Version:2.3.0

NumericalData

ResourceHeader

ResourceName

Geotail CPI Hot Plasma Moments

AlternateName

Geotail CPI HPA High Time Resolution Plasma Moments

ReleaseDate

2019-08-05 15:03:35Z

Description

The CPI/HPA Hot Plasma Analyzer high time resolution moments of hot plasma:

        * Ion number density
        * Ion average temperature
        * Ion bulk flow velocity
        * Electron number density
        * Electron average temperature

        The CPI/HPA data are good in the magnetosphere and may be usefull in the magnetosheath.

Contacts

	Role	Person
1.	PrincipalInvestigator	spase://SMWG/Person/Louis.A.Frank
2.	DataProducer	spase://SMWG/Person/William.R.Paterson
3.	MetadataContact	spase://SMWG/Person/Jan.Merka

InformationURL

Name

CPI Survey Plots

URL

http://www-pi.physics.uiowa.edu/cpi/

Description

Geotail CPI description and survey plots.

PriorIDs

spase://VMO/NumericalData/Geotail/CPI/UIOWA_HPA_PT64S

spase://VMO/NumericalData/Geotail/CPI/HPA_PT64S

spase://VSPO/NumericalData/Geotail/CPI/HPA/PT64S

AccessInformation

RepositoryID

spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb

Availability

Online

AccessRights

Open

AccessURL

Name

FTP access to files at SPDF

URL

ftps://spdf.gsfc.nasa.gov/pub/data/geotail/cpi/cpi_hpamom/

AccessURL

Name

HTTP access to files at SPDF

URL

https://spdf.gsfc.nasa.gov/pub/data/geotail/cpi/cpi_hpamom/

Description

In CDF via HTTP from SPDF

AccessURL

Name

CDAWeb

URL

https://cdaweb.sci.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=GE_HPAMOM_CPI&index=sp_phys

ProductKey

GE_HPAMOM_CPI

Format

CDF

Encoding

None

AccessInformation

RepositoryID

spase://SMWG/Repository/UIowa/ParticlesImagingGroup

Availability

Online

AccessRights

Open

AccessURL

Name

University of Iowa: Geotail CPI HPA high time resolution data

URL

http://www-pi.physics.uiowa.edu/cpi-data/hp/

Format

Text

Encoding

ASCII

MeasurementType

ThermalPlasma

TemporalDescription

TimeSpan

StartDate

1992-10-06 00:00:28

RelativeStopDate

-P2Y

Cadence

PT64S

ObservedRegion

Earth.Magnetosheath

ObservedRegion

Earth.Magnetosphere

ObservedRegion

Earth.Magnetosphere.Magnetotail

Caveats

The electron sensors for the CPI HP analyzer require regular intercalibration. Also, their sensitivity declined over time. A detrending factor is applied so that average electron densities are consistent with ion densities. The HP ion data and the electron data are good through a the end of 2005. The sensitivity decline had been linear until the end of 2005, but hasn't been checked for 2006 or 2007. That may affect the HP electron parameters for 2006 and 2007, but not the HP ion parameters. In June of 2007, the HP sensor bias voltage was raised to improve the electron gain, which over the course of 15 years had dropped by about half. This requires recalibration of both the HP ion sensors and the HP electron sensors.

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

SupportQuantity

Temporal

Parameter #2

Name

Ni

ParameterKey

Density_i

Description

Ion number density (Hot Plasma Analyzer), scalar

Caveats

The ions are assumed to be protons

Units

cm^-3

UnitsConversion

1e6>m^-3

RenderingHints

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 #3

Name

Ti

ParameterKey

Temp_i

Description

Kinetic temperature of HPA ions, scalar

Caveats

Calculated by integrating the distribution function

Units

Component.K

RenderingHints

ValueFormat

F11.0

ValidMin

10000.0

ValidMax

5.0E8

FillValue

-1.0E31

Particle

ParticleType

Proton

ParticleType

AlphaParticle

ParticleType

Ion

Qualifier

Moment

Qualifier

Scalar

ParticleQuantity

Temperature

Parameter #4

Name

Vi

ParameterKey

Velocity_i

Description

Ion bulk flow velocity vector in GSE coordinates

Units

km/s

UnitsConversion

1e3>m/s

CoordinateSystem

CoordinateRepresentation

Cartesian

CoordinateSystemName

GSE

RenderingHints

ValueFormat

F9.2

Structure

Size

3

Element

Name

Vx GSE

Qualifier

Component.I

Index

1

ValidMin

-1400.0

ValidMax

1400.0

FillValue

-1.0E31

Element

Name

Vy GSE

Qualifier

Component.J

Index

2

ValidMin

-1400.0

ValidMax

1400.0

FillValue

-1.0E31

Element

Name

Vz GSE

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

Parameter #5

Name

Ne

ParameterKey

Density_e

Description

Electron number density (Hot Plasma Analyzer), scalar

Units

cm^-3

UnitsConversion

1e6>m^-3

RenderingHints

ValueFormat

F8.3

ValidMin

0.01

ValidMax

1000.0

FillValue

-1.0E31

Particle

ParticleType

Electron

Qualifier

Moment

Qualifier

Scalar

ParticleQuantity

NumberDensity

Parameter #6

Name

Te

ParameterKey

Temp_e

Description

Kinetic temperature of HPA electrons, scalar

Caveats

Calculated by integrating the distribution function

Units

Component.K

RenderingHints

ValueFormat

F11.0

ValidMin

10000.0

ValidMax

5.0E8

FillValue

-1.0E31

Particle

ParticleType

Electron

Qualifier

Moment

Qualifier

Scalar

ParticleQuantity

Temperature