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Wind Suprathermal Ion Composition Spectrometer (STICS) Distribution Functions

(2021). Wind Suprathermal Ion Composition Spectrometer (STICS) Distribution Functions [Data set]. NASA Space Physics Data Facility. https://doi.org/10.48322/naj7-dg41. Accessed on .

Note: Proper references, including those in BibTex or other formats, should include the "Accessed on date" as shown above to identify the version of the resource being cited in a given publication.

ResourceID
spase://NASA/NumericalData/Wind/SMS/STICS/Distfunc/P1D

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.

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Details

Version:2.3.2

NumericalData

ResourceID
spase://NASA/NumericalData/Wind/SMS/STICS/Distfunc/P1D
ResourceHeader
ResourceName
Wind Suprathermal Ion Composition Spectrometer (STICS) Distribution Functions
AlternateName
Wind/STICS
DOI
https://doi.org/10.48322/naj7-dg41
ReleaseDate
2021-05-31 12:34:56.789
RevisionHistory
RevisionEvent
ReleaseDate
2021-05-31 12:34:56.789
Note
Updated to SPASE Version 2.3.2 if needed, Applied quality control for DOI usage, LFB
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.
PublicationInfo
Authors
Gloeckler, George M.; Raines, Jim M.; Lepri, S. T.; & Zurbuchen, Thomas H.
PublicationDate
2021-01-01 00:00:00
PublishedBy
NASA Space Physics Data Facility
Contacts
RolePersonStartDateStopDateNote
1.DataProducerspase://SMWG/Person/Jim.Raines
2.Scientistspase://SMWG/Person/Susan.T.Lepri
3.Scientistspase://SMWG/Person/Thomas.Zurbuchen
4.CoInvestigatorspase://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
spase://VSPO/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
InstrumentIDs
spase://SMWG/Instrument/Wind/SMS/STICS
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