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ACE Solar Wind Electron, Proton, and Alpha Monitor (SWEPAM) Plasma Moments, Level 2 (H2), 1 h Data

ResourceID
spase://NASA/NumericalData/ACE/SWEPAM/L2/PT1H

Description

This Data Product contains Measurements from the ACE Solar Wind Electron Proton Alpha Monitor (SWEPAM) Instrument. The Quality of the ACE Level 2 Data are such that it is suitable for serious Scientific Study. However, to avoid Confusion and Misunderstanding, it is recommended that Users consult with the appropriate ACE Team Members before publishing Work derived from the Data. The ACE Team has worked hard to ensure that the Level 2 Data are free from 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 ACE Team Members are not consulted before Publication. At the very least, Preprints should be forwarded to the ACE Team before Publication. SWEPAM References: http://www.srl.caltech.edu/ACE/

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Details

Version:2.3.0

NumericalData

ResourceID
spase://NASA/NumericalData/ACE/SWEPAM/L2/PT1H
ResourceHeader
ResourceName
ACE Solar Wind Electron, Proton, and Alpha Monitor (SWEPAM) Plasma Moments, Level 2 (H2), 1 h Data
ReleaseDate
2020-07-07 21:14:15Z
Description

This Data Product contains Measurements from the ACE Solar Wind Electron Proton Alpha Monitor (SWEPAM) Instrument. The Quality of the ACE Level 2 Data are such that it is suitable for serious Scientific Study. However, to avoid Confusion and Misunderstanding, it is recommended that Users consult with the appropriate ACE Team Members before publishing Work derived from the Data. The ACE Team has worked hard to ensure that the Level 2 Data are free from 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 ACE Team Members are not consulted before Publication. At the very least, Preprints should be forwarded to the ACE Team before Publication. SWEPAM References: http://www.srl.caltech.edu/ACE/

Acknowledgement
D.J. McComas, Please acknowledge the Principal Investigator, D.J. McComas, Southwest Research Institute. See the Rules Of Use available from the ACE Science Center at: http://www.srl.caltech.edu/ace/asc/level2/policy_lvl2.html.
Contacts
RolePerson
1.PrincipalInvestigatorspase://SMWG/Person/David.J.McComas
2.DataProducerspase://SMWG/Person/Ruth.Skoug
3.MetadataContactspase://SMWG/Person/Robert.E.McGuire
4.MetadataContactspase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
ACE Science Center Home Page for Level 2 Data Release Notes
URL
http://www.srl.caltech.edu/ACE/ASC/level2/index.html
Description

ACE Level 2 Data Release Notes Home Page

InformationURL
Name
ACE Science Center Home Page for Level 2 Rules of Use
URL
http://www.srl.caltech.edu/ACE/ASC/level2/policy_lvl2.html
Description

ACE Level 2 Rules of Use Home Page

InformationURL
Name
ACE Solar Wind Electron, Proton, and Alpha Monitor (SWEPAM) Instrument Home Page at the Los Alamos National Laboratory
URL
https://www.swepam.lanl.gov
Description

ACE SWEPAM Instrument Home Page at LANL

PriorIDs
spase://VSPO/NumericalData/ACE/SWEPAM/L2/PT3600S
spase://VSPO/NumericalData/P_ACE_HDR_SWEPAM_1HR
spase://VSPO/NumericalData/ACE/SWEPAM/L2/PT1H
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/ace/swepam/level_2_cdaweb/swe_h2/
Description

Access to Data in CDF Format via ftp from SPDF

AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/ace/swepam/level_2_cdaweb/swe_h2/
Description

Access to Data in CDF Format via http from SPDF

AccessURL
Name
CDAWeb
URL
https://cdaweb.sci.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=AC_H2_SWE&index=sp_phys
ProductKey
AC_H2_SWE
Description

Access to ASCII, CDF, and Plots via NASA/GSFC CDAWeb

Format
CDF
Encoding
None
Acknowledgement
D.J. McComas, Please acknowledge the Principal Investigator, D.J. McComas, Southwest Research Institute. See the Rules Of Use available from the ACE Science Center at: http://www.srl.caltech.edu/ace/asc/level2/policy_lvl2.html. Please acknowledge the Data Providers and CDAWeb when using these Data.
ProviderProcessingLevel
Calculated
InstrumentIDs
spase://SMWG/Instrument/ACE/Ephemeris
spase://SMWG/Instrument/ACE/SWEPAM
MeasurementType
Ephemeris
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
1998-02-04 00:00:00.000
RelativeStopDate
-P3M
Note
The Data become available about three Months after Observation
Cadence
PT1H
ObservedRegion
Heliosphere
ObservedRegion
Heliosphere.Inner
ObservedRegion
Heliosphere.NearEarth
Parameter #1
Name
Epoch Time
ParameterKey
Epoch
Description

Epoch Time, Beginning of Interval

Caveats
Average Type: standard This Parameter exhibits an increasing Monotonic Progression.
Cadence
PT1H
Units
ms
UnitsConversion
1.0e-3>s
RenderingHints
AxisLabel
Epoch
ValueFormat
E14.8
ScaleMin
6.2987652219904e+13
ScaleMax
6.3745034619904e+13
ScaleType
LinearScale
ValidMin
01-Jan-1996 00:00:00.000
ValidMax
01-Jan-2020 00:00:00.000
FillValue
-1.0e+31
Support
SupportQuantity
Temporal
Parameter #2
Name
Time PB5
Set
Time Series defined by using: EPOCH
ParameterKey
Time_PB5
Description

Time PB5, Time of Observation, Year, Day, and Milliseconds of Day

Caveats
This Parameter exhibits an increasing Monotonic Progression.
Cadence
PT1H
RenderingHints
ScaleType
LinearScale
Structure
Size
3
Element
Name
Year
Index
1
Units
a
ValidMin
1997
ValidMax
2020
RenderingHints
AxisLabel
year
ScaleMin
1997
ScaleMax
2020
Element
Name
Day of Year (Jan 1 = Day 1)
Index
2
Units
d
ValidMin
1
ValidMax
366
RenderingHints
AxisLabel
day
ScaleMin
1
ScaleMax
366
Element
Name
Elapsed milliseconds of day
Index
3
Units
ms
ValidMin
0
ValidMax
86400
RenderingHints
AxisLabel
msec
ScaleMin
0
ScaleMax
86400
FillValue
-2147483648
Support
SupportQuantity
Temporal
Parameter #3
Name
Solar Wind Proton Number Density
Set
Time Series defined by using: EPOCH
ParameterKey
Np
Description

Solar Wind Proton Number Density

Caveats
Np is the Solar Wind Proton Number Density in Units of cm^-3, as calculated by Integration of the Ion Distribution Function.
Cadence
PT1H
Units
cm^-3
UnitsConversion
1.0e6>m^-3
RenderingHints
DisplayType
TimeSeries
AxisLabel
H_Density
ValueFormat
F8.4
ScaleMin
0.0
ScaleMax
100.0
ValidMin
0.0
ValidMax
200.0
FillValue
-1.0e+31
Particle
ParticleType
Proton
Qualifier
Magnitude
Qualifier
Moment
ParticleQuantity
NumberDensity
AtomicNumber
1
Parameter #4
Name
Solar Wind Proton Bulk Speed
Set
Time Series defined by using: EPOCH
ParameterKey
Vp
Description

Solar Wind Proton Bulk Speed

Caveats
Vp is the Solar Wind Proton Speed, or more generally just the Solar Wind Bulk Speed. It is obtained by Integration of the Ion (Proton) Distribution Function.
Cadence
PT1H
Units
km/s
UnitsConversion
1.0e3>m/s
RenderingHints
DisplayType
TimeSeries
AxisLabel
SW_H_Speed
ValueFormat
F8.2
ScaleMin
0.0
ScaleMax
500.0
ValidMin
0.0
ValidMax
2000.0
FillValue
-1.0e+31
Particle
ParticleType
Proton
Qualifier
Moment
Qualifier
Scalar
ParticleQuantity
FlowSpeed
AtomicNumber
1
Parameter #5
Name
Solar Wind Proton Temperature, Radial
Set
Time Series defined by using: EPOCH
ParameterKey
Tpr
Description

Solar Wind Proton Temperature, Radial Component

Caveats
The Radial Component of the Proton Temperature is the (1,1) Component of the Temperature Tensor, along the Radial Direction. It is obtained by Integration of the Ion (Proton) Distribution Function.
Cadence
PT1H
Units
°K
RenderingHints
DisplayType
TimeSeries
AxisLabel
H_Temp_radial
ValueFormat
F9.1
ScaleMin
1000.0
ScaleMax
1.1e+06
ValidMin
1000.0
ValidMax
1.1e+06
FillValue
-1.0e+31
Particle
ParticleType
Proton
Qualifier
Component.I
ParticleQuantity
Temperature
AtomicNumber
1
Parameter #6
Name
Solar Wind Alpha Particle to Proton Density Ratio
Set
Time Series defined by using: EPOCH
ParameterKey
alpha_ratio
Description

Solar Wind Alpha Particle to Proton, He++/H+, Density Ratio

Caveats
Alpha Ratio (Na/Np) is the Ratio of the Number Density of Helium++ Ions to the Number Density of Protons
Cadence
PT1H
RenderingHints
DisplayType
TimeSeries
AxisLabel
Na/Np
ValueFormat
F8.4
ScaleMin
0.0
ScaleMax
0.5
ValidMin
0.0
ValidMax
10.0
FillValue
-1.0e+31
Particle
ParticleType
AlphaParticle
ParticleType
Proton
Qualifier
Ratio
Qualifier
Scalar
ParticleQuantity
NumberDensity
AtomicNumber
1
AtomicNumber
2
Parameter #7
Name
Solar Wind Bulk Velocity Vector, GSE, Cartesian Coordinates
Set
Time Series defined by using: EPOCH
ParameterKey
V_GSE
Description

Solar Wind Bulk Velocity Vector, Geocentric Solar Ecliptic, GSE, Cartesian Coordinates

Cadence
PT1H
Units
km/s
UnitsConversion
1.0e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
RenderingHints
DisplayType
TimeSeries
ValueFormat
F8.1
Structure
Size
3
Element
Name
VX (GSE)
Index
1
ValidMin
-1800.0
ValidMax
0.0
RenderingHints
ScaleMin
-1200.0
ScaleMax
0.0
Element
Name
VY (GSE)
Index
2
ValidMin
-900.0
ValidMax
900.0
RenderingHints
ScaleMin
-500.0
ScaleMax
500.0
Element
Name
VZ (GSE)
Index
3
ValidMin
-900.0
ValidMax
900.0
RenderingHints
ScaleMin
-500.0
ScaleMax
500.0
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Vector
Qualifier
Moment
ParticleQuantity
FlowVelocity
Parameter #8
Name
Solar Wind Bulk Velocity Vector, RTN, Cartesian Coordinates
Set
Time Series defined by using: EPOCH
ParameterKey
V_RTN
Description

Solar Wind Bulk Velocity Vector, Radial Tangential Normal, RTN, Cartesian Coordinates

Cadence
PT1H
Units
km/s
UnitsConversion
1.0e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
RTN
RenderingHints
DisplayType
TimeSeries
ValueFormat
F8.1
Structure
Size
3
Element
Name
VR (RTN)
Index
1
ValidMin
0.0
ValidMax
1800.0
RenderingHints
ScaleMin
0.0
ScaleMax
1200.0
Element
Name
VT (RTN)
Index
2
ValidMin
-900.0
ValidMax
900.0
RenderingHints
ScaleMin
-500.0
ScaleMax
500.0
Element
Name
VN (RTN)
Index
3
ValidMin
-900.0
ValidMax
900.0
RenderingHints
ScaleMin
-500.0
ScaleMax
500.0
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Vector
Qualifier
Moment
ParticleQuantity
FlowVelocity
Parameter #9
Name
Solar Wind Bulk Velocity Vector, GSM, Cartesian Coordinates
Set
Time Series defined by using: EPOCH
ParameterKey
V_GSM
Description

Solar Wind Bulk Velocity Vector, Geocentric Solar Magnetospheric, GSM, Cartesian Coordinates

Cadence
PT1H
Units
km/s
UnitsConversion
1.0e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSM
RenderingHints
DisplayType
TimeSeries
ValueFormat
F8.1
Structure
Size
3
Element
Name
VX (GSM)
Index
1
ValidMin
-1800.0
ValidMax
0.0
RenderingHints
ScaleMin
-1200.0
ScaleMax
0.0
Element
Name
VY (GSM)
Index
2
ValidMin
-900.0
ValidMax
900.0
RenderingHints
ScaleMin
-500.0
ScaleMax
500.0
Element
Name
VZ (GSM)
Index
3
ValidMin
-900.0
ValidMax
900.0
RenderingHints
ScaleMin
-500.0
ScaleMax
500.0
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Vector
Qualifier
Moment
ParticleQuantity
FlowVelocity
Parameter #10
Name
Spacecraft Position Vector, GSE, Cartesian Coordinates
Set
Time Series defined by using: EPOCH
ParameterKey
SC_pos_GSE
Description

Spacecraft Position Vector, Geocentric Solar Ecliptic, GSE, Cartesian Coordinates

Caveats
Average Type: standard
Cadence
PT1H
Units
km
UnitsConversion
1.0e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
RenderingHints
DisplayType
TimeSeries
ValueFormat
F9.1
Structure
Size
3
Element
Name
ACE X-GSE
Index
1
ValidMin
-2.0e+06
ValidMax
2.0e+06
RenderingHints
ScaleMin
-2.0e+06
ScaleMax
2.0e+06
Element
Name
ACE Y-GSE
Index
2
ValidMin
-1.0e+06
ValidMax
1.0e+06
RenderingHints
ScaleMin
-1.0e+06
ScaleMax
1.0e+06
Element
Name
ACE Z-GSE
Index
3
ValidMin
-1.0e+06
ValidMax
1.0e+06
RenderingHints
ScaleMin
-1.0e+06
ScaleMax
1.0e+06
FillValue
-1.0e+31
Support
Qualifier
Vector
SupportQuantity
Positional
Parameter #11
Name
Spacecraft Position Vector, GSM, Cartesian Coordinates
Set
Time Series defined by using: EPOCH
ParameterKey
SC_pos_GSM
Description

Spacecraft Position Vector, Geocentric Solar Magnetospheric, GSM, Cartesian Coordinates

Caveats
Average Type: standard
Cadence
PT1H
Units
km
UnitsConversion
1.0e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSM
RenderingHints
DisplayType
TimeSeries
ValueFormat
F9.1
Structure
Size
3
Element
Name
ACE X(GSM)
Index
1
ValidMin
-2.0e+06
ValidMax
2.0e+06
RenderingHints
ScaleMin
-2.0e+06
ScaleMax
2.0e+06
Element
Name
ACE Y(GSM)
Index
2
ValidMin
-1.0e+06
ValidMax
1.0e+06
RenderingHints
ScaleMin
-1.0e+06
ScaleMax
1.0e+06
Element
Name
ACE Z(GSM)
Index
3
ValidMin
-1.0e+06
ValidMax
1.0e+06
RenderingHints
ScaleMin
-1.0e+06
ScaleMax
1.0e+06
FillValue
-1.0e+31
Support
Qualifier
Vector
SupportQuantity
Positional