2.2.2 spase://VWO/NumericalData/POLAR/PWI/HFWR.25kHz.PT0.000014S Polar Plasma Wave Instrument, High Frequency Waveform Receiver, 25kHz bandwidth, 6-channel fields 2012-11-14T00:00:00Z 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: local magnetic field-aligned, a spacecraft centered coordinate system where Z is parallel to the local B-field determined from Polar MFE, X points outward and lies in the plane defined by the Z-axis and the radial vector from the earth to the spacecraft, and Y completes a right-handed system and points eastward. The X- and Z-axes are contained in the north-south plane. 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 31816 points per channel, every 9.2 seconds, where the duration of each snapshot is 0.045 seconds. The time for individual samples is the epoch time of the snapshot incremented by delta_t in milliseconds for each successive sample. That is: sample_time = epoch_time + sample_offset * delta_t The data in this file will be in sets of 31744 (31*1024) points per channel because the FFT size does not come out even within the number of points per snapshot. To obtain the time for each point in the snapshot, increment each Epoch time after the first with Delta_T (in ms). 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 spase://SMWG/Person/Donald.A.Gurnett PrincipalInvestigator spase://SMWG/Person/J.Douglas.Menietti Scientist spase://SMWG/Person/Jeremy.Faden 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, interpretation issues, user's guides, data availability tables, a form for creating summary plots and access to pregenerated dynamic spectrograms. en spase://SMWG/Repository/UIowa/RadioPlasmaWaveGroup Online Open POLAR PWI H7 data web access http://www-pw.physics.uiowa.edu/polar/po_h7_pwi/ HTTP access to directories with Polar PWI H7 data files CDF None UIowa, Donald A. Gurnett spase://SMWG/Repository/NASA/GSFC/SPDF Online Open FTP access to files at SPDF ftp://spdf.gsfc.nasa.gov/pub/data/polar/pwi/pwi_h7 PO_H7_PWI In CDF via FTP from SPDF HTTP access to files at SPDF http://spdf.gsfc.nasa.gov/pub/data/polar/pwi/pwi_h7/ 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 Online Open CDAWeb http://cdaweb.gsfc.nasa.gov/sp_phys/ PO_H7_PWI Plots, lists and files from CDAWeb of the data resource:PO_H7_PWI Text spase://SMWG/Instrument/POLAR/PWI Waves.Passive 1996-03-26T15:00:00.000 1997-09-16T17:00:00.000 The cadence value given here is computed from the inverse of the sampling rate (71.43 kHz). PT0.000014S 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: 2 CDF Global Attribute DISCIPLINE: Space Physics>Magnetospheric Science CDF Global Attribute DATA_TYPE: H7>HFWR 6-channel, 14 usec CDF Global Attribute ADID_REF: NSSD2001 CDF Global Attribute MODS: Created Feb 2012 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 (Ex) 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) dB Ex_Gain I2 0 30 -1 Other Gain for HFWR Channel 2 (Ey) 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) dB Ey_Gain I2 0 30 -1 Other Gain for HFWR Channel 3 (Ez) 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) Ez_Gain I2 0 30 -1 Other Gain for HFWR Magnetic Field (Bx, By, 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 I2 0 30 -1 Other HFWR Elec. Field Antenna Ex 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_Ex HFWR Elec Field Antenna Ex (perp and outward in Local-Field Aligned/LFA coords) When FFT is applied, Filter Rolls off at 25 kHz mV/m HFWR_Ex (LFA) E12.4 -10.0 10.0 -1.0e+31 PlasmaWaves ACElectricField RadioFrequency 20 25000 Hz HFWR Elec. Field Antenna Ey 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_Ey HFWR Elec Field Antenna Ey (perp and eastward in Local-Field Aligned/LFA coords) When FFT is applied, Filter Rolls off at 25 kHz mV/m HFWR_Ey (LFA) E12.4 -10.0 10.0 -1.0e+31 PlasmaWaves ACElectricField RadioFrequency 20 25000 Hz HFWR Elec. Field Antenna Ez 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_Ez HFWR Elec Field Antenna Ez (parallel in Local-Field Aligned/LFA coords) When FFT is applied, Filter Rolls off at 25 kHz mV/m HFWR_Ez (LFA) E12.4 -10.0 10.0 -1.0e+31 PlasmaWaves ACElectricField RadioFrequency 20 25000 Hz HFWR Mag. Field Antenna Bx 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_Bx HFWR Mag Field Antenna Bx (perp and outward in Local-Field Aligned/LFA coords) When FFT is applied, Filter Rolls off at 25 kHz nT HFWR_Bx (LFA) E12.4 -10.0 10.0 -1.0e+31 PlasmaWaves ACMagneticField RadioFrequency 20 25000 Hz HFWR Mag. Field Antenna By 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_By HFWR Mag Field Antenna By (perp and eastward in Local-Field Aligned/LFA coords) When FFT is applied, Filter Rolls off at 25 kHz nT HFWR_By (LFA) E12.4 -10.0 10.0 -1.0e+31 PlasmaWaves ACMagneticField RadioFrequency 20 25000 Hz HFWR Mag. Field Antenna 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): HFWR Mag Field Antenna Bz (parallel in Local-Field Aligned/LFA coords). HFWR_Bz HFWR Mag Field Antenna Bz (parallel in Local-Field Aligned/LFA coords) When FFT is applied, Filter Rolls off at 25 kHz nT HFWR_Bz (LFA) E12.4 -10.0 10.0 -1.0e+31 PlasmaWaves ACMagneticField RadioFrequency 20 25000 Hz DATA_QUALITY Ex 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 Ex components (0 = OK, 1 = clipped or questionable). DATA_Q_Ex Data Quality for Ex components (0 = OK, 1 = clipped or questionable) (0=OK,1=Other) Ex DQ I2 0 1 -1 Other DATA_QUALITY Ey 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 Ey components (0 = OK, 1 = clipped or questionable). DATA_Q_Ey Data Quality for Ey components (0 = OK, 1 = clipped or questionable) (0=OK,1=Other) Ey DQ I2 0 1 -1 Other DATA_QUALITY Ez 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 Ez components (0 = OK, 1 = clipped or questionable). DATA_Q_Ez Data Quality for Ez components (0 = OK, 1 = clipped or questionable) (0=OK,1=Other) Ez DQ I2 0 1 -1 Other DATA_QUALITY Bx 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 Bx components (0 = OK, 1 = clipped or questionable). DATA_Q_Bx Data Quality for Bx components (0 = OK, 1 = clipped or questionable) (0=OK,1=Other) Bx DQ I2 0 1 -1 Other DATA_QUALITY By 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 By components (0 = OK, 1 = clipped or questionable). DATA_Q_By Data Quality for By components (0 = OK, 1 = clipped or questionable) (0=OK,1=Other) By DQ I2 0 1 -1 Other DATA_QUALITY 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) Bz DQ I2 0 1 -1 Other HFWR Elec. Field Antenna Ex 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_Ex_Spec Ex Spectrogram from 1024-element FFT When FFT is applied, Filter Rolls off at 25 kHz (V/m)^2/Hz Ex 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 Ey 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_Ey_Spec Ey Spectrogram from 1024-element FFT When FFT is applied, Filter Rolls off at 25 kHz (V/m)^2/Hz Ey 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 Ez 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_Ez_Spec Ez Spectrogram from 1024-element FFT When FFT is applied, Filter Rolls off at 25 kHz (V/m)^2/Hz Ez 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 Bx 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_Bx_Spec Bx Spectrogram from 1024-element FFT When FFT is applied, Filter Rolls off at 25 kHz nT^2/Hz Bx 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 By 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_By_Spec By Spectrogram from 1024-element FFT When FFT is applied, Filter Rolls off at 25 kHz nT^2/Hz By 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