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ACE SWEPAM Solar Wind Weimer Propagated 60 s Resolution Data in GSE Coordinates

(2006). ACE SWEPAM Solar Wind Weimer Propagated 60 s Resolution Data in GSE Coordinates [Data set]. University of California, Los Angeles. https://doi.org/10.21978/p8ww5q. Accessed on .

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ResourceID
spase://NASA/NumericalData/Weygand/ACE/SWEPAM/Propagated.SWEPAM/GSE/PT60S

Description

ACE Weimer propagated solar wind data and linearly interpolated to have the measurements on the minute at 60 s resolution SWEPAM data in GSE coordinates. This data set consists of propagated solar wind data that has first been propagated to a position just outside of the nominal bow shock (about 17, 0, 0 Re) and then linearly interpolated to 1 min resolution using the interp1.m function in MATLAB. The input data for this data set is a 1 min resolution processed solar wind data constructed by Dr. J.M. Weygand. The method of propagation is similar to the minimum variance technique and is outlined in Dan Weimer et al. [2003; 2004]. The basic method is to find the minimum variance direction of the magnetic field in the plane orthogonal to the mean magnetic field direction. This minimum variance direction is then dotted with the difference between final position vector minus the original position vector and the quantity is divided by the minimum variance dotted with the solar wind velocity vector, which gives the propagation time. This method does not work well for shocks and minimum variance directions with tilts greater than 70 degrees of the sun-earth line. This data set was originally constructed by Dr. J.M. Weygand for Prof. R.L. McPherron, who was the principle investigator of two National Science Foundation studies: GEM Grant ATM 02-1798 and a Space Weather Grant ATM 02-08501. These data were primarily used in superposed epoch studies References: Weimer, D. R. (2004), Correction to Predicting interplanetary magnetic field (IMF) propagation delay times using the minimum variance technique, J. Geophys. Res., 109, A12104, doi:10.1029/2004JA010691. Weimer, D.R., D.M. Ober, N.C. Maynard, M.R. Collier, D.J. McComas, N.F. Ness, C. W. Smith, and J. Watermann (2003), Predicting interplanetary magnetic field (IMF) propagation delay times using the minimum variance technique, J. Geophys. Res., 108, 1026, doi:10.1029/2002JA009405.

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Details

Version:2.3.2

NumericalData

ResourceID
spase://NASA/NumericalData/Weygand/ACE/SWEPAM/Propagated.SWEPAM/GSE/PT60S
ResourceHeader
ResourceName
ACE SWEPAM Solar Wind Weimer Propagated 60 s Resolution Data in GSE Coordinates
AlternateName
ACE SWEPAM data
DOI
https://doi.org/10.21978/p8ww5q
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

ACE Weimer propagated solar wind data and linearly interpolated to have the measurements on the minute at 60 s resolution SWEPAM data in GSE coordinates. This data set consists of propagated solar wind data that has first been propagated to a position just outside of the nominal bow shock (about 17, 0, 0 Re) and then linearly interpolated to 1 min resolution using the interp1.m function in MATLAB. The input data for this data set is a 1 min resolution processed solar wind data constructed by Dr. J.M. Weygand. The method of propagation is similar to the minimum variance technique and is outlined in Dan Weimer et al. [2003; 2004]. The basic method is to find the minimum variance direction of the magnetic field in the plane orthogonal to the mean magnetic field direction. This minimum variance direction is then dotted with the difference between final position vector minus the original position vector and the quantity is divided by the minimum variance dotted with the solar wind velocity vector, which gives the propagation time. This method does not work well for shocks and minimum variance directions with tilts greater than 70 degrees of the sun-earth line. This data set was originally constructed by Dr. J.M. Weygand for Prof. R.L. McPherron, who was the principle investigator of two National Science Foundation studies: GEM Grant ATM 02-1798 and a Space Weather Grant ATM 02-08501. These data were primarily used in superposed epoch studies References: Weimer, D. R. (2004), Correction to Predicting interplanetary magnetic field (IMF) propagation delay times using the minimum variance technique, J. Geophys. Res., 109, A12104, doi:10.1029/2004JA010691. Weimer, D.R., D.M. Ober, N.C. Maynard, M.R. Collier, D.J. McComas, N.F. Ness, C. W. Smith, and J. Watermann (2003), Predicting interplanetary magnetic field (IMF) propagation delay times using the minimum variance technique, J. Geophys. Res., 108, 1026, doi:10.1029/2002JA009405.

Acknowledgement
NASA, David.J.McComas, James M. Weygand
PublicationInfo
Authors
Weygand, James M.; & McPherron, Robert L.
PublicationDate
2006-01-01 00:00:00
PublishedBy
University of California, Los Angeles
Contacts
RolePersonStartDateStopDateNote
1.PrincipalInvestigatorspase://SMWG/Person/David.J.McComas
2.MetadataContactspase://SMWG/Person/James.M.Weygand
InformationURL
Name
ACE SWEPAM Instrument
URL
Description

ACE SWEPAM Data Server

InformationURL
Name
Solar Wind Propagation Information
URL
Description

Solar wind archive at UCLA. This archive provides a list of available data resources and available time ranges.

PriorIDs
spase://VMO/NumericalData/Weygand/ACE/SWEPAM/Propagated.SWEPAM/GSE/PT60S
spase://VSPO/NumericalData/ACE/MAG_SWEPAM/PT1M
spase://VSPO/NumericalData/Weygand/ACE/SWEPAM/Propagated.SWEPAM/GSE/PT60S
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Format
Text
Encoding
ASCII
Acknowledgement
NASA, David.J.McComas, James M. Weygand
ProcessingLevel
Calibrated
ProviderResourceName
ACE SWEPAM
ProviderProcessingLevel
Level-2
InstrumentIDs
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
1998-02-01 00:00:00.000
RelativeStopDate
-P1Y
Note
Time format in data files is: Day Month Year Hour Minute Second (DD MM YYYY HH MM SS.SSS)
Cadence
PT60S
Caveats
Flags=1.000e+34
Keywords
1 min
solar wind
ACE
Advanced Composition Explorer
plasma data
SWEPAM
propagated solar wind data
Parameter #1
Name
Universal Time
ParameterKey
Time
Description

Universal Time AFTER Propagation columns from left to right are: day month year hour minute sec in the format of dd mm yyyy hh mm ss.

Cadence
PT60S
Structure
Size
6
Description

Universal Time expressed using a 6-column day, month, year, hour, minute, second representation

Element
Name
Day
Index
1
ParameterKey
Day
Element
Name
Month
Index
2
ParameterKey
Month
Element
Name
Year
Index
3
ParameterKey
Year
Element
Name
Hour
Index
4
ParameterKey
Hour
Element
Name
Minute
Index
5
ParameterKey
Minute
Element
Name
Second
Index
6
ParameterKey
Second
Support
SupportQuantity
Temporal
Parameter #2
Name
ACE SWEPAM Thermal Speed Weimer Propagated 1 min Resolution Data in GSE Coordiates
ParameterKey
Thermal Speed
Description

Weimer propagated ACE SWEPAM thermal speed in GSE coordinates in units of km/s.

Caveats
Be sure you understand the instrument
Cadence
PT60S
Units
KM/S
Particle
ParticleType
Ion
ParticleQuantity
ThermalSpeed
Parameter #3
Name
ACE SWEPAM Density Weimer Propagated 1 min Resolution Data in GSE Coordiates
ParameterKey
Density
Description

Weimer propagated density data for ACE SWEPAM in GSE coordinates in units of number per cubic centimeter.

Cadence
PT60S
Units
#/cm^-3
Particle
ParticleType
Ion
ParticleQuantity
NumberDensity
Parameter #4
Name
ACE SWEPAM Velocity Vector Weimer Propagated 1 min Resolution Data in GSE Coordiates
ParameterKey
Velocity Vectors
Description

Weimer propagated Flow vector for ACE SWEPAM in GSE coordinates in units of km/s.

Caveats
Be sure you understand the instrument
Cadence
PT60S
Units
KM/S
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Structure
Size
3
Element
Name
VX-GSE
Qualifier
Component.I
Index
1
ParameterKey
pvxgse
Element
Name
VY-GSE
Qualifier
Component.J
Index
2
ParameterKey
pvygse
Element
Name
VZ-GSE
Qualifier
Component.K
Index
3
ParameterKey
pvzgse
Particle
ParticleType
Ion
ParticleQuantity
Velocity
Parameter #5
Name
ACE Spacecraft Weimer Propagated Position Vector Interpolated to 1 min Resolution
ParameterKey
Position Vectors
Description

Weimer propagated location of the spacecraft in GSE coordinates in units of Re.

Cadence
PT60S
Units
Re
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Structure
Size
3
Element
Name
X-GSE
Qualifier
Component.I
Index
1
ParameterKey
nxgse
Element
Name
Y-GSE
Qualifier
Component.J
Index
2
ParameterKey
nygse
Element
Name
Z-GSE
Qualifier
Component.K
Index
3
ParameterKey
nzgse
Support
SupportQuantity
Positional