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THEMIS-B: Solid State Telescope (SST): Energy flux spectrogram, electron/ion ground-calculated fluxes (30 keV - 300 keV).

ResourceID
spase://NASA/NumericalData/THEMIS/B/SST/PT3S

Description

THEMIS-B: The Solid State Telescope (SST) measures the incoming intensity (flux per solid angle) of superthermal electrons and ions. The spacecraft is fitted with two units (heads), each SST unit has two pairs of opposing ion and electron sensors. Each single sensor covers an angle of 36 degrees. The units are oriented such that one pair is always centered in the rotation plane, the other oriented at a maximum angle of 54 degrees off the plane. Each pair of units are oriented opposite each other allowing both ion and electron sensors to sweep out a maximum of 92% of the sky (45x45 degree required Elevation by Azimuth FOV, 108x22 raw) . The ion and electron sensors primarily measure particles between 30-300 keV and 30-100 keV respectively with a maximum capability of 20-6000 keV and 25-1000 keV. Full distribution data is measured over 128 angles and 16 energy bins, reduced distribution uses 6 angles and 16 energy bins, and burst mode data has 64 angles in 16 energy bins. Matched and paired electron broom magnets produce quadrapole fields reducing magnetic contamination. A mechanical attenuator is used to increase the instruments dynamical range avoiding oversaturation near the plasma sheet edge.

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Details

Version:2.2.9

NumericalData

ResourceID
spase://NASA/NumericalData/THEMIS/B/SST/PT3S
ResourceHeader
ResourceName
THEMIS-B: Solid State Telescope (SST): Energy flux spectrogram, electron/ion ground-calculated fluxes (30 keV - 300 keV).
AlternateName
THEMIS-B SST
ReleaseDate
2020-07-07 21:15:25Z
Description

THEMIS-B: The Solid State Telescope (SST) measures the incoming intensity (flux per solid angle) of superthermal electrons and ions. The spacecraft is fitted with two units (heads), each SST unit has two pairs of opposing ion and electron sensors. Each single sensor covers an angle of 36 degrees. The units are oriented such that one pair is always centered in the rotation plane, the other oriented at a maximum angle of 54 degrees off the plane. Each pair of units are oriented opposite each other allowing both ion and electron sensors to sweep out a maximum of 92% of the sky (45x45 degree required Elevation by Azimuth FOV, 108x22 raw) . The ion and electron sensors primarily measure particles between 30-300 keV and 30-100 keV respectively with a maximum capability of 20-6000 keV and 25-1000 keV. Full distribution data is measured over 128 angles and 16 energy bins, reduced distribution uses 6 angles and 16 energy bins, and burst mode data has 64 angles in 16 energy bins. Matched and paired electron broom magnets produce quadrapole fields reducing magnetic contamination. A mechanical attenuator is used to increase the instruments dynamical range avoiding oversaturation near the plasma sheet edge.

Acknowledgement
NASA Contract NAS5-02099
Contacts
RolePerson
1.PrincipalInvestigatorspase://SMWG/Person/Vassilis.Angelopoulos
2.CoInvestigatorspase://SMWG/Person/Davin.Larson
3.CoInvestigatorspase://SMWG/Person/Robert.P.Lin
InformationURL
Name
THEMIS website
URL
PriorIDs
spase://VMO/NumericalData/THEMIS/B/SST/PT3S
spase://VSPO/NumericalData/THEMIS/B/SST/PT3S
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
Description

NASA/GSFC CDAWeb ftp access to the data.

AccessURL
Name
HTTPS from SPDF
URL
Description

In CDF via HTTP from SPDF

AccessURL
Name
CDAWeb
URL
ProductKey
THB_L2_SST
Description

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

Format
CDF
Encoding
None
ProcessingLevel
Calibrated
ProviderProcessingLevel
Level 2
ProviderVersion
xxxx
InstrumentIDs
MeasurementType
IonComposition
MeasurementType
EnergeticParticles
MeasurementType
Spectrum
TemporalDescription
TimeSpan
StartDate
2007-03-14 01:00:00
RelativeStopDate
-P7D
Cadence
PT3S
Caveats
Calibration for the SST is not complete. Currently there are no corrections for the dead layer. Other data products will be added later as calibration continues. Total list of expected data types can be found on the THEMIS website.
Parameter #1
Name
SST Ion energy spectrogram
ParameterKey
thb_psif_en_eflux
Description

SST Ion energy spectrogram in DSL (Despun Spacecraft) coordinates. Spectrogram data is averaged over solid angle.

Caveats
DSL coordinates: The Z-axis points towards the spacecraft spin axis and the Y-axis is obtained from the cross product of Z and the Spacecraft-Sun direction as viewed from the probe; X completes a right handed system.
Units
eV/(cm^2*s*sr*eV)
UnitsConversion
1e4>1/(m^2*s*sr)
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
SR2
Structure
Size
16
Element
Name
thb_psif_en_eflux_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_7
Index
7
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_8
Index
8
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_9
Index
9
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_10
Index
10
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_11
Index
11
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_12
Index
12
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_13
Index
13
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_14
Index
14
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_15
Index
15
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_16
Index
16
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Particle
ParticleType
Ion
Qualifier
Differential
Qualifier
Anisotropy
ParticleQuantity
NumberFlux
Parameter #2
Name
SST Ion energy spectrogram Y-axis (energy).
ParameterKey
thb_psif_en_eflux_yaxis
Description

Ion energy spectrogram: Number intensity is graphed against energy on the Y-axis; ranges from 30-300 keV.

Units
eV
UnitsConversion
1.60217653e-19>J
Structure
Size
16
Element
Name
thb_psif_en_eflux_yaxis_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_yaxis_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_yaxis_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_yaxis_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_yaxis_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_yaxis_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_yaxis_7
Index
7
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_yaxis_8
Index
8
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_yaxis_9
Index
9
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_yaxis_10
Index
10
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_yaxis_11
Index
11
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_yaxis_12
Index
12
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_yaxis_13
Index
13
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_yaxis_14
Index
14
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_yaxis_15
Index
15
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psif_en_eflux_yaxis_16
Index
16
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Particle
ParticleType
Ion
Qualifier
Scalar
ParticleQuantity
Energy
Parameter #3
Name
thb_psif_en_eflux_time
ParameterKey
thb_psif_en_eflux_time
Description

thb_psif_en_eflux_time, UTC, in seconds since 01-Jan-1970 00:00:00; marks center time of data sample

Caveats
Unleaped seconds. Sample start and end time can be calculated from thb_peif_delta_time (sample duration).
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #4
Name
thb_psif_en_eflux_delta_time
ParameterKey
thb_psif_en_eflux_delta_time
Description

Duration in seconds of sample.

Units
sec
ValidMin
0.0
ValidMax
0.0
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #5
Name
thb_psif_en_eflux_mode
ParameterKey
thb_psif_en_eflux_mode
Description

SST survey mode

ValidMin
0
ValidMax
0
FillValue
-128
Support
SupportQuantity
Other
Parameter #6
Name
SST Electron energy spectrogram
ParameterKey
thb_psef_en_eflux
Description

SST Electron energy spectrogram in DSL (Despun Spacecraft) coordinates. Spectrogram data is averaged over solid angle.

Caveats
DSL coordinates: The Z-axis points towards the spacecraft spin axis and the Y-axis is obtained from the cross product of Z and the Spacecraft-Sun direction as viewed from the probe; X completes a right handed system.
Units
eV/(cm^2-s-sr-eV)
UnitsConversion
1e4>1/(m^2*s*sr)
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
SR2
Structure
Size
16
Element
Name
thb_psef_en_eflux_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_7
Index
7
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_8
Index
8
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_9
Index
9
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_10
Index
10
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_11
Index
11
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_12
Index
12
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_13
Index
13
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_14
Index
14
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_15
Index
15
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_16
Index
16
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Particle
ParticleType
Electron
Qualifier
Differential
Qualifier
Anisotropy
ParticleQuantity
NumberFlux
Parameter #7
Name
SST Electron energy spectrogram Y-axis (Energy).
ParameterKey
thb_psef_en_eflux_yaxis
Description

Electron energy spectrogram: Number intensity is graphed against energy on the Y-axis; ranges from 30-300 keV.

Units
eV
UnitsConversion
1.60217653e-19>J
Structure
Size
16
Element
Name
thb_psef_en_eflux_yaxis_1
Index
1
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_yaxis_2
Index
2
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_yaxis_3
Index
3
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_yaxis_4
Index
4
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_yaxis_5
Index
5
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_yaxis_6
Index
6
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_yaxis_7
Index
7
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_yaxis_8
Index
8
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_yaxis_9
Index
9
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_yaxis_10
Index
10
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_yaxis_11
Index
11
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_yaxis_12
Index
12
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_yaxis_13
Index
13
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_yaxis_14
Index
14
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_yaxis_15
Index
15
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Element
Name
thb_psef_en_eflux_yaxis_16
Index
16
ValidMin
0.0
ValidMax
1.0E10
FillValue
NaN
Particle
ParticleType
Ion
Qualifier
Scalar
ParticleQuantity
Energy
Parameter #8
Name
thb_psef_en_eflux_time
ParameterKey
thb_psef_en_eflux_time
Description

thb_psef_en_eflux_time, UTC, in seconds since 01-Jan-1970 00:00:00; marks center time of data sample

Caveats
Unleaped seconds. Sample start and end time can be calculated from thb_peif_delta_time (sample duration).
Units
sec
ValidMin
0.0
ValidMax
5.0E9
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #9
Name
thb_psif_en_flux_delta_time
ParameterKey
thb_psef_en_eflux_delta_time
Description

Sample duration in seconds.

Units
sec
ValidMin
0.0
ValidMax
0.0
FillValue
NaN
Support
SupportQuantity
Temporal
Parameter #10
Name
thb_psef_en_eflux_mode
ParameterKey
thb_psef_en_eflux_mode
Description

SST survey mode

ValidMin
0
ValidMax
0
FillValue
-128
Support
SupportQuantity
Other