 kHz nT HFWR_Bv E12.4 -10.0 10.0 -1.0e+31 PlasmaWaves ACMagneticField RadioFrequency 20 25000 Hz HFWR Mag. Field Antenna Bz (Channel 6) This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): HFWR Mag Field Antenna Bz (parallel in Local-Field Aligned/LFA coords). HFWR_Bz HFWR Mag. Ant. Bz When FFT is applied, Filter Rolls off at 25 kHz nT HFWR_Bz E12.4 -10.0 10.0 -1.0e+31 PlasmaWaves ACMagneticField RadioFrequency 20 25000 Hz DATA_QUALITY Eu This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): Data Quality for Eu components (0 = OK, 1 = clipped or questionable). DATA_Q_Eu Data Quality for Eu components: 0 = OK, 1 = clipped or questionable (0=OK,1=Other) DATA Q Eu I2 0 1 -1 Other DATA_QUALITY Evp This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): Data Quality for Ev+ components (0 = OK, 1 = clipped or questionable). DATA_Q_Evp Data Quality for Ev+ components: 0 = OK, 1 = clipped or questionable (0=OK,1=Other) DATA Q Ev+ I2 0 1 -1 Other DATA_QUALITY Evm This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): Data Quality for Ev- components (0 = OK, 1 = clipped or questionable). DATA_Q_Evm Data Quality for Ev- components: 0 = OK, 1 = clipped or questionable (0=OK,1=Other) DATA Q Ev- I2 0 1 -1 Other DATA_Q Bu This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): Data Quality for Bu components (0 = OK, 1 = clipped or questionable). DATA_Q_Bu Data Quality for Bu components: 0 = OK, 1 = clipped or questionable (0=OK,1=Other) DATA Q Bu I2 0 1 -1 Other DATA_Q Bv This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): Data Quality for Bv components (0 = OK, 1 = clipped or questionable). DATA_Q_Bv Data Quality for Bv components: 0 = OK, 1 = clipped or questionable (0=OK,1=Other) DATA_Q Bv I2 0 1 -1 Other DATA_Q Bz This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC): Data Quality for Bz components (0 = OK, 1 = clipped or questionable). DATA_Q_Bz Data Quality for Bz components: 0 = OK, 1 = clipped or questionable (0=OK,1=Other) DATA Q Bz I2 0 1 -1 Other HFWR Elec. Field Antenna Eu Spectrogram This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC) HFWR_Eu_Spec Eu Spectrogram from 1024-element FFT When FFT is applied, Filter Rolls off at 25 kHz (V/m)^2/Hz Eu Spec E12.4 +1e-18 +1e-4 LogScale 1E-20 1E-2 -1.0e+31 PlasmaWaves ACElectricField RadioFrequency 20 25000 Hz HFWR Elec. Field Antenna Evp Spectrogram This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC) HFWR_Evp_Spec Ey Spectrogram from 1024-element FFT When FFT is applied, Filter Rolls off at 25 kHz (V/m)^2/Hz Evp Spec E12.4 1e-18 1e-4 LogScale 1E-20 1E-2 -1.0e+31 PlasmaWaves ACElectricField RadioFrequency 20 25000 Hz HFWR Elec. Field Antenna Evm Spectrogram This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC) HFWR_Evm_Spec Evm Spectrogram from 1024-element FFT When FFT is applied, Filter Rolls off at 25 kHz (V/m)^2/Hz Evm Spec E12.4 1E-18 1E-4 LogScale 1E-20 1E-2 -1.0e+31 PlasmaWaves ACElectricField RadioFrequency 20 25000 Hz HFWR Mag. Field Antenna Bu Spectrogram This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC) HFWR_Bu_Spec Bu Spectrogram from 1024-element FFT When FFT is applied, Filter Rolls off at 25 kHz nT^2/Hz Bu Spec E12.4 1E-14 1E+0 LogScale 1E-16 1E+2 -1.0e+31 PlasmaWaves ACMagneticField RadioFrequency 20 25000 Hz HFWR Mag. Field Antenna Bv Spectrogram This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC) HFWR_Bv_Spec Bv Spectrogram from 1024-element FFT When FFT is applied, Filter Rolls off at 25 kHz nT^2/Hz Bv Spec E12.4 1E-14 1E+0 LogScale 1E-16 1E+2 -1.0e+31 PlasmaWaves ACMagneticField RadioFrequency 20 25000 Hz HFWR Mag. Field Antenna Bz Spectrogram This parameter is in the set of parameters that depends on the CDF column with the Parameter Key, EPOCH, to specify the Time of Observation. EPOCH Catalog Description (CATDESC) HFWR_Bz_Spec Bz Spectrogram from 1024-element FFT When FFT is applied, Filter Rolls off at 25 kHz nT^2/Hz Bz Spec E12.4 1E-14 1E+0 LogScale 1E-16 1E+2 -1.0e+31 PlasmaWaves ACMagneticField RadioFrequency 20 25000 Hz