2.2.2 spase://VWO/NumericalData/POLAR/PWI/LHFWR.16kHz.PT0.000028S Polar Plasma Wave Instrument, High Frequency Waveform Receiver, 16 kHz bandwidth, 6-channel Fields 2012-11-15T00:00:00Z 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 16000Hz. The cadence value given here is computed from the inverse of the sampling rate (35.71 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 H3 data web access http://www-pw.physics.uiowa.edu/polar/po_h3_pwi/ HTTP access to directories with Polar PWI H3 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_h3 PO_H3_PWI In CDF via FTP from SPDF HTTP access to files at SPDF http://spdf.gsfc.nasa.gov/pub/data/polar/pwi/pwi_h3 In CDF via HTTP from SPDF CDF None UIowa, Donald A. Gurnett spase://SMWG/Repository/NASA/GSFC/SPDF Online Open CDAWeb http://cdaweb.gsfc.nasa.gov/sp_phys/ PO_H3_PWI Plots, lists and files from CDAWeb of the data resource:PO_H3_PWI Text spase://SMWG/Instrument/POLAR/PWI Waves.Passive 1996-03-25T00:00:00.000 1997-09-17T00:00:00.000 The cadence value given here is computed from the inverse of the sampling rate (35.71 kHz). PT0.000028S 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: H3>LHWFR 16kHz (6 channels) 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, time of HFWR 16 kHz value ms Epoch 27-Feb-1996 00:00:00.000 31-Dec-2020 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. Gain 1 Channel 1 Gain (HFWR 16 kHz) HFWR_16K_Ex_Gain I3 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 16 kHz) HFWR_16K_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 16 kHz) HFWR_16K_Ez_Gain I2 0 30 -1 Other Gain for HFWR 16 kHz M-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) Applies to all 3 Magnetic Channels HFWR_16K_MGain I2 0 30 -1 Other HFWR 16 kHz 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_Ex16K HFWR 16 kHz Elec. Ant. Ex, Field Aligned, Perpendicular mV/M HFWR_Ex16K E12.4 -30.0 30.0 -1.0e+31 PlasmaWaves ACElectricField HFWR 16 kHz 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_Ey16K HFWR 16 kHz Elec. Ant. Ey, Field Aligned, Perpendicular mV/M HFWR_Ey16K E12.4 -30.0 30.0 -1.0e+31 PlasmaWaves ACElectricField HFWR 16 kHz 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_Ez16K HFWR 16 kHz Elec. Ant. Ez, Field Aligned, Parallel mV/M HFWR_Ez16K E12.4 -30.0 30.0 -1.0e+31 PlasmaWaves ACElectricField HFWR 16 kHz 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_Bx16K HFWR 16 kHz Mag. Ant. Bx, Field Aligned, Perpendicular nT HFWR_Bx16K E12.4 -50.0 50.0 -1.0e+31 PlasmaWaves ACMagneticField HFWR 16 kHz 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_By16K HFWR 16 kHz Mag. Ant. By, Field Aligned, Perpendicular nT HFWR_By16K E12.4 -50.0 50.0 -1.0e+31 PlasmaWaves ACMagneticField HFWR 16 kHz 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_Bz16K HFWR 16 kHz Mag. Ant. Bz, Field Aligned, Parallel When FFT is applied, Filter Rolls off at 25 kHz nT HFWR_Bz16K E12.4 -50.0 50.0 -1.0e+31 PlasmaWaves ACMagneticField DATA_QUALITY 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_QUALITY DATA_QUALITY 0 = OK, 1 = poor (0=OK,1=Poor) DATA_QUALITY I1 0 1 -1 Other