AMPTE/IRM Data

AMPTE-IRM Plasma Data

ResourceID

spase://VSPO/NumericalData/AMPTE-IRM/Plasma/PT4.4S

Description

AMPT-IRM spin-averaged plasma moments at ~4.4 second resolution.

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Details

Version:2.2.9

NumericalData

ResourceID

spase://VSPO/NumericalData/AMPTE-IRM/Plasma/PT4.4S

ResourceHeader

ResourceName: AMPTE-IRM Plasma Data

ReleaseDate: 2018-04-18 16:35:54Z

Description

AMPT-IRM spin-averaged plasma moments at ~4.4 second resolution.

Acknowledgement: User will acknowledge the AMPTE-IRM 3-D Plasma Analyser team in any publication resulting from the use of these data.

Contacts

	Role	Person
1.	PrincipalInvestigator	spase://SMWG/Person/Goetz.Paschmann
2.	DataProducer	spase://SMWG/Person/Lynn.M.Kistler

InformationURL

Name: AMPTE/IRM page at University of New Hampshire

URL: http://www-ssg.sr.unh.edu/index.html?tof/Missions/Ampte-irm

Description

Information on the AMPTE/IRM data

PriorIDs

spase://VMO/NumericalData/AMPTE_IRM/Plasma/PT4.4S

spase://VMO/NumericalData/AMPTE-IRM/Plasma/PT4.4S

AccessInformation

RepositoryID: spase://SMWG/Repository/NASA/GSFC/VHO-VMO

Availability: Online

AccessRights: Open

AccessURL

Name: AMPTE/IRM Data

URL: https://vmo.nasa.gov/mission/ampte_irm/

Description

A web-accessible directory hosting AMPTE/IRM spin-averaged magnetic field and plasma data.

Format: Text

Encoding: ASCII

InstrumentIDs

spase://SMWG/Instrument/AMPTE-IRM/Plasma

MeasurementType: Ephemeris

MeasurementType: ThermalPlasma

TemporalDescription

TimeSpan

StartDate: 1984-08-22 12:58:03

StopDate: 1986-08-11 21:32:28

Cadence: PT4.4S

ObservedRegion: Earth.Magnetosheath

ObservedRegion: Earth.Magnetosphere

ObservedRegion: Earth.Magnetosphere.Magnetotail

ObservedRegion: Heliosphere.NearEarth

Caveats: The only moment which should be used in the solar wind is proton bulk velocity. The spin period changed from ~4.3s to ~4.7s during the mission. IRM time stamps are UT at time of ground receipt. Thus for time-critical science, the IRM times need to be corrected by subtracting the light travel time from the spacecraft to the ground-station (at Weilheim in Germany apart special events requiring NASA DSN). For the transmission frequencies used, the vacuum light speed is appropriate. At apogee, this correction is more than a third of a second. There are no other known time delays.

Parameter #1

Name: Time

ParameterKey: Column 1

Description

The center of the accumulation time interval for the data point, in DA/MO/YR HR:MI:SS format.

Support

SupportQuantity: Temporal

Parameter #2

Name: DT

ParameterKey: Column 2

Description

The accumulation time for the measurement, normally one spin

Units: s

Support

SupportQuantity: Temporal

Parameter #3

Name: Xgse

ParameterKey: Column 3

Description

The X component of spacecraft location in GSE, in Re (Re=6378 km)

Units: Re

UnitsConversion: 6.378e6>m

CoordinateSystem

CoordinateRepresentation: Cartesian

CoordinateSystemName: GSE

Structure

Size: 1

Element

Name: Xgse

Qualifier: Component.I

Index: 1

Support

SupportQuantity: Positional

Parameter #4

Name: Ygse

ParameterKey: Column 4

Description

The Y component of spacecraft location in GSE, in Re (Re=6378 km)

Units: Re

UnitsConversion: 6.378e6>m

CoordinateSystem

CoordinateRepresentation: Cartesian

CoordinateSystemName: GSE

Structure

Size: 1

Element

Name: Ygse

Qualifier: Component.J

Index: 1

Support

SupportQuantity: Positional

Parameter #5

Name: Zgse

ParameterKey: Column 5

Description

The Z component of spacecraft location in GSE, in Re (Re=6378 km)

Units: Re

UnitsConversion: 6.378e6>m

CoordinateSystem

CoordinateRepresentation: Cartesian

CoordinateSystemName: GSE

Structure

Size: 1

Element

Name: Zgse

Qualifier: Component.K

Index: 1

Support

SupportQuantity: Positional

Parameter #6

Name: Rgse

ParameterKey: Column 6

Description

Radial distance in SM, in Re (Re=6378 km)

Units: Re

UnitsConversion: 6.378e6>m

CoordinateSystem

CoordinateRepresentation: Spherical

CoordinateSystemName: SM

Support

Qualifier: Magnitude

SupportQuantity: Positional

Parameter #7

Name: MLAT

ParameterKey: Column 7

Description

Magnetic latitude in SM, in degrees

CoordinateSystem

CoordinateRepresentation: Spherical

CoordinateSystemName: SM

Support

Qualifier: DirectionAngle.ElevationAngle

SupportQuantity: Positional

Parameter #8

Name: MLT

ParameterKey: Column 8

Description

Magnetic Local Time in SM, in hours

Units: hour

UnitsConversion: 15>deg

CoordinateSystem

CoordinateRepresentation: Spherical

CoordinateSystemName: SM

Support

Qualifier: DirectionAngle.AzimuthAngle

SupportQuantity: Positional

Parameter #9

Name: Np

ParameterKey: Column 9

Description

Number density of protons

Units: cm^-3

UnitsConversion: 1e6>m^-3

Particle

ParticleType: Proton

Qualifier: Moment

Qualifier: Scalar

ParticleQuantity: NumberDensity

Parameter #10

Name: Vp

Description

Velocity of protons

Units: km/s

UnitsConversion: 1.0e3>m/s

CoordinateSystem

CoordinateRepresentation: Cartesian

CoordinateSystemName: GSE

Structure

Size: 3

Element

Name: Vx_p

Qualifier: Component.I

Index: 1

ParameterKey: Column 10

Element

Name: Vy_p

Qualifier: Component.J

Index: 2

ParameterKey: Column 11

Element

Name: Vz_p

Qualifier: Component.K

Index: 3

ParameterKey: Column 12

Particle

ParticleType: Proton

Qualifier: Moment

Qualifier: Vector

ParticleQuantity: Velocity

Parameter #11

Name: Tp

ParameterKey: Column 13

Description

Temperature of protons

Units: MK

UnitsConversion: 1e6>K

Particle

ParticleType: Proton

Qualifier: Moment

Qualifier: Scalar

ParticleQuantity: Temperature

Parameter #12

Name: Ne

ParameterKey: Column 14

Description

Number density of electrons

Units: cm^-3

UnitsConversion: 1e6>m^-3

Particle

ParticleType: Electron

Qualifier: Moment

Qualifier: Scalar

ParticleQuantity: NumberDensity

Parameter #13

Name: Ve

Description

Velocity of electrons

Caveats: The electron velocity is rarely correct, due to photoeletrons and/or missing real electrons at low energies. Please do not use for quantitative work.

Units: km/s

UnitsConversion: 1.0e3>m/s

CoordinateSystem

CoordinateRepresentation: Cartesian

CoordinateSystemName: GSE

Structure

Size: 3

Element

Name: Vx_e

Qualifier: Component.I

Index: 1

ParameterKey: Column 15

Element

Name: Vy_e

Qualifier: Component.J

Index: 2

ParameterKey: Column 16

Element

Name: Vz_e

Qualifier: Component.K

Index: 3

ParameterKey: Column 17

Particle

ParticleType: Electron

Qualifier: Moment

Qualifier: Vector

ParticleQuantity: Velocity

Parameter #14

Name: Te

ParameterKey: Column 18

Description

Temperature of electrons

Units: MK

UnitsConversion: 1e6>K

Particle

ParticleType: Electron

Qualifier: Moment

Qualifier: Scalar

ParticleQuantity: Temperature