Version:2.3.0

NumericalData

ResourceHeader

ResourceName

Geotail CPI Definitive Solar Wind Moments

ReleaseDate

2019-08-05 15:03:35Z

Description

The CPI Solar Wind analyzer definitive plasma moments. The CPI/SW data are good in the solar wind and may be usefull in the magnetosheath.

Contacts

	Role	Person
1.	PrincipalInvestigator	spase://SMWG/Person/Louis.A.Frank
2.	DataProducer	spase://SMWG/Person/Kent.L.Ackerson
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_PT48S

spase://VMO/NumericalData/Geotail/CPI/SWA_PT48S

spase://VSPO/NumericalData/Geotail/CPI/SWA/PT48S

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_h0/

AccessURL

Name

HTTP access to files at SPDF

URL

https://spdf.gsfc.nasa.gov/pub/data/geotail/cpi/cpi_h0/

Description

In CDF via HTTP from SPDF

AccessURL

Name

CDAWeb

URL

https://cdaweb.sci.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=GE_H0_CPI&index=sp_phys

ProductKey

GE_H0_CPI

Format

CDF

Encoding

None

AccessInformation

RepositoryID

spase://SMWG/Repository/UIowa/ParticlesImagingGroup

Availability

Online

AccessRights

Open

AccessURL

Name

University of Iowa: Geotail CPI SW data

URL

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

Format

Text

Encoding

ASCII

MeasurementType

ThermalPlasma

MeasurementType

IonComposition

TemporalDescription

TimeSpan

StartDate

1992-09-28 00:00:33

RelativeStopDate

-P2M

Cadence

PT48S

ObservedRegion

Heliosphere.NearEarth

ObservedRegion

Earth.Magnetosheath

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

SupportQuantity

Temporal

Parameter #2

Name

Vi GSE (r,theta,phi)

ParameterKey

SW_V

Description

Ion bulk flow velocity vector in spherical GSE coordinates

Caveats

From 5 deg angular bins

Units

km/s

UnitsConversion

1e3>m/s

CoordinateSystem

CoordinateRepresentation

Spherical

CoordinateSystemName

GSE

RenderingHints

ValueFormat

F9.2

Structure

Size

3

Element

Name

Vr

Qualifier

Magnitude

Index

1

Units

km/s

ValidMin

0.0

ValidMax

1200.0

FillValue

-1.0E31

Element

Name

Vtheta

Qualifier

DirectionAngle.ElevationAngle

Index

2

Units

deg

ValidMin

0.0

ValidMax

180.0

FillValue

-1.0E31

Element

Name

Vphi

Qualifier

DirectionAngle.AzimuthAngle

Index

3

Units

deg

ValidMin

0.0

ValidMax

360.0

FillValue

-1.0E31

Particle

ParticleType

Proton

ParticleType

AlphaParticle

ParticleType

Ion

Qualifier

Moment

Qualifier

Vector

ParticleQuantity

FlowVelocity

Parameter #3

Name

Vi GSE

ParameterKey

SW_Vc

Description

Ion bulk flow velocity vector in GSE cartesian coordinates

Caveats

From 5 deg angular bins

Units

km/s

UnitsConversion

1e3>m/s

CoordinateSystem

CoordinateRepresentation

Cartesian

CoordinateSystemName

GSE

RenderingHints

ValueFormat

F7.0

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

Parameter #4

Name

Ti

ParameterKey

SW_T

Description

Kinetic temperature of hydrogen component of solar wind, scalar

Caveats

Calculated by integrating the distribution function

Units

Component.K

RenderingHints

ValueFormat

F7.0

ValidMin

10000.0

ValidMax

1.0E7

FillValue

-1.0E31

Particle

ParticleType

Proton

Qualifier

Moment

Qualifier

Scalar

ParticleQuantity

Temperature

Parameter #5

Name

Np

ParameterKey

SW_P_Den

Description

Ion number density (SWA), scalar

Caveats

Assuming no helium (0.3 - several hundred) if the density is less than 0.3/cc the higher moments (velocity, temperature) shall not be used because of the poor counting statistics.

Units

cm^-3

UnitsConversion

1e6>m^-3

RenderingHints

ValueFormat

F8.3

ValidMin

0.01

ValidMax

1000.0

FillValue

-1.0E31

Particle

ParticleType

Proton

Qualifier

Moment

Qualifier

Scalar

ParticleQuantity

NumberDensity

Parameter #6

Name

Psw

ParameterKey

SW_Pressure

Description

Ion pressure (assuming protons measured and adding 5% alphas, from SWA), scalar

Caveats

Assuming Vp = Va, P = C * Np * mp * Vp*Vp * [1 + 4(.05)]. mp = 1.67 * 10^(-27), C = 10^(21), Np in #/cc, Vp in km/s. Pressure not provided for density less than 0.3/cc because of the poor counting statistics.

Units

nPa

UnitsConversion

1e-9>Pa

ValidMin

1.0E-4

ValidMax

100.0

FillValue

-1.0E31

Particle

ParticleType

Proton

ParticleType

AlphaParticle

ParticleType

Ion

Qualifier

Scalar

ParticleQuantity

Pressure