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STEREO-B In-Situ Measurements of Particles and CME Transients (IMPACT) Solar Wind Electron Analyzer (SWEA) 3-Dimensional Electron Distributions, Burst Mode, Level 1 (L1), 2 s Data

ResourceID
spase://NASA/NumericalData/STEREO-B/IMPACT/SWEA/L1/PT2S

Description

The file contains Level 1 3D electron distributions in burst mode from the In-situ Measurements of Particles and CME Transients, IMPACT, SWEA instrument on the STEREO Behind spacecraft. For important usage caveats see https://cdaweb.gsfc.nasa.gov/stereo_swea_caveats.html.

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Details

Version:2.3.2

NumericalData

ResourceID
spase://NASA/NumericalData/STEREO-B/IMPACT/SWEA/L1/PT2S
ResourceHeader
ResourceName
STEREO-B In-Situ Measurements of Particles and CME Transients (IMPACT) Solar Wind Electron Analyzer (SWEA) 3-Dimensional Electron Distributions, Burst Mode, Level 1 (L1), 2 s Data
ReleaseDate
2021-04-27 15:38:11Z
Description

The file contains Level 1 3D electron distributions in burst mode from the In-situ Measurements of Particles and CME Transients, IMPACT, SWEA instrument on the STEREO Behind spacecraft. For important usage caveats see https://cdaweb.gsfc.nasa.gov/stereo_swea_caveats.html.

Acknowledgement
Please acknowledge the Principal Investigator J.G. Luhmann for use of the Data
Contacts
RolePerson
1.PrincipalInvestigatorspase://SMWG/Person/Janet.G.Luhmann
2.DataProducerspase://SMWG/Person/Peter.Schroeder
3.MetadataContactspase://SMWG/Person/Robert.M.Candey
4.MetadataContactspase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
STEREO IMPACT Instrument web site, UCB
URL
Description

STEREO In-Situ Measurements of Particles and CME Transients, IMPACT, instrument experiment and data description web site, hosted by University of California, Berkeley

Language
en
InformationURL
Name
STEREO IMPACT SWEA Data Caveats web page, GSFC
URL
Description

STEREO In-Situ Measurements of Particles and CME Transients, IMPACT, Solar Wind Electron Analyzer, SWEA, Data Caveats web page, hosted by NASA GSFC

Language
en
InformationURL
Name
NSSDC Master Catalog, STEREO B, IMPACT instrument
URL
Description

General information concerning the STEREO B, In-Situ Measurements of Particles and CME Transients, IMPACT, instrument

Language
en
PriorIDs
spase://VSPO/NumericalData/P_STEREO-B_HDR_IMPACT_SWEA_2sec_3DBurstMode_Distributions
spase://VSPO/NumericalData/STEREO-B/IMPACT/SWEA/PT2S
spase://VSPO/NumericalData/STEREO-B/IMPACT/SWEA/L1/PT2S
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
Description

Access to Data in CDF Format via ftp from SPDF

AccessURL
Name
HTTPS from SPDF
URL
Description

Access to Data in CDF Format via http from SPDF

AccessURL
Name
CDAWeb
URL
ProductKey
STB_L1_SWEA_DISB
Description

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

Format
CDF
Encoding
None
Acknowledgement
Please acknowledge the Principal Investigator J.G. Luhmann. Please acknowledge the Data Providers and CDAWeb when using these Data.
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb HAPI Server
URL
Style
HAPI
ProductKey
STB_L1_SWEA_DISB
Description

Web Service to this product using the HAPI interface.

Format
CSV
Acknowledgement
Please acknowledge the Principal Investigator J.G. Luhmann. Please acknowledge the Data Providers and CDAWeb when using these Data.
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
Download of STEREO-B IMPACT/SWEA Level 1 data
URL
Description

A web site hosting the STEREO IMPACT Level 1 data

Format
CDF
ProcessingLevel
Calibrated
InstrumentIDs
MeasurementType
ElectricField
MeasurementType
EnergeticParticles
MeasurementType
InstrumentStatus
TemporalDescription
TimeSpan
StartDate
2006-10-28 20:05:11.000
StopDate
2014-02-26 22:51:47.000
Cadence
PT2S
ObservedRegion
Heliosphere.Remote1AU
Caveats
Since commissioning, the SWEA instruments on both STEREO spacecraft have registered difficult to characterize degradations in the solar wind core electron energies, probably due to charging effects. The nature of the degradations are such that the data are not reliable for electron measurements below 45 eV. However, halo and higher energy electrons are unaffected. Versions 4 and higher of the SWEA 3D distribution data products have these lower energies removed. Similarly, Versions 4 and higher of the SWEA pitch angle distribution products also remove these energies. Use of the SWEA pitch angle distributions for most purposes, for example, higher energy heat flux pitch angle distribbutions, PADs, should be largely unaffected. For more information regarding these issues, please contact Peter Schroeder, peters@ssl.berkeley.edu. If you have downloaded Version 3 or earlier Files, those files contain unreliable data below 45 eV and should be replaced with Version 4 files. Note that if the interpretation of these data become a significant focus in your work, you should obtain explicit prior permission from the PI of the experiment before publication.
Parameter #1
Name
Epoch Time
ParameterKey
Epoch
Description

Epoch Time Tag, time since 0 AD, interval centered

Cadence
PT2S
Units
ms
UnitsConversion
1.0e-3>s
RenderingHints
AxisLabel
Epoch
ValidMin
01-Jan-1990 00:00:00.000
ValidMax
31-Dec-2020 00:00:00.000
FillValue
31-Dec-9999 23:59:59.999
Support
SupportQuantity
Temporal
Parameter #2
Name
Electron Count Distribution, Time Interval
Set
Time series defined by using: EPOCH
ParameterKey
SWEADistInterval
Description

Electron Three-Dimensional Count Distribution, data collection time Interval

Cadence
PT2S
Units
s
RenderingHints
AxisLabel
Dist Time Interval
ValueFormat
E13.6
ValidMin
0.0
ValidMax
100000.0
FillValue
-1.0e+31
Support
SupportQuantity
Temporal
Parameter #3
Name
SWEA Instrument Mode ID
Set
Time series defined by using: EPOCH
ParameterKey
SWEAModeID
Description

Solar Wind Electron Analyzer, SWEA, Instrument Mode ID

Cadence
PT2S
RenderingHints
AxisLabel
SWEA Mode
ValueFormat
I2
ValidMin
-127
ValidMax
127
FillValue
-128
Support
Qualifier
Scalar
SupportQuantity
InstrumentMode
Parameter #4
Name
Electron Count Distribution, Angle Bins
ParameterKey
Angle_Bins
Description

Electron Count Distribution, 80 Angle Bins

Cadence
PT2S
RenderingHints
AxisLabel
Angle Bin
ValueFormat
I3
Structure
Size
80
ValidMin
0
ValidMax
80
FillValue
4294967295
Support
Qualifier
Array
SupportQuantity
Other
Parameter #5
Name
Electron 3D Energy-Angle Count Distribution
Set
Time series defined by using: EPOCH
ParameterKey
Distribution
Description

Electron Three-Dimensional Count Distribution, Energy versus Angle display, do not use energies below 45 eV.

  • Column 1 Labels from ENERGY: ["Dist @ 1790 eV","Dist @ 1260 eV","Dist @ 883 eV","Dist @ 621 eV","Dist @ 437 eV","Dist @ 307 eV","Dist @ 216 eV","Dist @ 152 eV","Dist @ 107 eV","Dist @ 75.0 eV","Dist @ 52.7 eV","Dist @ 37.1 eV","Dist @ 26.0 eV","Dist @ 18.3 eV","Dist @ 12.9 eV","Dist @ 9.05 eV"].
  • Column 2 Labels from ANGLE_BINS: ["Dist @ Angle 1","Dist @ Angle 2","Dist @ Angle 3","Dist @ Angle 4","Dist @ Angle 5","Dist @ Angle 6","Dist @ Angle 7","Dist @ Angle 8","Dist @ Angle 9","Dist @ Angle 10","Dist @ Angle 11","Dist @ Angle 12","Dist @ Angle 13","Dist @ Angle 14","Dist @ Angle 15","Dist @ Angle 16","Dist @ Angle 17","Dist @ Angle 18","Dist @ Angle 19","Dist @ Angle 20","Dist @ Angle 21","Dist @ Angle 22","Dist @ Angle 23","Dist @ Angle 24","Dist @ Angle 25","Dist @ Angle 26","Dist @ Angle 27","Dist @ Angle 28","Dist @ Angle 29","Dist @ Angle 30","Dist @ Angle 31","Dist @ Angle 32","Dist @ Angle 33","Dist @ Angle 34","Dist @ Angle 35","Dist @ Angle 36","Dist @ Angle 37","Dist @ Angle 38","Dist @ Angle 39","Dist @ Angle 40","Dist @ Angle 41","Dist @ Angle 42","Dist @ Angle 43","Dist @ Angle 44","Dist @ Angle 45","Dist @ Angle 46","Dist @ Angle 47","Dist @ Angle 48","Dist @ Angle 49","Dist @ Angle 50","Dist @ Angle 51","Dist @ Angle 52","Dist @ Angle 53","Dist @ Angle 54","Dist @ Angle 55","Dist @ Angle 56","Dist @ Angle 57","Dist @ Angle 58","Dist @ Angle 59","Dist @ Angle 60","Dist @ Angle 61","Dist @ Angle 62","Dist @ Angle 63","Dist @ Angle 64","Dist @ Angle 65","Dist @ Angle 66","Dist @ Angle 67","Dist @ Angle 68","Dist @ Angle 69","Dist @ Angle 70","Dist @ Angle 71","Dist @ Angle 72","Dist @ Angle 73","Dist @ Angle 74","Dist @ Angle 75","Dist @ Angle 76","Dist @ Angle 77","Dist @ Angle 78","Dist @ Angle 79","Dist @ Angle 80"].
Cadence
PT2S
RenderingHints
DisplayType
Spectrogram
ValueFormat
E13.6
Structure
Size
16 80
FillValue
-1.0e+31
Particle
ParticleType
Electron
Qualifier
Differential
Qualifier
Array
ParticleQuantity
NumberFlux
Parameter #6
Name
SWEA Bias Voltage
Set
Time series defined by using: EPOCH
ParameterKey
V0
Description

Solar Wind Electron Analyzer, SWEA, Instrument Bias Voltage, V₀. The bias voltage sweep pattern was altered to reduce low energy electron contributions from unanticipated spacecraft-related secondaries. The voltage bias were originally swept from 1 eV to 2000 eV but the lower limit sweep voltage was later updated to 8 eV.

Cadence
PT2S
RenderingHints
AxisLabel
V0
ValueFormat
I3
ScaleType
LinearScale
ValidMin
-127
ValidMax
127
FillValue
-128
Field
Qualifier
Magnitude
Qualifier
Scalar
FieldQuantity
Potential
Parameter #7
Name
Electron Count Distribution, Energy Bins
ParameterKey
Energy
Description

Electron Count Distribution, 16 Energy Bins

Cadence
PT2S
Units
eV
UnitsConversion
1.602176565e-19>J
RenderingHints
AxisLabel
Energy
ValueFormat
E12.2
ScaleType
LinearScale
Structure
Size
16
ValidMin
1.0
ValidMax
2000.0
FillValue
-1.0e+31
Particle
Qualifier
Differential
Qualifier
Array
ParticleQuantity
Energy