Polar Plasma Wave Instrument (PWI), High Frequency Waveform Receiver, 25kHz bandwidth interferometry fields

https://doi.org/10.48322/06zn-yc02

2023-07-30 12:34:56.789

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

spase://VWO/NumericalData/POLAR/PWI/HFWR.25kHz.Interferometry.PT0.000014S

spase://VSPO/NumericalData/POLAR/PWI/HFWR/25kHz/Interferometry/PT0.000014S

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UIowa, Donald A. Gurnett

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UIowa, Donald. A. Gurnett and the Space Physics Data Facility at NASA/GSFC

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PT0.000014S

Time

Epoch

Time, begin time of HFWR snapshot

Gain changes may occur at these times

ms

27-Feb-1996 00:00:00.000

29-Apr-2008 00:00:00.000

-1.0e+31

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)

0

30

-1

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)

0

30

-1

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)

0

30

-1

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)

0

30

-1

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

-10.0

10.0

-1.0e+31

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

-10.0

10.0

-1.0e+31

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

-10.0

10.0

-1.0e+31

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

-10.0

10.0

-1.0e+31

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

-10.0

10.0

-1.0e+31

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

-10.0

10.0

-1.0e+31

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)

0

1

-1

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)

0

1

-1

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)

0

1

-1

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)

0

1

-1

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)

0

1

-1

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)

0

1

-1

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

1E-20

1E-2

-1.0e+31

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

1E-20

1E-2

-1.0e+31

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

1E-20

1E-2

-1.0e+31

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

1E-16

1E+2

-1.0e+31

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

1E-16

1E+2

-1.0e+31

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

1E-16

1E+2

-1.0e+31