Data Access
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
Version:2.2.9
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
| Role | Person | |
|---|---|---|
| 1. | PrincipalInvestigator | spase://SMWG/Person/Donald.A.Gurnett |
| 2. | Scientist | spase://SMWG/Person/J.Douglas.Menietti |
| 3. | MetadataContact | spase://SMWG/Person/Jeremy.Faden |
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.
HTTP access to directories with Polar PWI H8 data files
In CDF via FTP from SPDF
In CDF via HTTP from SPDF
Plots, lists and files from CDAWeb of the data resource:PO_H8_PWI
Time, begin time of HFWR snapshot
Channel 1 Gain (HFWR)
Channel 2 Gain (HFWR)
Channel 3 Gain (HFWR)
M Gain (HFWR)
HFWR Elec. Ant. Eu
HFWR Elec. Ant. Ev+
HFWR Elec. Ant. Ev-
HFWR Mag. Ant. Bu
HFWR Mag. Ant. Bv
HFWR Mag. Ant. Bz
Data Quality for Eu components: 0 = OK, 1 = clipped or questionable
Data Quality for Ev+ components: 0 = OK, 1 = clipped or questionable
Data Quality for Ev- components: 0 = OK, 1 = clipped or questionable
Data Quality for Bu components: 0 = OK, 1 = clipped or questionable
Data Quality for Bv components: 0 = OK, 1 = clipped or questionable
Data Quality for Bz components: 0 = OK, 1 = clipped or questionable
Eu Spectrogram from 1024-element FFT
Ey Spectrogram from 1024-element FFT
Evm Spectrogram from 1024-element FFT
Bu Spectrogram from 1024-element FFT
Bv Spectrogram from 1024-element FFT
Bz Spectrogram from 1024-element FFT