Version:2.2.3

NumericalData

ResourceHeader

ResourceName

Wind 3DP SST Foil Electron Energy-Angle Distributions

ReleaseDate

2019-08-05 15:03:35Z

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

	Role	Person
1.	PrincipalInvestigator	spase://SMWG/Person/Robert.P.Lin
2.	PrincipalInvestigator	spase://SMWG/Person/Stuart.D.Bale
3.	GeneralContact	spase://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)

AccessInformation

RepositoryID

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

Availability

Online

AccessRights

Open

AccessURL

Name

FTP access to files at SPDF

URL

ftps://spdf.gsfc.nasa.gov/pub/data/wind/3dp/3dp_sfpd/

Description

In CDF via ftp from SPDF

AccessURL

Name

HTTP access to files at 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

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