Version:2.2.9

NumericalData

ResourceHeader

ResourceName

Wind Suprathermal Ion Composition Spectrometer (STICS) Distribution Functions

AlternateName

Wind/STICS

ReleaseDate

2019-05-05 12:34:56Z

Description

Wind Suprathermal Ion Composition Spectrometer (STICS) phase-space distribution functions at 1-day time resolution for specified ions. Calibrated science quality data presented in the native spacecraft frame. The data files contain 3D phase space density distribution, A(v) (currently in arbitrary units) functions, for H+. There are 512 values for A(v) for each time step, corresponding to each directional sector (16 total directions) and each Deflection Voltage Step (DVS) corresponding to a set E/q value (32 total voltage steps per sector). Only proton distribution functions are currently released at the production level.

Acknowledgement

Please acknowledge the Wind/STICS instrument team.

Contacts

	Role	Person
1.	DataProducer	spase://SMWG/Person/Jim.Raines
2.	Scientist	spase://SMWG/Person/Susan.T.Lepri
3.	Scientist	spase://SMWG/Person/Thomas.Zurbuchen
4.	CoInvestigator	spase://SMWG/Person/George.Gloeckler

InformationURL

Name

Wind STICS Level 2 Data Release Notes

URL

https://vho.nasa.gov/mission/wind/sms/3d/wind_stics_lv2_release_notes_01Apr2010.pdf

Description

PDF document, revision B, 1 April 2010

InformationURL

Name

WIND/SMS information at the University of Maryland Space Physics Group

URL

https://space.umd.edu/wind/sms.html#STICS

Description

Wind/STICS instrument and other Wind instrument information.

PriorIDs

spase://VHO/NumericalData/Wind/SMS/STICS/Distfunc.P1D

AccessInformation

RepositoryID

spase://SMWG/Repository/NASA/GSFC/VHO-VMO

Availability

Online

AccessRights

Open

AccessURL

URL

https://vho.nasa.gov/mission/wind/sms/3d/daily/

Description

Wind STICS data archive at NASA/GSFC

Format

Text

Encoding

ASCII

ProcessingLevel

Calibrated

ProviderResourceName

Wind/STICS ACE SWICS Level 2 Data, 1-hour averages, in CDF Format

ProviderProcessingLevel

Level 2

ProviderVersion

5

MeasurementType

IonComposition

TemporalDescription

TimeSpan

StartDate

1995-01-01 00:00:00Z

RelativeStopDate

-P6M

Cadence

P1D

ObservedRegion

Heliosphere.Inner

ObservedRegion

Heliosphere.NearEarth

Caveats

The quality of this data is such that it is suitable for serious scientific study. However, to avoid confusion and misunderstanding, it is recommended that users consult STICS Instrument Team before publishing work derived from the data. The STICS Instrument Team has worked hard to minimize errors, but the team cannot accept responsibility for erroneous data, or for misunderstandings about how the data may be used. This is especially true if the appropriate team members are not consulted before publication. At the very least, preprints should be forwarded to the STICS Instrument Team before publication.

Parameter #1

Name

Year

ParameterKey

year

Description

Year in which measurement was made

ValidMin

1995

ValidMax

2025

Support

SupportQuantity

Temporal

Parameter #2

Name

Day of Year

ParameterKey

doy

Description

Integer day of year. Timestamp marks beginning of interval.

Cadence

P1D

ValidMin

1

ValidMax

366

Support

SupportQuantity

Temporal

Parameter #3

Name

Sector

ParameterKey

sector

Description

Sector refers to the observation direction in the ecliptic plane (as shown in Figure 2 of the Release Notes PDF document). Azimuthal sector index of the data, keyed by the Wind Sun sensor. Sectors 8-10 are the solar direction, while Earthward is sectors 0-2. Each sector is 22.5 degrees. See release notes for details.

Cadence

P1D

ValidMin

0

ValidMax

15

Support

SupportQuantity

Other

Parameter #4

Name

DVS

ParameterKey

DVS

Description

Deflection voltage step of the STICS electrostatic analyzer (ESA). This is the step number corresponding to the E/q value given in the row. The set of DVS values are useful for natural binning of E/q values.

Cadence

P1D

ValidMin

0

ValidMax

31

Support

SupportQuantity

Other

Parameter #5

Name

E/q

ParameterKey

e/q

Description

Energy per charge ordinate for phase-space density. These are dictated by the voltage stepping of the STICS electrostatic analyzer (ESA).

Units

keV/e

ValidMin

6.19

ValidMax

223.12

Particle

ParticleType

Proton

ParticleQuantity

Energy

Parameter #6

Name

Velocity

ParameterKey

vel

Description

Velocity ordinate for phase-space density (the center of the velocity bin). These values are different for each ion, proportional to the ion mass per charge (m/q) as 1/sqrt(m/q).

Units

km/s

Particle

ParticleType

Proton

Qualifier

Magnitude

ParticleQuantity

Velocity

Parameter #7

Name

Ion Name

ParameterKey

ion

Description

Ion for which phase-space density is given in particular row.

Support

SupportQuantity

Other

Parameter #8

Name

Phase-Space Density

ParameterKey

df

Description

The phase-space density, in arbitrary units, at the corresponding velocity bin for specified ion and time.

Units

s^3/cm^3*km^3

Particle

ParticleType

Proton

Qualifier

Magnitude

ParticleQuantity

PhaseSpaceDensity