STEREO-B In-Situ Measurements of Particles and CME Transients (IMPACT) Solar Wind Electron Analyzer (SWEA) 3-Dimensional Electron Distributions, Level 1 (L1), 30 s Data

ResourceID

spase://VSPO/NumericalData/STEREO-B/IMPACT/SWEA/L1/PT30S

Description

The file contains Level 1 3D electron distributions 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:2.3.1

NumericalData

ResourceID

spase://VSPO/NumericalData/STEREO-B/IMPACT/SWEA/L1/PT30S

ResourceHeader

ResourceName: STEREO-B In-Situ Measurements of Particles and CME Transients (IMPACT) Solar Wind Electron Analyzer (SWEA) 3-Dimensional Electron Distributions, Level 1 (L1), 30 s Data

ReleaseDate: 2020-05-19 12:34:56.789Z

Description

Acknowledgement: Please acknowledge the Principal Investigator J.G. Luhmann for use of the Data

Contacts

	Role	Person
1.	PrincipalInvestigator	spase://SMWG/Person/Janet.G.Luhmann
2.	DataProducer	spase://SMWG/Person/Peter.Schroeder
3.	MetadataContact	spase://SMWG/Person/Robert.M.Candey
4.	MetadataContact	spase://SMWG/Person/Lee.Frost.Bargatze

InformationURL

Name: STEREO IMPACT Instrument web site, UCB

URL: http://sprg.ssl.berkeley.edu/impact/

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: https://cdaweb.gsfc.nasa.gov/stereo_swea_caveats.html

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: https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=2006-047B-03

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_30sec_3D_Distributions

spase://VSPO/NumericalData/STEREO-B/IMPACT/SWEA/PT30S

AccessInformation

RepositoryID: spase://SMWG/Repository/NASA/GSFC/SPDF

Availability: Online

AccessRights: Open

AccessURL

Name: FTPS access to CDF Files at SPDF

URL: ftps://spdf.gsfc.nasa.gov/pub/data/stereo/behind/l1/impact/swea_dist/

Description

Access to Data in CDF Format via ftp from SPDF

AccessURL

Name: HTTPS access to CDF Files at SPDF

URL: https://spdf.gsfc.nasa.gov/pub/data/stereo/behind/l1/impact/swea_dist/

Description

Access to Data in CDF Format via http from SPDF

AccessURL

Name: CDAWeb

URL: https://cdaweb.sci.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=STB_L1_SWEA_DIST&index=sp_phys

ProductKey: STB_L1_SWEA_DIST

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: spase://SMWG/Repository/STEREO/IMPACT

Availability: Online

AccessRights: Open

AccessURL

Name: Download of STEREO-B IMPACT/SWEA Level 1 data

URL: http://stereo.ssl.berkeley.edu/L1_data.php

Description

A web site hosting the STEREO IMPACT Level 1 data

Format: CDF

ProcessingLevel: Calibrated

InstrumentIDs

spase://SMWG/Instrument/STEREO-B/IMPACT/SWEA

MeasurementType: ElectricField

MeasurementType: EnergeticParticles

MeasurementType: InstrumentStatus

TemporalDescription

TimeSpan

StartDate: 2006-10-28 20:05:49.000

StopDate: 2014-09-27 16:30:41.000

Cadence: PT30S

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: PT30S

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: PT30S

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: PT30S

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: PT30S

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 @ 1720 eV","Dist @ 1060 eV","Dist @ 651 eV","Dist @ 401 eV","Dist @ 247 eV","Dist @ 152 eV","Dist @ 93.5 eV","Dist @ 57.5 eV","Dist @ 35.4 eV","Dist @ 21.8 eV","Dist @ 13.4 eV","Dist @ 8.27 eV","Dist @ 5.09 eV","Dist @ 3.13 eV","Dist @ 1.93 eV","Dist @ 1.19 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: PT30S

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: PT30S

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: PT30S

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