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THEMIS-D: Probe Electric Field Instrument and Search Coil Magnetometer Instrument, Digital Fields Board - digitally computed Filter Bank spectra and E12 peak and average in HF band (FBK).

(2023). THEMIS-D: Probe Electric Field Instrument and Search Coil Magnetometer Instrument, Digital Fields Board - digitally computed Filter Bank spectra and E12 peak and average in HF band (FBK). [Data set]. NASA Space Physics Data Facility. https://doi.org/10.48322/dj1x-mv94 (CiteAs link). Accessed on .

ResourceID
spase://NASA/NumericalData/THEMIS/D/FBK/PT4S

Description

The Filter Bank is part of the Digital fields board and provides band-pass filtering for EFI and SCM spectra as well as E12HF peak and average value calculations. The Filter Bank provides band-pass filtering for less computationally and power intensive spectra than the FFT would provide. The process is as follows: Signals are fed to the Filter Bank via a low-pass FIR filter with a cut-off frequency half that of the original signal maximum. The output is passed to the band-pass filters, is differenced from the original signal, then absolute value of the data is taken and averaged. The output from the low-pass filter is also sent to a second FIR filter with 2:1 decimation. This output is then fed back through the system. The process runs through 12 cascades for input at 8,192 samples/s and 13 for input at 16,384 samples/sec (EAC input only), reducing the signal and computing power by a factor 2 at each cascade. At each cascade a set of data is produced at a sampling frequency of 2^n from 2 Hz to the initial sampling frequency (frequency characteristics for each step are shown below in Table 1). The average from the Filter Bank is compressed to 8 bits with a pseudo-logarithmic encoder. The data is stored in sets of six frequency bins at 2.689 kHz, 572 Hz, 144.2 Hz, 36.2 Hz, 9.05 Hz, and 2.26 Hz. The average of the coupled E12HF signal and it's peak value are recorded over 62.5 ms windows (i.e. a 16 Hz sampling rate). Accumulation of values from signal 31.25 ms windows is performed externally. The analog signals fed into the FBK are E12DC and SCM1. Sensor and electronics design provided by UCB (J. W. Bonnell, F. S. Mozer), Digital Fields Board provided by LASP (R. Ergun), Search coil data provided by CETP (A. Roux). Table 1: Frequency Properties. Cascade Frequency content of Input Signal Low-pass Filter Cutoff Frequency Freuency Content of Low-pass Output Signal Filter Bank Frequency Band 0* 0 - 8 kHz 4 kHz 0 - 4 kHz 4 - 8 kHz 1 0 - 4 kHz 2 kHz 0 - 2 kHz 2 - 4 kHz 2 0 - 2 kHz 1 kHz 0 - 1 kHz 1 - 2 kHz 3 0 - 1 kHz 512 Hz 0 - 512 Hz 512 Hz - 1 kHz 4 0 - 512 Hz 256 Hz 0 - 256 Hz 256 - 512 Hz 5 0 - 256 Hz 128 Hz 0 - 128 Hz 128 - 256 Hz 6 0 - 128 Hz 64 Hz 0 - 64 Hz 64 - 128 Hz 7 0 - 64 Hz 32 Hz 0 - 32 Hz 32 - 64 Hz 8 0 - 32 Hz 16 Hz 0 - 16 Hz 16 - 32 Hz 9 0 - 16 Hz 8 Hz 0 - 8 Hz 8 - 16 Hz 10 0 - 8 Hz 4 Hz 0 - 4 Hz 4 - 8 Hz 11 0 - 4 Hz 2 Hz 0 - 2 Hz 2 - 4 Hz 12 0 - 2 Hz 1 Hz 0 - 1 Hz 1 - 2 Hz *Only available for 16,384 Hz sampling.

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Details

Version:2.6.0

NumericalData

ResourceID
spase://NASA/NumericalData/THEMIS/D/FBK/PT4S
ResourceHeader
ResourceName
THEMIS-D: Probe Electric Field Instrument and Search Coil Magnetometer Instrument, Digital Fields Board - digitally computed Filter Bank spectra and E12 peak and average in HF band (FBK).
DOI
https://doi.org/10.48322/dj1x-mv94
ReleaseDate
2023-07-30 12:34:56.789
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 15:38:11
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2023-07-30 12:34:56.789
Note
Added DOI and PublicationInfo minted by LFB, metadata versioned up to SPASE 2.6.0, reviewed by LFB 20230727
Description

The Filter Bank is part of the Digital fields board and provides band-pass filtering for EFI and SCM spectra as well as E12HF peak and average value calculations. The Filter Bank provides band-pass filtering for less computationally and power intensive spectra than the FFT would provide. The process is as follows: Signals are fed to the Filter Bank via a low-pass FIR filter with a cut-off frequency half that of the original signal maximum. The output is passed to the band-pass filters, is differenced from the original signal, then absolute value of the data is taken and averaged. The output from the low-pass filter is also sent to a second FIR filter with 2:1 decimation. This output is then fed back through the system. The process runs through 12 cascades for input at 8,192 samples/s and 13 for input at 16,384 samples/sec (EAC input only), reducing the signal and computing power by a factor 2 at each cascade. At each cascade a set of data is produced at a sampling frequency of 2^n from 2 Hz to the initial sampling frequency (frequency characteristics for each step are shown below in Table 1). The average from the Filter Bank is compressed to 8 bits with a pseudo-logarithmic encoder. The data is stored in sets of six frequency bins at 2.689 kHz, 572 Hz, 144.2 Hz, 36.2 Hz, 9.05 Hz, and 2.26 Hz. The average of the coupled E12HF signal and it's peak value are recorded over 62.5 ms windows (i.e. a 16 Hz sampling rate). Accumulation of values from signal 31.25 ms windows is performed externally. The analog signals fed into the FBK are E12DC and SCM1. Sensor and electronics design provided by UCB (J. W. Bonnell, F. S. Mozer), Digital Fields Board provided by LASP (R. Ergun), Search coil data provided by CETP (A. Roux). Table 1: Frequency Properties. Cascade Frequency content of Input Signal Low-pass Filter Cutoff Frequency Freuency Content of Low-pass Output Signal Filter Bank Frequency Band 0* 0 - 8 kHz 4 kHz 0 - 4 kHz 4 - 8 kHz 1 0 - 4 kHz 2 kHz 0 - 2 kHz 2 - 4 kHz 2 0 - 2 kHz 1 kHz 0 - 1 kHz 1 - 2 kHz 3 0 - 1 kHz 512 Hz 0 - 512 Hz 512 Hz - 1 kHz 4 0 - 512 Hz 256 Hz 0 - 256 Hz 256 - 512 Hz 5 0 - 256 Hz 128 Hz 0 - 128 Hz 128 - 256 Hz 6 0 - 128 Hz 64 Hz 0 - 64 Hz 64 - 128 Hz 7 0 - 64 Hz 32 Hz 0 - 32 Hz 32 - 64 Hz 8 0 - 32 Hz 16 Hz 0 - 16 Hz 16 - 32 Hz 9 0 - 16 Hz 8 Hz 0 - 8 Hz 8 - 16 Hz 10 0 - 8 Hz 4 Hz 0 - 4 Hz 4 - 8 Hz 11 0 - 4 Hz 2 Hz 0 - 2 Hz 2 - 4 Hz 12 0 - 2 Hz 1 Hz 0 - 1 Hz 1 - 2 Hz *Only available for 16,384 Hz sampling.

Acknowledgement
NASA Contract NAS5-02099
PublicationInfo
Authors
Angelopoulos, Vassilis; Bonnell, John, W.; Ergun, Robert, E.; Mozer, Forrest, S.; Roux, Alain
PublicationDate
2023-01-01 00:00:00
PublishedBy
NASA Space Physics Data Facility
Contacts
RolePersonStartDateStopDateNote
1.PrincipalInvestigatorspase://SMWG/Person/Vassilis.Angelopoulos
2.CoInvestigatorspase://SMWG/Person/John.W.Bonnell
3.CoInvestigatorspase://SMWG/Person/Robert.E.Ergun
4.CoInvestigatorspase://SMWG/Person/Forrest.S.Mozer
5.CoInvestigatorspase://SMWG/Person/Alain.Roux
6.MetadataContactspase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
THEMIS website
URL
http://themis.ssl.berkeley.edu
PriorIDs
spase://VMO/NumericalData/THEMIS/D/FBK/PT4S
spase://VSPO/NumericalData/THEMIS/D/FBK/PT4S
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/themis/thd/l2/fbk/
Description

NASA/GSFC CDAWeb ftp access to FBK data.

AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/themis/thd/l2/fbk/
Description

In CDF via HTTP from SPDF

AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=THD_L2_FBK&index=sp_phys
ProductKey
THD_L2_FBK
Description

Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb.

Format
CDF
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb HAPI Server
URL
https://cdaweb.gsfc.nasa.gov/hapi
Style
HAPI
ProductKey
THD_L2_FBK@0
ProductKey
THD_L2_FBK@1
ProductKey
THD_L2_FBK@10
ProductKey
THD_L2_FBK@11
ProductKey
THD_L2_FBK@12
ProductKey
THD_L2_FBK@13
ProductKey
THD_L2_FBK@14
ProductKey
THD_L2_FBK@15
ProductKey
THD_L2_FBK@2
ProductKey
THD_L2_FBK@3
ProductKey
THD_L2_FBK@4
ProductKey
THD_L2_FBK@5
ProductKey
THD_L2_FBK@6
ProductKey
THD_L2_FBK@7
ProductKey
THD_L2_FBK@8
ProductKey
THD_L2_FBK@9
Description

Web Service to this product using the HAPI interface.

Format
CSV
ProviderVersion
xxxx
InstrumentIDs
spase://SMWG/Instrument/THEMIS/D/EFI
spase://SMWG/Instrument/THEMIS/D/SCM
MeasurementType
ElectricField
MeasurementType
MagneticField
MeasurementType
Spectrum
TemporalDescription
TimeSpan
StartDate
2007-02-24 00:00:01
RelativeStopDate
-P7D
Cadence
PT4S
Parameter #1
Name
thd_fbh
ParameterKey
thd_fb_hff
Description

Peak and average values from the coupled, high-frequency signal off opposing EFI booms 1 and 2. Booms 1 and 2 are situated in the spin plane of the spacecraft, boom 1 along the positive x-axis (SPG coordinates).

Caveats
hf_peak and hf_avg are the peak and average values of the output of the High-Frequency Filter, a broadband filter convering the 100- to 400-kHz band used for AKR detection
Units
V
Structure
Size
2
Element
Name
FBK-D HF Filter Peak Voltage
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
FBK-D HF Filter Average Voltage
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Field
FieldQuantity
Potential
Parameter #2
Name
thd_fbh_time
ParameterKey
thd_fb_hff_time
Description

thd_fbh_time, UTC, in seconds since 01-Jan-1970 00:00:00

Caveats
Not including leap seconds
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #3
Name
thd_fbh_compno
ParameterKey
thd_fb_hff_compno
Units
num
Structure
Size
2
Element
Name
FBK-D HF Filter Peak Voltage
Index
1
ValidMin
1
ValidMax
2
FillValue
-32768
Element
Name
FBK-D HF Filter Average Voltage
Index
2
ValidMin
1
ValidMax
2
FillValue
-32768
Support
SupportQuantity
Other
Parameter #4
Name
Calibrated Spectra
ParameterKey
thd_fb_v1
Description

Spectrogram FBK potential, EFI sensor 1 in spacecraft spin plane along the positive x-axis(SPG coordinates).

Caveats
Average of absolute values.
Units
V
Structure
Size
6
Element
Name
thd_fb_v1_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v1_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v1_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v1_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v1_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v1_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Field
FieldQuantity
Potential
Parameter #5
Name
thd_fb_v1_time
ParameterKey
thd_fb_v1_time
Description

thd_fb_v1_time, UTC, in seconds since 01-Jan-1970 00:00:00

Caveats
Not including leap seconds
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #6
Name
Calibrated Spectra
ParameterKey
thd_fb_v2
Description

Spectrogram FBK potential, EFI sensor 2 in spacecraft spin plane along the negative x-axis (SPG coordinates).

Caveats
Average of absolute values.
Units
V
Structure
Size
6
Element
Name
thd_fb_v2_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v2_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v2_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v2_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v2_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v2_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Field
FieldQuantity
Potential
Parameter #7
Name
thd_fb_v2_time
ParameterKey
thd_fb_v2_time
Description

thd_fb_v2_time, UTC, in seconds since 01-Jan-1970 00:00:00

Caveats
Not including leap seconds
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #8
Name
Calibrated Spectra
ParameterKey
thd_fb_v3
Description

Spectrogram FBK potential, EFI sensor 3 in spacecraft spin plane along the positive y-axis (SPG coordinates).

Caveats
Average of absolute values.
Units
V
Structure
Size
6
Element
Name
thd_fb_v3_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v3_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v3_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v3_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v3_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v3_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Field
FieldQuantity
Potential
Parameter #9
Name
thd_fb_v3_time
ParameterKey
thd_fb_v3_time
Description

thd_fb_v3_time, UTC, in seconds since 01-Jan-1970 00:00:00

Caveats
Not including leap seconds
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #10
Name
Calibrated Spectra
ParameterKey
thd_fb_v4
Description

Spectrogram FBK potential, EFI sensor 4 in spacecraft spin plane along the negative y-axis (SPG coordinates).

Caveats
Average of absolute values.
Units
V
Structure
Size
6
Element
Name
thd_fb_v4_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v4_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v4_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v4_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v4_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v4_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Field
FieldQuantity
Potential
Parameter #11
Name
thd_fb_v4_time
ParameterKey
thd_fb_v4_time
Description

thd_fb_v4_time, UTC, in seconds since 01-Jan-1970 00:00:00

Caveats
Not including leap seconds
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #12
Name
Calibrated Spectra
ParameterKey
thd_fb_v5
Description

Spectrogram FBK potential, EFI sensor 5 located atop spacecraft along the spin axis (positive z-axis) (SPG coordinates).

Caveats
Average of absolute values.
Units
V
Structure
Size
6
Element
Name
thd_fb_v5_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v5_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v5_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v5_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v5_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v5_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Field
FieldQuantity
Potential
Parameter #13
Name
thd_fb_v5_time
ParameterKey
thd_fb_v5_time
Description

thd_fb_v5_time, UTC, in seconds since 01-Jan-1970 00:00:00

Caveats
Not including leap seconds
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #14
Name
Calibrated Spectra
ParameterKey
thd_fb_v6
Description

Spectrogram FBK potential, EFI sensor 6 located below the spacecraft along the spin axis (negative z-axis) (SPG coordinates).

Caveats
Average of absolute values.
Units
V
Structure
Size
6
Element
Name
thd_fb_v6_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v6_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v6_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v6_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v6_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_v6_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Field
FieldQuantity
Potential
Parameter #15
Name
thd_fb_v6_time
ParameterKey
thd_fb_v6_time
Description

thd_fb_v6_time, UTC, in seconds since 01-Jan-1970 00:00:00

Caveats
Not including leap seconds
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #16
Name
Calibrated Spectra
ParameterKey
thd_fb_edc12
Description

Spectrogram FBK coupled E field DC component, EFI sensors 1 and 2 in the spacecraft spin plane (sensor 1 along positive x-axis, SPG coordinates).

Caveats
Average of absolute values.
Units
mV/m
UnitsConversion
1e-3>V/m
Structure
Size
6
Element
Name
thd_fb_edc12_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_edc12_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_edc12_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_edc12_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_edc12_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_edc12_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Field
FieldQuantity
Electric
Parameter #17
Name
thd_fb_edc12_time
ParameterKey
thd_fb_edc12_time
Description

thd_fb_edc12_time, UTC, in seconds since 01-Jan-1970 00:00:00

Caveats
Not including leap seconds
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #18
Name
Calibrated Spectra
ParameterKey
thd_fb_edc34
Description

Spectrogram FBK coupled E field DC component, EFI sensors 3 and 4 in the spacecraft spin plane (sensor 3 along positive y-axis, SPG coordinates).

Caveats
Average of absolute values.
Units
mV/m
UnitsConversion
1e-3>V/m
Structure
Size
6
Element
Name
thd_fb_edc34_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_edc34_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_edc34_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_edc34_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_edc34_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_edc34_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Field
FieldQuantity
Electric
Parameter #19
Name
thd_fb_edc34_time
ParameterKey
thd_fb_edc34_time
Description

thd_fb_edc34_time, UTC, in seconds since 01-Jan-1970 00:00:00

Caveats
Not including leap seconds
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #20
Name
Calibrated Spectra
ParameterKey
thd_fb_edc56
Description

Spectrogram FBK coupled E field DC component, EFI sensors 5 and 6 (axial, sensor 5 along positve z-axis, SPG coordinates).

Caveats
Average of absolute values.
Units
mV/m
UnitsConversion
1e-3>V/m
Structure
Size
6
Element
Name
thd_fb_edc56_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_edc56_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_edc56_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_edc56_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_edc56_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_edc56_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Field
FieldQuantity
Electric
Parameter #21
Name
thd_fb_edc56_time
ParameterKey
thd_fb_edc56_time
Description

thd_fb_edc56_time, UTC, in seconds since 01-Jan-1970 00:00:00

Caveats
Not including leap seconds
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #22
Name
Calibrated Spectra
ParameterKey
thd_fb_scm1
Description

Spectrogram for FBK Search Coil Magnetometer (SCM) Axis 1.

Caveats
Average of absolute values. SCM axes are specific to the instrument.
Units
nT
UnitsConversion
1e-9>T
Structure
Size
6
Element
Name
thd_fb_scm1_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_scm1_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_scm1_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_scm1_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_scm1_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_scm1_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Field
FieldQuantity
Magnetic
Parameter #23
Name
thd_fb_scm1_time
ParameterKey
thd_fb_scm1_time
Description

thd_fb_scm1_time, UTC, in seconds since 01-Jan-1970 00:00:00

Caveats
Not including leap seconds
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #24
Name
Calibrated Spectra
ParameterKey
thd_fb_scm2
Description

Spectrogram for FBK Search Coil Magnetometer (SCM) Axis 2.

Caveats
Average of absolute values. SCM axes are specific to the instrument.
Units
nT
UnitsConversion
1e-9>T
Structure
Size
6
Element
Name
thd_fb_scm2_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_scm2_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_scm2_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_scm2_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_scm2_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_scm2_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Field
FieldQuantity
Magnetic
Parameter #25
Name
thd_fb_scm2_time
ParameterKey
thd_fb_scm2_time
Description

thd_fb_scm2_time, UTC, in seconds since 01-Jan-1970 00:00:00

Caveats
Not including leap seconds
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #26
Name
Calibrated Spectra
ParameterKey
thd_fb_scm3
Description

Spectrogram for FBK Search Coil Magnetometer (SCM) Axis 3.

Caveats
Average of absolute values. SCM axes are specific to the instrument.
Units
nT
UnitsConversion
1e-9>T
Structure
Size
6
Element
Name
thd_fb_scm3_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_scm3_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_scm3_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_scm3_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_scm3_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_scm3_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Field
FieldQuantity
Magnetic
Parameter #27
Name
thd_fb_scm3_time
ParameterKey
thd_fb_scm3_time
Description

thd_fb_scm3_time, UTC, in seconds since 01-Jan-1970 00:00:00

Caveats
Not including leap seconds
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #28
Name
Calibrated Spectra
ParameterKey
thd_fb_eac12
Description

FBK spectrogram for coupled E field AC component, EFI sensors 1 and 2 (spin plane, sensor 1 along positve x-axis, SPG coordinates).

Caveats
Average of absolute values.
Units
mV/m
UnitsConversion
1e-3>V/m
Structure
Size
6
Element
Name
thd_fb_eac12_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_eac12_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_eac12_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_eac12_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_eac12_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_eac12_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Field
FieldQuantity
Electric
Parameter #29
Name
thd_fb_eac12_time
ParameterKey
thd_fb_eac12_t ime
Description

thd_fb_eac12_time, UTC, in seconds since 01-Jan-1970 00:00:00

Caveats
Not including leap seconds
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #30
Name
Calibrated Spectra
ParameterKey
thd_fb_eac34
Description

FBK spectrogram for coupled E field AC component, EFI sensors 3 and 4 (spin plane, sensor 3 along positive y-axis, SPG coordinates).

Caveats
Average of absolute values.
Units
mV/m
UnitsConversion
1e-3>V/m
Structure
Size
6
Element
Name
thd_fb_eac34_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_eac34_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_eac34_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_eac34_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_eac34_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_eac34_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Field
FieldQuantity
Electric
Parameter #31
Name
thd_fb_eac34_time
ParameterKey
thd_fb_eac34_time
Description

thd_fb_eac34_time, UTC, in seconds since 01-Jan-1970 00:00:00

Caveats
Not including leap seconds
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #32
Name
Calibrated Spectra
ParameterKey
thd_fb_eac56
Description

FBK spectrogram for coupled E field AC component, EFI sensors 5 and 6 (axial, sensor 5 along positive z-axis, SPG coordinates).

Caveats
Average of absolute values.
Units
mV/m
UnitsConversion
1e-3>V/m
Structure
Size
6
Element
Name
thd_fb_eac56_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_eac56_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_eac56_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_eac56_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_eac56_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thd_fb_eac56_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Field
FieldQuantity
Electric
Parameter #33
Name
thd_fb_eac56_time
ParameterKey
thd_fb_eac56_time
Description

thd_fb_eac56_time, UTC, in seconds since 01-Jan-1970 00:00:00

Caveats
Not including leap seconds
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #34
Name
thd_fb_yaxis
ParameterKey
thd_fb_yaxis
Description

thd_fb_yaxis

Units
Hz
Structure
Size
6
Element
Name
thd_fb_yaxis_1
Index
1
ValidMin
0.0
ValidMax
10000.0
FillValue
NaN
Element
Name
thd_fb_yaxis_2
Index
2
ValidMin
0.0
ValidMax
10000.0
FillValue
NaN
Element
Name
thd_fb_yaxis_3
Index
3
ValidMin
0.0
ValidMax
10000.0
FillValue
NaN
Element
Name
thd_fb_yaxis_4
Index
4
ValidMin
0.0
ValidMax
10000.0
FillValue
NaN
Element
Name
thd_fb_yaxis_5
Index
5
ValidMin
0.0
ValidMax
10000.0
FillValue
NaN
Element
Name
thd_fb_yaxis_6
Index
6
ValidMin
0.0
ValidMax
10000.0
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #35
Name
thd_fbk_fstart
ParameterKey
thd_fbk_fstart
Description

thd_fbk_fstart

Units
Hz
Structure
Size
6
Element
Name
thd_fbk_fstart_1
Index
1
ValidMin
0.0
ValidMax
1000000.0
FillValue
NaN
Element
Name
thd_fbk_fstart_2
Index
2
ValidMin
0.0
ValidMax
1000000.0
FillValue
NaN
Element
Name
thd_fbk_fstart_3
Index
3
ValidMin
0.0
ValidMax
1000000.0
FillValue
NaN
Element
Name
thd_fbk_fstart_4
Index
4
ValidMin
0.0
ValidMax
1000000.0
FillValue
NaN
Element
Name
thd_fbk_fstart_5
Index
5
ValidMin
0.0
ValidMax
1000000.0
FillValue
NaN
Element
Name
thd_fbk_fstart_6
Index
6
ValidMin
0.0
ValidMax
1000000.0
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #36
Name
thd_fbk_fband
ParameterKey
thd_fbk_fband
Description

Graph Y-Axis, Frequency

Units
Hz
Structure
Size
6
Element
Name
thd_fbk_fband_1
Index
1
ValidMin
0.0
ValidMax
1000000.0
FillValue
NaN
Element
Name
thd_fbk_fband_2
Index
2
ValidMin
0.0
ValidMax
1000000.0
FillValue
NaN
Element
Name
thd_fbk_fband_3
Index
3
ValidMin
0.0
ValidMax
1000000.0
FillValue
NaN
Element
Name
thd_fbk_fband_4
Index
4
ValidMin
0.0
ValidMax
1000000.0
FillValue
NaN
Element
Name
thd_fbk_fband_5
Index
5
ValidMin
0.0
ValidMax
1000000.0
FillValue
NaN
Element
Name
thd_fbk_fband_6
Index
6
ValidMin
0.0
ValidMax
1000000.0
FillValue
NaN
Support
SupportQuantity
Temporal