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STEREO-A PLasma and Supra-Thermal Ion Composition (PLASTIC) He⁺ Counts and Relative Energy Flux in four Velocity Ranges normalized by the Solar Wind Speed, Level 3 (L3), Daily Data

ResourceID
spase://NASA/NumericalData/STEREO-A/PLASTIC/HeliumPlusParameter/P1D

Description

STEREO-A Plasma and Suprathermal Ion Composition, Singly-charged Helium, He⁺, counts and relative differential energy fluxes binned by the ion speed relative to the solar wind bulk speed, four speed ratio bins.

STEREO PLASTIC daily suprathermal He⁺ pickup ion signatures include He⁺ energy spectra, directional information, and contenxt information, such as the H⁺ plasma velocity. The four speed ratio, V/Vsw, bin ranges of are: 1.44 to 1.85, 1.85 to 2.50, 2.50 to 3.50, and 3.50 to 8.00.

The identification of He⁺ is based on the measurement of energy per charge, E/q, time-of-flight, TOF, and total energy deposited in the solid state detector, SSD. These data include double coincidence measurements by using E/Qi and TOF and triple coincidence measurements by using E/Q, TOF, and SSD, see for example Galvin et al., Space Sci. Rev. 136, p 437-468, 2008.

The proton bulk parameters including speed, Vsw, thermal velocity, Vth, and Density, Np, in this file are derived from a one-deminsional, 1-D, Maxwellian fit to a single detector rate with no coincidence required. These proton bulk parameters are corrected for background and dead time. The software version number used to derive the proton bulk parameters is shown in the file header and is described in the section on file formats. The most recent update of the proton bulk parameters can be found on the following STEREO website:

http://stereo-ssc.nascom.nasa.gov/data/ins_data/plastic/level2/Protons/

For a full explanation, see the description at:

https://stereo-ssc.nascom.nasa.gov/data/ins_data/plastic/level3/HePlus/HePlus_flux/READ_ME_PLASTIC_HePlus_Fluxes.pdf

The singly-charged Helium, He⁺, flux data are also available from the STEREO Science Center in ASCII format via: https://stereo-ssc.nascom.nasa.gov/data/ins_data/plastic/level3/HePlus/

Note that this SPASE Numerical Description only describes the MESSENGER Magnetometer data stored in Common Data Files.

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Details

Version:2.3.2

NumericalData

ResourceID
spase://NASA/NumericalData/STEREO-A/PLASTIC/HeliumPlusParameter/P1D
ResourceHeader
ResourceName
STEREO-A PLasma and Supra-Thermal Ion Composition (PLASTIC) He⁺ Counts and Relative Energy Flux in four Velocity Ranges normalized by the Solar Wind Speed, Level 3 (L3), Daily Data
ReleaseDate
2021-04-27 15:38:11Z
Description

STEREO-A Plasma and Suprathermal Ion Composition, Singly-charged Helium, He⁺, counts and relative differential energy fluxes binned by the ion speed relative to the solar wind bulk speed, four speed ratio bins.

STEREO PLASTIC daily suprathermal He⁺ pickup ion signatures include He⁺ energy spectra, directional information, and contenxt information, such as the H⁺ plasma velocity. The four speed ratio, V/Vsw, bin ranges of are: 1.44 to 1.85, 1.85 to 2.50, 2.50 to 3.50, and 3.50 to 8.00.

The identification of He⁺ is based on the measurement of energy per charge, E/q, time-of-flight, TOF, and total energy deposited in the solid state detector, SSD. These data include double coincidence measurements by using E/Qi and TOF and triple coincidence measurements by using E/Q, TOF, and SSD, see for example Galvin et al., Space Sci. Rev. 136, p 437-468, 2008.

The proton bulk parameters including speed, Vsw, thermal velocity, Vth, and Density, Np, in this file are derived from a one-deminsional, 1-D, Maxwellian fit to a single detector rate with no coincidence required. These proton bulk parameters are corrected for background and dead time. The software version number used to derive the proton bulk parameters is shown in the file header and is described in the section on file formats. The most recent update of the proton bulk parameters can be found on the following STEREO website:

http://stereo-ssc.nascom.nasa.gov/data/ins_data/plastic/level2/Protons/

For a full explanation, see the description at:

https://stereo-ssc.nascom.nasa.gov/data/ins_data/plastic/level3/HePlus/HePlus_flux/READ_ME_PLASTIC_HePlus_Fluxes.pdf

The singly-charged Helium, He⁺, flux data are also available from the STEREO Science Center in ASCII format via: https://stereo-ssc.nascom.nasa.gov/data/ins_data/plastic/level3/HePlus/

Note that this SPASE Numerical Description only describes the MESSENGER Magnetometer data stored in Common Data Files.

Acknowledgement
Please acknowledge the Principal Investigator, Dr. Antoinette Galvin of the University of New Hampshire, and NASA contract NAS5-00132.. See the rules of use available at http://stereo.sr.unh.edu/data/PLASTIC_Resources/index.htm.
Contacts
RolePerson
1.PrincipalInvestigatorspase://SMWG/Person/Antoinette.B.Galvin
2.MetadataContactspase://SMWG/Person/Robert.M.Candey
3.MetadataContactspase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
STEREO PLASTIC Instrument web site, UNH
URL
Description

STEREO Plasma and Supra-Thermal Ion Composition, PLASTIC, instrument web site, release notes, status, and other information, hosted by University of New Hampshire, UNH

Language
en
InformationURL
Name
STEREO PLASTIC Index web site, UNH
URL
Description

STEREO PLASTIC instrument resources web site, hosted by University of New Hampshire, UNH

Language
en
InformationURL
Name
NSSDC Master Catalog, STEREO A, PLASTIC instrument
URL
Description

General information concerning the STEREO A, Plasma and Supra-Thermal Ion Composition, PLASTIC, instrument

Language
en
InformationURL
Name
STEREO PLASTIC He⁺ Fluxes Readme file, UNH
URL
Description

Readme for STEREO PLASTIC daily suprathermal He⁺ relative fluxes, last update: November 06, 2017

Language
en
PriorIDs
spase://VSPO/NumericalData/STEREO-A/PLASTIC/he_plus_parameters/24HR
spase://VSPO/NumericalData/STEREO-A/PLASTIC/HeliumPlusParameter/P1D
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
Description

Access to Data in CDF Format via ftp from SPDF

AccessURL
Name
HTTPS from SPDF
URL
Description

Access to Data in CDF Format via http from SPDF

AccessURL
Name
CDAWeb
URL
ProductKey
STA_L3_PLA_HEPLUS_24HR
Description

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

Format
CDF
Encoding
None
Acknowledgement
Please acknowledge the Principal Investigator A.B. Galvin. Please acknowledge the Data Providers and CDAWeb when using these Data.
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb HAPI Server
URL
Style
HAPI
ProductKey
STA_L3_PLA_HEPLUS_24HR
Description

Web Service to this product using the HAPI interface.

Format
CSV
Acknowledgement
Please acknowledge the Principal Investigator A.B. Galvin. Please acknowledge the Data Providers and CDAWeb when using these Data.
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Format
CDF
ProcessingLevel
Calibrated
InstrumentIDs
MeasurementType
EnergeticParticles
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
2007-04-01 00:00:00.000
StopDate
2017-07-31 00:00:00.000
Cadence
P1D
ObservedRegion
Heliosphere.Remote1AU
Parameter #1
Name
Epoch Time, since 0 AD
ParameterKey
epoch
Description

Epoch Time Tags, time since 0 AD, beginning of interval

Caveats
This Parameter exhibits an increasing Monotonic Progression
Cadence
P1D
Units
ms
UnitsConversion
1.0e-3>s
RenderingHints
AxisLabel
Epoch
ValueFormat
E14.8
ScaleType
LinearScale
ValidMin
01-Jan-1990 00:00:00.000
ValidMax
31-Dec-2030 00:00:00.000
FillValue
31-Dec-9999 23:59:59.999
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
P1D
RenderingHints
ScaleType
LinearScale
Structure
Size
3
Element
Name
Year
Index
1
Units
a
ValidMin
1997
ValidMax
2030
Element
Name
Day of Year (Jan 1 = Day 1)
Index
2
Units
d
ValidMin
237
ValidMax
365
Element
Name
Elapsed milliseconds of day
Index
3
Units
ms
ValidMin
0
ValidMax
0
FillValue
-2147483648
Support
Qualifier
Array
SupportQuantity
Temporal
Parameter #3
Name
Data Processing Date
ParameterKey
processing_date
Description

Data Processing Date

Caveats
The date and time when the CDF was created
Cadence
P1D
RenderingHints
AxisLabel
Processing_date
ValueFormat
A32
ValidMin
01-Jan-2007 00:00:00.000
ValidMax
31-Dec-2030 00:00:00.000
Support
SupportQuantity
Temporal
Parameter #4
Name
Data Input File
ParameterKey
input_file
Description

Data Input File

Cadence
P1D
RenderingHints
AxisLabel
Input_file
ValueFormat
A34
Support
SupportQuantity
Other
Parameter #5
Name
Proton Bulk Speed, 1-D Fit
Set
Time series defined by using: EPOCH
ParameterKey
proton_bulk_speed
Description

Proton Bulk Speed, from one-dimensional Maxwellian Fit

Cadence
P1D
Units
km/s
UnitsConversion
1.0e3>m/s
RenderingHints
DisplayType
TimeSeries
AxisLabel
Proton Speed
ValueFormat
E11.3
ValidMin
200.0
ValidMax
3000.0
FillValue
-1.0e+31
Particle
ParticleType
Proton
Qualifier
Scalar
ParticleQuantity
Velocity
AtomicNumber
1
Parameter #6
Name
Proton Thermal Speed, 1-D Fit
Set
Time series defined by using: EPOCH
ParameterKey
proton_thermal_speed
Description

Proton Thermal Speed, from one-dimensional Maxwellian Fit

Cadence
PT1M
Units
km/s
UnitsConversion
1.0e3>m/s
RenderingHints
DisplayType
TimeSeries
AxisLabel
Proton Thermal_Speed
ValueFormat
E9.2
ValidMin
0.0
ValidMax
500.0
FillValue
-1.0e+31
Particle
ParticleType
Proton
Qualifier
Scalar
ParticleQuantity
ThermalSpeed
AtomicNumber
1
Parameter #7
Name
Proton Number Density, 1-D Fit
Set
Time series defined by using: EPOCH
ParameterKey
proton_number_density
Description

Proton Number Density, from one-dimensional Maxwellian Fit

Cadence
P1D
Units
cm^-3
UnitsConversion
1.0e6>m^-3
RenderingHints
DisplayType
TimeSeries
AxisLabel
Proton No. Density
ValueFormat
E9.2
ValidMin
0.0
ValidMax
500.0
FillValue
-1.0e+31
Particle
ParticleType
Proton
Qualifier
Scalar
ParticleQuantity
NumberDensity
AtomicNumber
1
Parameter #8
Name
Singly charged Helium, Relative Energy Flux
Set
Time series defined by using: EPOCH
ParameterKey
he_plus_rel_energy_flux
Description

Singly charged Helium, He⁺, Relative Energy Flux in four ranges of the ion velocity divided by the solar wind bulk speed, V/Vsw.

Caveats
Range 0: 8.00>V/Vsw>3.50, Range 1: 3.50>V/Vsw>2.50, Range 2: 2.50>V/Vsw>1.85, Range 3: 1.85>V/Vsw>1.44, unit proportional to differential energy flux: keV/(cm^ sr keV)
Cadence
P1D
Units
s^-1
RenderingHints
DisplayType
TimeSeries
ValueFormat
E9.2
Structure
Size
4
Element
Name
He+_Rel_EFlux_8.0>V/Vsw>3.5
Index
1
Element
Name
He+_Rel_EFlux_3.5>V/Vsw>2.5
Index
2
Element
Name
He+_Rel_EFlux_2.5>V/Vsw>1.85
Index
3
Element
Name
He+_Rel_EFlux_1.85>V/Vsw>1.44
Index
4
ValidMin
0.0
ValidMax
300.0
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Array
ParticleQuantity
NumberFlux
AtomicNumber
2
Parameter #9
Name
Singly charged Helium, Counts
Set
Time series defined by using: EPOCH
ParameterKey
he_plus_counts
Description

Singly charged Helium, He⁺, Counts in four ranges of the ion velocity divided by the solar wind bulk speed, V/Vsw.

Caveats
Range 0: 8.00>V/Vsw>3.50, Range 1: 3.50>V/Vsw>2.50, Range 2: 2.50>V/Vsw>1.85, Range 3: 1.85>V/Vsw>1.44, unit proportional to differential energy flux: keV/(cm^ sr keV)
Cadence
P1D
RenderingHints
DisplayType
TimeSeries
ValueFormat
E9.2
Structure
Size
4
Element
Name
He+_Cts_8.0>V/Vsw>3.5
Index
1
Element
Name
He+_Cts_3.5>V/Vsw>2.5
Index
2
Element
Name
He+_Cts_2.5>V/Vsw>1.85
Index
3
Element
Name
He+_Cts_1.85>V/Vsw>1.44
Index
4
ValidMin
0.0
ValidMax
200000.0
FillValue
-1.0e+31
Particle
ParticleType
Ion
Qualifier
Array
ParticleQuantity
Counts
AtomicNumber
2