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Wind 3DP SST Foil Electron Energy-Angle Distributions

ResourceID
spase://NASA/NumericalData/Wind/3DP/SST_Foil/PD/PT24S

Description

Electron energy-angle distributions 27-520 keV, often at 24 sec, SST Foil, Wind 3DP - R. Lin (UC Berkeley)

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Version:2.2.3

NumericalData

ResourceID
spase://NASA/NumericalData/Wind/3DP/SST_Foil/PD/PT24S
ResourceHeader
ResourceName
Wind 3DP SST Foil Electron Energy-Angle Distributions
ReleaseDate
2020-07-07 21:16:04Z
Description

Electron energy-angle distributions 27-520 keV, often at 24 sec, SST Foil, Wind 3DP - R. Lin (UC Berkeley)

Acknowledgement
Principle Investigators Robert Lin and Stuart Bale, the Wind 3DP team, and the Space Physics Data Facility (SPDF)/NASA GSFC
Contacts
RolePerson
1.PrincipalInvestigatorspase://SMWG/Person/Robert.P.Lin
2.PrincipalInvestigatorspase://SMWG/Person/Stuart.D.Bale
3.GeneralContactspase://SMWG/Person/Robert.E.McGuire
InformationURL
Name
Caveats to the use of Wind 3DP data
URL
https://spdf.gsfc.nasa.gov/pub/data/wind/3dp/wind3dp_caveats.pdf
Description

Caveats for the correct use of Wind 3DP datasets

InformationURL
Name
Wind 3DP home page at UCB
URL
http://sprg.ssl.berkeley.edu/wind3dp/
Description

home page at UCB (with plotting and digital data)

PriorIDs
spase://VSPO/NumericalData/Wind/3DP/SST_Foil/PD/PT24S
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/wind/3dp/3dp_sfpd/
Description

In CDF via ftp from SPDF

AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/wind/3dp/3dp_sfpd/
Description

In CDF via HTTP from SPDF

Format
CDF
Acknowledgement
Please acknowledge the CDAWeb team at GSFC/SPDF.
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb
URL
https://cdaweb.sci.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=WI_SFPD_3DP&index=sp_phys
ProductKey
WI_SFPD_3DP
Format
Text
InstrumentIDs
spase://SMWG/Instrument/Wind/3DP
MeasurementType
EnergeticParticles
TemporalDescription
TimeSpan
StartDate
1994-11-15 12:56:18.000Z
RelativeStopDate
-P30D
Cadence
PT24S
ObservedRegion
Heliosphere.NearEarth
Caveats
General Notes per Lynn Wilson Jan 2015: The solid-state telescope (SST) for Wind 3DP electrons returns a velocity distribution function containing 7 energy bins and 48 solid-angle bins. The automated CDF routine appears to remove all the following solid-angle bins: [7,8,9,15,31,32,33] = sun/anti-sun look directions, and [20,21,22,23,44,45,46,47] = low geometry factor bins (also correspond to the SST Thick anti-coincidence detector bins). The sun/anti-sun directions are removed to avoid X-ray and EUV contamination, which is often seen during solar flares. The onset looks exactly like the GOES X-ray observations, which is kind of fun but not what we want to look at. Unfortunately, these look directions can correspond to the magnetic field direction, which can limit the times when we would like to examine SEP events. General Notes per Lynn Wilson Jan 2015: Note that SST Open (e.g., wi_sopd_3dp_00000000_v01.cdf) software removes the following additional solid-angle bins: [0,1,24,25] = noisy. Additionally, SST Open has 9 energy channels from ~70 keV to ~6.7 or 7.1 MeV, depending on the mode the instrument is in. It does not appear that the routine mk_sosp_cdf.pro removes any of these ...bad... look directions, so that should be noted as well. General Notes per Lynn Wilson Jan 2015: Inside the radiation belts, both Foil and Open saturate and suffer from penetrating particles. The instruments are not shielded, so they can only provide relative changes when in these regions. General Notes per Lynn Wilson Jan 2015: The data all look like they are in units of number flux or # cm-2 s-1 sr-1 eV-1.
Parameter #1
Name
Epoch
ParameterKey
Epoch
Description

Number of milliseconds since CDF_EPOCH: 0000-01-01T00:00:00.000.

Units
ms
UnitsConversion
1e-3>s
ValidMin
01-Jan-1956 00:00:00.000
ValidMax
01-Jan-2083 00:00:00.000
FillValue
-1.0E31
Support
SupportQuantity
Temporal
Parameter #2
Name
Unix Time
ParameterKey
TIME
Description

Time since 1970-01-01T00:00:00Z in seconds

Units
s
Support
SupportQuantity
Temporal
Parameter #3
Name
Electron Flux
ParameterKey
FLUX
Description

Electron number flux 30-500 keV in 7 energy and 8 pitch angle bins. The first dimension corresponds to 7 time dependent energy bands (parameter ENERGY,centered from ~30-500 keV). The 2nd dimension corresponds to 8 time dependent pitch angles (parameter PANGLE, ranging from ~15 deg to ~165 deg)

Units
#/(cm^2*ster*eV*s)
Structure
Size
7 8
Particle
ParticleType
Electron
ParticleQuantity
NumberFlux
EnergyRange
Low
30000
High
500000
Units
eV
AzimuthalAngleRange
Low
0
High
360
Units
degrees
PolarAngleRange
Low
0
High
180
Units
degrees
Parameter #4
Name
Electron Pitch Angle
ParameterKey
PANGLE
Description

Time-varying electron pitch angles for 8 angular bins

Units
degree
Structure
Size
8
Description

The 8 average pitch angles for this pitch angle
distribution

Particle
ParticleType
Electron
Qualifier
DirectionAngle
ParticleQuantity
ArrivalDirection
Parameter #5
Name
Electron Energy
ParameterKey
ENERGY_filled
Description

Time-varying electron energies for 7 channels

Caveats
Uses fix-sparse to fill in nan energy values
Units
eV
Structure
Size
7
Description

The 7 average electron energies for this pitch angle
distribution

Particle
ParticleType
Electron
Qualifier
Average
ParticleQuantity
Energy
EnergyRange
Low
30000
High
500000
Units
eV
Parameter #6
Name
Magnetic field vector in GSE coordinates
ParameterKey
MAGF
Description

Magnetic field vector in GSE coordinates

Units
nT
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Structure
Size
3
Element
Name
Bx
Index
1
ValidMin
-10
ValidMax
10
Element
Name
By
Index
2
ValidMin
-10
ValidMax
10
Element
Name
Bz
Index
3
ValidMin
-10
ValidMax
10
Field
Qualifier
Average
Qualifier
Vector
FieldQuantity
Magnetic