An official website of the United States government
Here's how you know v
Official websites use .gov
A .gov websites belongs to an official government organization in the United States
Secure .gov website use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Data Access
FTPS from SPDF (not with most browsers)
HTTPS from SPDF
CDAWeb
WebService:
CDAWeb Programmatic Data Access
HAPI: CDAWeb HAPI Server
Ulysses Solar Wind Observations Over the Poles of the Sun (SWOOPS) Alpha Particle Distribution Function Hot Plasma Moments, Level H1, 4 min Data
var authors='McComas, David J.; Goldstein, Bruce E.; Neugebauer, Marcia M.; Tenerani, Anna';
document.write(authors);
(2025).
Ulysses Solar Wind Observations Over the Poles of the Sun (SWOOPS) Alpha Particle Distribution Function Hot Plasma Moments, Level H1, 4 min Data.
[Data set].
Planetary Data System; Space Physics Data Facility; European Space Astronomy Centre.
https://doi.org/10.48322/1xad-2j98. Accessed on document.write(currentDateStr);.
Note: Proper references, including
Copy BibTeX Citation
or other formats, should include the "Accessed on date" to identify the version of the resource being cited in a given publication.
ResourceID
spase://NASA/NumericalData/Ulysses/SWOOPS/AlphaParticle/Moments/PT4M
Description
This File contains the Moments obtained from the Distribution Function of Alpha Particles after Deconvolution using the same Magnetic Field Values used to construct the Matrices. The Vector Magnetic Field and the Particle Velocity are given in Inertial RTN Coordinates. The Magnetic Field was obtained for the Time at which the Peak of the Alpha Particle Distribution Function was measured. The Particle Velocity was obtained after rotating the Fluid Velocity from Spacecraft to RTN Coordinates and taking into account the Spacecraft Velocity. During Periods of Spacecraft Nutation only the Bulk Speed and Density are reliable, individual Velocity Components and Temperatures are invalid. The Beginning of scientifically useful SWOOPS Data is at Day 322, 00:59 of 1990; at that Time the Spacecraft was already nutating; Nutation ceased as of Day 351, 22:00, 1990. There are small systematic Uncertainties in the Velocity Components. These are due to such Effects as Uncertainty in the Accuracy of Alignment on the Spacecraft, relatively wide Angular Bins, Variation in Gains between Channeltrons, etc. The Velocity Component Data should not be used for Studies of large scale, long term, Solar Wind Deflection. The Data are generally suitable for all other Studies.
Metadata Rights
CC0-1.0:
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions. The actual data/software may be subject to a different license.
View XML |
Edit
Details
Version:2.7.1
NumericalData
ResourceID
spase://NASA/NumericalData/Ulysses/SWOOPS/AlphaParticle/Moments/PT4M
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Ulysses Solar Wind Observations Over the Poles of the Sun (SWOOPS) Alpha Particle Distribution Function Hot Plasma Moments, Level H1, 4 min Data
DOI
https://doi.org/10.48322/1xad-2j98
ReleaseDate
2026-06-26 13:30:42Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 15:38:11Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-10-22 12:34:56.789Z
Note
Revised ObservedRegion. JMW
RevisionEvent
ReleaseDate
2025-11-14 16:02:58Z
Note
Added PublicationInfo. Added ResourceType and NamingAuthority. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to updated value in Version tag. ZCB
RevisionEvent
ReleaseDate
2025-12-04 13:32:22Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-02-15 21:20:22Z
Note
Added DOI. TLK
RevisionEvent
ReleaseDate
2026-06-26 13:30:42Z
Note
Add 'Z' to RevisionEvent:ReleaseDate(s), TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
Description
This File contains the Moments obtained from the Distribution Function of Alpha Particles after Deconvolution using the same Magnetic Field Values used to construct the Matrices. The Vector Magnetic Field and the Particle Velocity are given in Inertial RTN Coordinates. The Magnetic Field was obtained for the Time at which the Peak of the Alpha Particle Distribution Function was measured. The Particle Velocity was obtained after rotating the Fluid Velocity from Spacecraft to RTN Coordinates and taking into account the Spacecraft Velocity. During Periods of Spacecraft Nutation only the Bulk Speed and Density are reliable, individual Velocity Components and Temperatures are invalid. The Beginning of scientifically useful SWOOPS Data is at Day 322, 00:59 of 1990; at that Time the Spacecraft was already nutating; Nutation ceased as of Day 351, 22:00, 1990. There are small systematic Uncertainties in the Velocity Components. These are due to such Effects as Uncertainty in the Accuracy of Alignment on the Spacecraft, relatively wide Angular Bins, Variation in Gains between Channeltrons, etc. The Velocity Component Data should not be used for Studies of large scale, long term, Solar Wind Deflection. The Data are generally suitable for all other Studies.
Acknowledgement
D.J. McComas, B.E. Goldstein, M.M. Neugebauer, A. Tenerani
PublicationInfo
Authors
McComas, David J.; Goldstein, Bruce E.; Neugebauer, Marcia M.; Tenerani, Anna
PublicationDate
2025-11-14 16:02:58Z
PublishedBy
Planetary Data System; Space Physics Data Facility; European Space Astronomy Centre
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/David.J.McComas
2.
PrincipalInvestigator
spase://SMWG/Person/Bruce.E.Goldstein
3.
PrincipalInvestigator
spase://SMWG/Person/Marcia.M.Neugebauer
4.
PrincipalInvestigator
spase://SMWG/Person/Anna.Tenerani
5.
MetadataContact
spase://SMWG/Person/Robert.E.McGuire
6.
MetadataContact
spase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
The Ulysses Solar Wind Observations Over the Poles of the Sun, SWOOPS, Instrument Web Page hosted at the Los Alamos National Laboratory, LANL
URL
https://swoops.lanl.gov/
Description
The Ulysses SWOOPS Web Page, LANL
PriorIDs
spase://VSPO/NumericalData/Ulysses/SWOOPS/AlphaParticle/Moments/PT4M
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
RightsList
Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/ulysses/plasma/swoops_cdaweb/alpha-moments_swoops/
Description
Access to Data in CDF Format via ftp from SPDF
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/ulysses/plasma/swoops_cdaweb/alpha-moments_swoops/
Description
Access to Data in CDF Format via http from SPDF
AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/index.html/
ProductKey
UY_ALPHA-MOMENTS_SWOOPS
Description
Access to ASCII, CDF, and Plots via NASA/GSFC CDAWeb
Format
CDF
Encoding
None
AccessDirectoryTemplate
https://cdaweb.gsfc.nasa.gov/pub/data/ulysses/plasma/swoops_cdaweb/alpha-moments_swoops/$Y
AccessFilenameTemplate
uy_alpha-moments_swoops_$Y$m$d_$v.cdf
Acknowledgement
D.J. McComas, B.E. Goldstein, M.M. Neugebauer, A. Tenerani. Please acknowledge the Data Providers and CDAWeb when using these Data.
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb Programmatic Data Access
URL
https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/UY_ALPHA-MOMENTS_SWOOPS/clientLibraryExample/
Style
WebService
ProductKey
UY_ALPHA-MOMENTS_SWOOPS
Description
Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS.
Format
Binary
Acknowledgement
D.J. McComas, B.E. Goldstein, M.M. Neugebauer, A. Tenerani. Please acknowledge the Data Providers and CDAWeb when using these Data.
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
RightsList
Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products
AccessURL
Name
CDAWeb HAPI Server
URL
https://cdaweb.gsfc.nasa.gov/hapi
Style
HAPI
ProductKey
UY_ALPHA-MOMENTS_SWOOPS
Description
Web Service to this product using the HAPI interface.
Format
CSV
Acknowledgement
D.J. McComas, B.E. Goldstein, M.M. Neugebauer, A. Tenerani. Please acknowledge the Data Providers and CDAWeb when using these Data.
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/Ulysses/Ephemeris
spase://SMWG/Instrument/Ulysses/FGM
spase://SMWG/Instrument/Ulysses/SWOOPS
MeasurementType
MagneticField
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
1990-11-18 12:56:11.000Z
StopDate
2009-06-30 15:38:12.000Z
Cadence
PT4M
ObservedRegion
Heliosphere
ObservedRegion
Sun.Corona
ObservedRegion
Jupiter
ObservedRegion
Heliosphere.NearEarth
ObservedRegion
Heliosphere.Inner
ObservedRegion
Heliosphere.Outer
Parameter #1
Name
Epoch Time
ParameterKey
Epoch
Description
Epoch Time
Caveats
This Parameter exhibits an increasing Monotonic Progression.
Cadence
PT4M
Units
ms
UnitsConversion
1.0e-3>s
RenderingHints
AxisLabel
Epoch
ValueFormat
E14.8
ValidMin
18-Nov-1990 00:00:00.000
ValidMax
01-Jul-2009 00:00:00.000
FillValue
-1.0e+31
Support
SupportQuantity
Temporal
Parameter #2
Name
Heliographic Latitude, HG
Set
Time Series defined by using: EPOCH
ParameterKey
heliographicLatitude
Description
Heliographic Latitude in Heliographic, HG, Coordinates
Cadence
PT4M
Units
°
UnitsConversion
0.0174532925>rad
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
HG
RenderingHints
DisplayType
TimeSeries
AxisLabel
HG_Lat
ValueFormat
F7.1
ScaleType
LinearScale
ValidMin
-90.0
ValidMax
90.0
FillValue
-1.0e+31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #3
Name
Heliocentric Distance
Set
Time Series defined by using: EPOCH
ParameterKey
heliocentricDistance
Description
Heliocentric Distance
Cadence
PT4M
Units
ua
UnitsConversion
1.495978706961e11>m
RenderingHints
DisplayType
TimeSeries
AxisLabel
Ulysses_Dist
ValueFormat
F8.2
ScaleType
LinearScale
ValidMin
0.0
ValidMax
99999.0
FillValue
-1.0e+31
Support
Qualifier
Magnitude
SupportQuantity
Positional
Parameter #4
Name
Magnetic Field BR Component, RTN
Set
Time Series defined by using: EPOCH
ParameterKey
BR
Description
Magnetic Field BR Component in Inertial Radial, Tangential, Normal, RTN, Coordinates
Cadence
PT4M
Units
nT
UnitsConversion
1.0e-9>T
RenderingHints
DisplayType
TimeSeries
AxisLabel
BR_(RTN)
ValueFormat
F10.4
ScaleType
LinearScale
ValidMin
-9999.0
ValidMax
9999.0
FillValue
-1.0e+31
Field
Qualifier
Component.I
FieldQuantity
Magnetic
Parameter #5
Name
Magnetic Field BT Component, RTN
Set
Time Series defined by using: EPOCH
ParameterKey
BT
Description
Magnetic Field BT Component in Inertial Radial, Tangential, Normal, RTN, Coordinates
Cadence
PT4M
Units
nT
UnitsConversion
1.0e-9>T
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
HGI
RenderingHints
DisplayType
TimeSeries
AxisLabel
BT_(RTN)
ValueFormat
F10.4
ScaleType
LinearScale
ValidMin
-9999.0
ValidMax
9999.0
FillValue
-1.0e+31
Field
Qualifier
Component.J
FieldQuantity
Magnetic
Parameter #6
Name
Magnetic Field BN Component, RTN
Set
Time Series defined by using: EPOCH
ParameterKey
BN
Description
Magnetic Field BN Component in Inertial Radial, Tangential, Normal, RTN, Coordinates
Cadence
PT4M
Units
nT
UnitsConversion
1.0e-9>T
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
HGI
RenderingHints
DisplayType
TimeSeries
AxisLabel
BN_(RTN)
ValueFormat
F10.4
ScaleType
LinearScale
ValidMin
-9999.0
ValidMax
9999.0
FillValue
-1.0e+31
Field
Qualifier
Component.K
FieldQuantity
Magnetic
Parameter #7
Name
Magnetic Field Magnitude
Set
Time Series defined by using: EPOCH
ParameterKey
B_MAG
Description
Magnetic Field Magnitude
Cadence
PT4M
Units
nT
UnitsConversion
1.0e-9>T
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
HGI
RenderingHints
DisplayType
TimeSeries
AxisLabel
B_MAG
ValueFormat
F10.4
ScaleType
LinearScale
ValidMin
0.0
ValidMax
9999.0
FillValue
-1.0e+31
Field
Qualifier
Magnitude
FieldQuantity
Magnetic
Parameter #8
Name
He+ Flow Speed
Set
Time Series defined by using: EPOCH
ParameterKey
V_MAG
Description
Alpha Particle, He+, Velocity, Magnitude
Cadence
PT4M
Units
km/s
UnitsConversion
1.0e3>m/s
RenderingHints
DisplayType
TimeSeries
AxisLabel
V_MAG (RTN)
ValueFormat
F8.1
ScaleType
LinearScale
ValidMin
0.0
ValidMax
999999.0
FillValue
-1.0e+31
Particle
ParticleType
AlphaParticle
Qualifier
Magnitude
ParticleQuantity
FlowSpeed
AtomicNumber
2
Parameter #9
Name
He+ Velocity, R Component, HG Coordinates
Set
Time Series defined by using: EPOCH
ParameterKey
VR
Description
Alpha Particle, He+, Velocity Vector, R Component, Heliographic, HG, RTN Coordinates
Cadence
PT4M
Units
km/s
UnitsConversion
1.0e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
HG
RenderingHints
DisplayType
TimeSeries
AxisLabel
VR_(RTN)
ValueFormat
F8.1
ScaleType
LinearScale
ValidMin
-99999.0
ValidMax
99999.0
FillValue
-1.0e+31
Particle
ParticleType
AlphaParticle
Qualifier
Component.I
ParticleQuantity
Velocity
AtomicNumber
2
Parameter #10
Name
He+ Velocity, T Component, HG Coordinates
Set
Time Series defined by using: EPOCH
ParameterKey
VT
Description
Alpha Particle, He+, Velocity Vector, T Component, Heliographic, HG, RTN Coordinates
Cadence
PT4M
Units
km/s
UnitsConversion
1.0e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
HG
RenderingHints
DisplayType
TimeSeries
AxisLabel
VT_(RTN)
ValueFormat
F8.1
ScaleType
LinearScale
ValidMin
-99999.0
ValidMax
99999.0
FillValue
-1.0e+31
Particle
ParticleType
AlphaParticle
Qualifier
Component.J
ParticleQuantity
Velocity
AtomicNumber
2
Parameter #11
Name
He+ Velocity, N Component, HG Coordinates
Set
Time Series defined by using: EPOCH
ParameterKey
VN
Description
Alpha Particle, He+, Velocity Vector, N Component, Heliographic, HG, RTN Coordinates
Cadence
PT4M
Units
km/s
UnitsConversion
1.0e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
HG
RenderingHints
DisplayType
TimeSeries
AxisLabel
VN_(RTN)
ValueFormat
F8.1
ScaleType
LinearScale
ValidMin
-99999.0
ValidMax
99999.0
FillValue
-1.0e+31
Particle
ParticleType
AlphaParticle
Qualifier
Component.K
ParticleQuantity
Velocity
AtomicNumber
2
Parameter #12
Name
He+ Parallel Temperature
Set
Time Series defined by using: EPOCH
ParameterKey
Tpar
Description
Alpha Particle, He+, Temperature parallel to the Magnetic Field, T_par
Cadence
PT4M
Units
°K
RenderingHints
DisplayType
TimeSeries
AxisLabel
T_par
ValueFormat
F9.0
ScaleType
LinearScale
ValidMin
0.0
ValidMax
1.0e+07
FillValue
-1.0e+31
Particle
ParticleType
AlphaParticle
Qualifier
Component
Qualifier
FieldAligned
Qualifier
Parallel
ParticleQuantity
Temperature
AtomicNumber
2
Parameter #13
Name
He+ Perpendicular Temperature
Set
Time Series defined by using: EPOCH
ParameterKey
Tper
Description
Alpha Particle, He+, Temperature perpendicular to the Magnetic Field, T_per
Cadence
PT4M
Units
°K
RenderingHints
DisplayType
TimeSeries
AxisLabel
T_per
ValueFormat
F9.0
ScaleType
LinearScale
ValidMin
0.0
ValidMax
1.0e+07
FillValue
-1.0e+31
Particle
ParticleType
AlphaParticle
Qualifier
Component
Qualifier
Perpendicular
ParticleQuantity
Temperature
AtomicNumber
2
Parameter #14
Name
He+ Number Density
Set
Time Series defined by using: EPOCH
ParameterKey
dens
Description
Alpha Particle, He+, Number Density
Cadence
PT4M
Units
cm^-3
UnitsConversion
1.0e6>m^-3
RenderingHints
DisplayType
TimeSeries
AxisLabel
Dens
ValueFormat
F11.5
ScaleType
LinearScale
ValidMin
0.0
ValidMax
99999.0
FillValue
-1.0e+31
Particle
ParticleType
AlphaParticle
Qualifier
Scalar
ParticleQuantity
NumberDensity
AtomicNumber
2