Version:2.3.0
NumericalData
ResourceID
spase://JAXA/NumericalData/Geotail/CPI/KeyParameter/PT64S
ResourceHeader
ResourceName
Geotail CPI Plasma Key Parameters (64s)
ReleaseDate
2021-04-27 17:52:35Z
Description
A combination of plasma key parameters from the Geotail CPI analyzers.
The CPI-SW Solar Wind Analyzer provides
* Ion number density
* Average proton energy
* Bulk flow velocity
The CPI-HP Hot Plasma Analyzer provides
* Ion number density
* Average proton energy
* Average electron energy
* Bulk flow velocity
* Plasma pressure
The CPI-IC Ion Composition Analyzer provides principal Species
* H+
* He++
* He+
* O+
Contacts
InformationURL
Name
CPI Survey Plots
URL
Description
Geotail CPI description and survey plots.
PriorIDs
spase://VMO/NumericalData/Geotail/CPI/kp_PT64S
spase://VSPO/NumericalData/Geotail/CPI/KeyParameter/PT64S
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
AccessURL
Name
HTTPS from SPDF
URL
Description
In CDF via HTTP from SPDF
AccessURL
Name
CDAWeb
URL
ProductKey
GE_K0_CPI
Format
CDF
Encoding
None
AccessDirectoryTemplate
https://cdaweb.gsfc.nasa.gov/pub/data/geotail/cpi/cpi_k0/$Y
AccessFilenameTemplate
ge_k0_cpi_$Y$m$d_$v.cdf
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb Programmatic Data Access
URL
Style
WebService
ProductKey
GE_K0_CPI
Description
Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS.
Format
Binary
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb HAPI Server
URL
Style
HAPI
ProductKey
GE_K0_CPI
Description
Web Service to this product using the HAPI interface.
Format
CSV
InstrumentIDs
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
1992-09-08 07:30:40
RelativeStopDate
-P2D
Cadence
PT64S
ObservedRegion
Heliosphere.NearEarth
ObservedRegion
Earth.Magnetosheath
ObservedRegion
Earth.Magnetosphere
ObservedRegion
Earth.Magnetosphere.Magnetotail
Caveats
The CPI solar wind ion analyzer is an E/Q analyzer and the initial distribution functions were calculated assuming that the plasma is H+. Care must be taken when multi-component plasmas are present. If He++ is present and is flowing with the same speed as the H+ component, it will contribute to the distribution function at twice the velocity (four times the energy) of the H+. To facilitate the automated processing of the data the integral was evaluated between vmin = 171 km/s and vmax = 1.35 × u . The resulting temperatures produce excellent fits to the observations. When He++ is present the distribution functions are consistent with an He++ temperature, THe++ = 4 × TH+, i.e., the H+ and He++ have similar thermal velocities.
Parameter #1
Name
Time
ParameterKey
Epoch
Description
Time in milliseconds, centered, since CDF Epoch
Units
ms
UnitsConversion
1e-3>s
ValidMin
08-Sep-1992 00:00:00.000
ValidMax
31-Dec-2020 20:00:00.000
FillValue
-1.0E31
Support
Parameter #2
Name
Time
ParameterKey
Time_PB5
Description
Time, centered, in GSFC PB5 format (yr, day, ms). Jan 1 = Day 1.
Structure
Size
3
Element
Name
Year
Index
1
Units
year
ValidMin
1992
ValidMax
2020
FillValue
-2147483648
Element
Name
Day of year
Index
2
Units
day
ValidMin
1
ValidMax
366
FillValue
-2147483648
Element
Name
Elapsed millisecond of day
Qualifier
Component.I
Index
3
Units
ms
ValidMin
0
ValidMax
86400000
FillValue
-2147483648
Support
Parameter #3
Name
Ion Number Density (CPI/SWA)
ParameterKey
SW_P_Den
Description
Ion number density (ions 144-7000 eV, 60x60 deg FOV, CPI/SWA), scalar
Caveats
From 5 deg angular bins.
Units
cm^-3
UnitsConversion
1e6>m^-3
RenderingHints
AxisLabel
n(SWA)
ValueFormat
F8.3
ValidMin
0.01
ValidMax
1000.0
FillValue
-1.0E31
Particle
ParticleType
Proton
ParticleType
AlphaParticle
ParticleType
Ion
Qualifier
Moment
Qualifier
Scalar
ParticleQuantity
NumberDensity
EnergyRange
Low
144
High
7000
Units
eV
AzimuthalAngleRange
Low
-56.25
High
56.25
Units
deg
PolarAngleRange
Low
60
High
120
Units
deg
Parameter #4
Name
Ion Average Energy (CPI/SWA)
ParameterKey
SW_P_AVGE
Description
Ion average energy (ions 144-7000 eV, in the spacecraft frame of reference, CPI/SWA), scalar
Units
eV
UnitsConversion
1.60217653e-19>J
RenderingHints
ValidMin
100.0
ValidMax
8000.0
FillValue
-1.0E31
Particle
ParticleType
Proton
ParticleType
AlphaParticle
ParticleType
Ion
Qualifier
Average
Qualifier
Scalar
ParticleQuantity
Energy
EnergyRange
Low
144
High
7000
Units
eV
AzimuthalAngleRange
Low
-56.25
High
56.25
Units
deg
PolarAngleRange
Low
60
High
120
Units
deg
Parameter #5
Name
Ion bulk Flow Velocity (CPI/SWA)
ParameterKey
SW_V
Description
Ion bulk flow velocity in GSE coordinates (ions 144-7000 eV, 60x60 deg FOV, CPI/SWA)
Caveats
From 5 deg angular bins
Units
km/s
UnitsConversion
1e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
RenderingHints
Structure
Size
3
Element
Name
Vx
Qualifier
Component.I
Index
1
ValidMin
-1400.0
ValidMax
1400.0
FillValue
-1.0E31
Element
Name
Vy
Qualifier
Component.J
Index
2
ValidMin
-1400.0
ValidMax
1400.0
FillValue
-1.0E31
Element
Name
Vz
Qualifier
Component.K
Index
3
ValidMin
-1400.0
ValidMax
1400.0
FillValue
-1.0E31
Particle
ParticleType
Proton
ParticleType
AlphaParticle
ParticleType
Ion
Qualifier
Moment
Qualifier
Vector
ParticleQuantity
FlowVelocity
EnergyRange
Low
144
High
7000
Units
eV
AzimuthalAngleRange
Low
-56.25
High
56.25
Units
deg
PolarAngleRange
Low
60
High
120
Units
deg
Parameter #6
Name
CPI/SWA Data Quality Flag
ParameterKey
Quality_SW
Description
CPI/SWA Data Quality Flag (0: adequate; 100: poor, more problems), scalar
ValidMin
0.0
ValidMax
100.0
FillValue
-1.0E31
Support
Parameter #7
Name
CPI Post Gap Flag
ParameterKey
GAP_FLAG
Description
CPI Post Gap Flag, scalar
* 0: no gap immediately prior to this record;
* 1: gap due to instrument mode;
* 2: gap due to missing SIRIUS data;
* 3: gap due to noisy SIRIUS data;
* 20: gap due to missing Minor Frame(s))
ValidMin
0
ValidMax
20
FillValue
-2147483648
Support
Parameter #8
Name
Ion Number Density (CPI/HPA)
ParameterKey
HP_P_Den
Description
Ion number density (ions 50-50000 eV, equatorial plane, CPI/HPA), scalar
Caveats
The ions are assumed to be protons
Units
cm^-3
UnitsConversion
1e6>m^-3
RenderingHints
AxisLabel
n(HPA)
ValueFormat
F8.3
ValidMin
0.01
ValidMax
1000.0
FillValue
-1.0E31
Particle
ParticleType
Proton
ParticleType
AlphaParticle
ParticleType
Ion
Qualifier
Moment
Qualifier
Scalar
ParticleQuantity
NumberDensity
Parameter #9
Name
Ion Average Energy (CPI/HPA)
ParameterKey
HP_P_AVGE
Description
Ion average energy (ions 50-50000 eV, equatorial plane, CPI/HPA), scalar
Units
eV
UnitsConversion
1.60217653e-19>J
RenderingHints
ValidMin
50.0
ValidMax
50000.0
FillValue
-1.0E31
Particle
ParticleType
Proton
ParticleType
AlphaParticle
ParticleType
Ion
Qualifier
Average
Qualifier
Scalar
ParticleQuantity
Energy
Parameter #10
Name
Ion Bulk Flow Velocity (CPI/HPA)
ParameterKey
HP_V
Description
Bulk ion flow velocity, approximate GSE X-Y components (ions 50-50000 eV, CPI/HPA)
Units
km/s
UnitsConversion
1e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
RenderingHints
Structure
Size
2
Element
Name
Vx
Qualifier
Component.I
Index
1
ValidMin
-4000.0
ValidMax
4000.0
FillValue
-1.0E31
Element
Name
Vy
Qualifier
Component.J
Index
2
ValidMin
-4000.0
ValidMax
4000.0
FillValue
-1.0E31
Particle
ParticleType
Proton
ParticleType
AlphaParticle
ParticleType
Ion
Qualifier
Moment
Qualifier
Vector
ParticleQuantity
FlowVelocity
Parameter #11
Name
Electron Average Energy (CPI/HPA)
ParameterKey
HP_E_AVGE
Description
Average electron energy (electrons 50-50000 eV, CPI/HPA), scalar
Units
eV
UnitsConversion
1.60217653e-19>J
RenderingHints
ValidMin
50.0
ValidMax
50000.0
FillValue
-1.0E31
Particle
ParticleType
Electron
Qualifier
Average
Qualifier
Scalar
ParticleQuantity
Energy
Parameter #12
Name
Plasma Pressure (CPI/HPA)
ParameterKey
W
Description
Plasma pressure (50-50000 eV, CPI/HPA), scalar
Units
Pa
ValidMin
1.0E-15
ValidMax
1.0E-5
FillValue
-1.0E31
Particle
ParticleType
Proton
ParticleType
AlphaParticle
ParticleType
Ion
Qualifier
Scalar
ParticleQuantity
Pressure
Parameter #13
Name
CPI/HPA Data Quality Flag
ParameterKey
Quality_HP
Description
CPI/HPA data quality flag (0: adequate; 100: poor, more problems), scalar
ValidMin
0.0
ValidMax
100.0
FillValue
-1.0E31
Support
Parameter #14
Name
CPI/ICA Data Quality Flag
ParameterKey
Quality_IC
Description
CPI/ICA data quality flag (0: adequate; 100: poor, more problems), scalar
ValidMin
0.0
ValidMax
100.0
FillValue
-1.0E31
Support
Parameter #15
Name
H+ Flag (CPI/ICA)
ParameterKey
H_P_FLAG
Description
H+ flag: non-zero value indicates presence of singly ionized hydrogen, (CPI/ICA), scalar
ValidMin
0
ValidMax
99
FillValue
-128
Support
Parameter #16
Name
He++ Flag (CPI/ICA)
ParameterKey
HE_PP_FLAG
Description
He++ flag: non-zero value indicates presence of doubly ionized helium, (CPI/ICA)), scalar
ValidMin
0
ValidMax
99
FillValue
-128
Support
Parameter #17
Name
He+ Flag
ParameterKey
HE_P_FLAG
Description
He+ flag: non-zero value indicates presence of singly ionized helium, (CPI/ICA), scalar
ValidMin
0
ValidMax
99
FillValue
-128
Support
Parameter #18
Name
O+ Flag (CPI/ICA)
ParameterKey
O_P_FLAG
Description
O+ flag: non-zero value indicates presence of singly ionized atomic oxygen, (CPI/ICA), scalar
ValidMin
0
ValidMax
99
FillValue
-128
Support
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