SPASE version 2.0.0
Numerical Data Product: THEMIS-A: Solid State Telescope (SST): Energy flux spectrogram, electron/ion ground-calculated fluxes (30 keV - 300 keV).
- Resource ID
- spase://VMO/NumericalData/THEMIS/A/SST/PT3S
- Name
- THEMIS-A: Solid State Telescope (SST): Energy flux spectrogram, electron/ion ground-calculated fluxes (30 keV - 300 keV).
- Alternate name
- THEMIS-A SST
- Description
-
THEMIS-A: 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
- Contact
-
Role Person 1. Principal investigator Dr. Vassilis Angelopoulos 2. CoInvestigator Mr. Davin Larson 3. CoInvestigator Prof. Robert P. Lin - Release date
- 2009-05-20 23:06:02
- Repository
-
- Name
- CDAWeb Data Repository FTP Interface
- Availability
- Online
- Access rights
- Open
- URL
-
- CDAWeb FTP Access
-
NASA/GSFC CDAWeb ftp access to the data.
- ASCII, CDF, and plots from CDAWeb
-
Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb
- Format
- CDF
- Encoding
- None
- Processing level
- Calibrated
- Provider processing level
- Level 2
- Provider version
- xxxx
- Instrument
- THEMIS-A: Solid State Telescope (SST): Energy flux spectrogram, electron/ion ground-calculated fluxes (30 keV - 300 keV).
- Measurement type
- Energetic particles
- Ion composition
- Spectrum
- Temporal description
-
- Start date
- 2007-03-14 01:00:00
- Relative stop date
- 7 days ago
- Cadence
- 3 seconds
- 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.
Parameters
Parameter #1
- Name
- SST Ion energy spectrogram
- Parameter key
- tha_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)
- Conversion to SI units
- 1e4>1/(m^2*s*sr)
- Coordinate system
- Cartesian SR2
- Structure
-
- Size
- 16
- Elements
-
Index Name Valid min Valid max Fill value 1 tha_psif_en_eflux_1 0.0 1.0E10 NaN 2 tha_psif_en_eflux_2 0.0 1.0E10 NaN 3 tha_psif_en_eflux_3 0.0 1.0E10 NaN 4 tha_psif_en_eflux_4 0.0 1.0E10 NaN 5 tha_psif_en_eflux_5 0.0 1.0E10 NaN 6 tha_psif_en_eflux_6 0.0 1.0E10 NaN 7 tha_psif_en_eflux_7 0.0 1.0E10 NaN 8 tha_psif_en_eflux_8 0.0 1.0E10 NaN 9 tha_psif_en_eflux_9 0.0 1.0E10 NaN 10 tha_psif_en_eflux_10 0.0 1.0E10 NaN 11 tha_psif_en_eflux_11 0.0 1.0E10 NaN 12 tha_psif_en_eflux_12 0.0 1.0E10 NaN 13 tha_psif_en_eflux_13 0.0 1.0E10 NaN 14 tha_psif_en_eflux_14 0.0 1.0E10 NaN 15 tha_psif_en_eflux_15 0.0 1.0E10 NaN 16 tha_psif_en_eflux_16 0.0 1.0E10 NaN
- Particle type
- Ion
- Quantity
- Number flux
- Qualifier
- Differential
- Anisotropy
Parameter #2
- Name
- SST Ion energy spectrogram Y-axis (energy).
- Parameter key
- tha_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
- Conversion to SI units
- 1.60217653e-19>J
- Structure
-
- Size
- 16
- Elements
-
Index Name Valid min Valid max Fill value 1 tha_psif_en_eflux_yaxis_1 0.0 1.0E10 NaN 2 tha_psif_en_eflux_yaxis_2 0.0 1.0E10 NaN 3 tha_psif_en_eflux_yaxis_3 0.0 1.0E10 NaN 4 tha_psif_en_eflux_yaxis_4 0.0 1.0E10 NaN 5 tha_psif_en_eflux_yaxis_5 0.0 1.0E10 NaN 6 tha_psif_en_eflux_yaxis_6 0.0 1.0E10 NaN 7 tha_psif_en_eflux_yaxis_7 0.0 1.0E10 NaN 8 tha_psif_en_eflux_yaxis_8 0.0 1.0E10 NaN 9 tha_psif_en_eflux_yaxis_9 0.0 1.0E10 NaN 10 tha_psif_en_eflux_yaxis_10 0.0 1.0E10 NaN 11 tha_psif_en_eflux_yaxis_11 0.0 1.0E10 NaN 12 tha_psif_en_eflux_yaxis_12 0.0 1.0E10 NaN 13 tha_psif_en_eflux_yaxis_13 0.0 1.0E10 NaN 14 tha_psif_en_eflux_yaxis_14 0.0 1.0E10 NaN 15 tha_psif_en_eflux_yaxis_15 0.0 1.0E10 NaN 16 tha_psif_en_eflux_yaxis_16 0.0 1.0E10 NaN
- Particle type
- Ion
- Quantity
- Energy
- Qualifier
- Scalar
Parameter #3
- Name
- tha_psif_en_eflux_time
- Parameter key
- tha_psif_en_eflux_time
- Description
-
tha_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 tha_peif_delta_time (sample duration).
- Units
- sec
- Valid minimum
- 0.0
- Valid maximum
- 5.0E9
- Fill value
- NaN
- Parameter type
- Temporal
Parameter #4
- Name
- tha_psif_en_eflux_delta_time
- Parameter key
- tha_psif_en_eflux_delta_time
- Description
-
Duration in seconds of sample.
- Units
- sec
- Valid minimum
- 0.0
- Valid maximum
- 0.0
- Fill value
- NaN
- Parameter type
- Temporal
Parameter #5
- Name
- tha_psif_en_eflux_mode
- Parameter key
- tha_psif_en_eflux_mode
- Description
-
SST survey mode
- Valid minimum
- 0
- Valid maximum
- 0
- Fill value
- -128
- Parameter type
- Other
Parameter #6
- Name
- SST Electron energy spectrogram
- Parameter key
- tha_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)
- Conversion to SI units
- 1e4>1/(m^2*s*sr)
- Coordinate system
- Cartesian SR2
- Structure
-
- Size
- 16
- Elements
-
Index Name Valid min Valid max Fill value 1 tha_psef_en_eflux_1 0.0 1.0E10 NaN 2 tha_psef_en_eflux_2 0.0 1.0E10 NaN 3 tha_psef_en_eflux_3 0.0 1.0E10 NaN 4 tha_psef_en_eflux_4 0.0 1.0E10 NaN 5 tha_psef_en_eflux_5 0.0 1.0E10 NaN 6 tha_psef_en_eflux_6 0.0 1.0E10 NaN 7 tha_psef_en_eflux_7 0.0 1.0E10 NaN 8 tha_psef_en_eflux_8 0.0 1.0E10 NaN 9 tha_psef_en_eflux_9 0.0 1.0E10 NaN 10 tha_psef_en_eflux_10 0.0 1.0E10 NaN 11 tha_psef_en_eflux_11 0.0 1.0E10 NaN 12 tha_psef_en_eflux_12 0.0 1.0E10 NaN 13 tha_psef_en_eflux_13 0.0 1.0E10 NaN 14 tha_psef_en_eflux_14 0.0 1.0E10 NaN 15 tha_psef_en_eflux_15 0.0 1.0E10 NaN 16 tha_psef_en_eflux_16 0.0 1.0E10 NaN
- Particle type
- Electron
- Quantity
- Number flux
- Qualifier
- Differential
- Anisotropy
Parameter #7
- Name
- SST Electron energy spectrogram Y-axis (Energy).
- Parameter key
- tha_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
- Conversion to SI units
- 1.60217653e-19>J
- Structure
-
- Size
- 16
- Elements
-
Index Name Valid min Valid max Fill value 1 tha_psef_en_eflux_yaxis_1 0.0 1.0E10 NaN 2 tha_psef_en_eflux_yaxis_2 0.0 1.0E10 NaN 3 tha_psef_en_eflux_yaxis_3 0.0 1.0E10 NaN 4 tha_psef_en_eflux_yaxis_4 0.0 1.0E10 NaN 5 tha_psef_en_eflux_yaxis_5 0.0 1.0E10 NaN 6 tha_psef_en_eflux_yaxis_6 0.0 1.0E10 NaN 7 tha_psef_en_eflux_yaxis_7 0.0 1.0E10 NaN 8 tha_psef_en_eflux_yaxis_8 0.0 1.0E10 NaN 9 tha_psef_en_eflux_yaxis_9 0.0 1.0E10 NaN 10 tha_psef_en_eflux_yaxis_10 0.0 1.0E10 NaN 11 tha_psef_en_eflux_yaxis_11 0.0 1.0E10 NaN 12 tha_psef_en_eflux_yaxis_12 0.0 1.0E10 NaN 13 tha_psef_en_eflux_yaxis_13 0.0 1.0E10 NaN 14 tha_psef_en_eflux_yaxis_14 0.0 1.0E10 NaN 15 tha_psef_en_eflux_yaxis_15 0.0 1.0E10 NaN 16 tha_psef_en_eflux_yaxis_16 0.0 1.0E10 NaN
- Particle type
- Ion
- Quantity
- Energy
- Qualifier
- Scalar
Parameter #8
- Name
- tha_psef_en_eflux_time
- Parameter key
- tha_psef_en_eflux_time
- Description
-
tha_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 tha_peif_delta_time (sample duration).
- Units
- sec
- Valid minimum
- 0.0
- Valid maximum
- 5.0E9
- Fill value
- NaN
- Parameter type
- Temporal
Parameter #9
- Name
- tha_psif_en_flux_delta_time
- Parameter key
- tha_psef_en_eflux_delta_time
- Description
-
Sample duration in seconds.
- Units
- sec
- Valid minimum
- 0.0
- Valid maximum
- 0.0
- Fill value
- NaN
- Parameter type
- Temporal
Parameter #10
- Name
- tha_psef_en_eflux_mode
- Parameter key
- tha_psef_en_eflux_mode
- Description
-
SST survey mode
- Valid minimum
- 0
- Valid maximum
- 0
- Fill value
- -128
- Parameter type
- Other