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IMP 7 LANL 2-m plasma data

ResourceID
spase://NASA/NumericalData/IMP7/LEPEDEA/PT120S

Description

IMP 7 LANL 2-min solar wind plasma parameter data, including temperature anisotropy and alpha/proton ratio

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Details

Version:2.7.1

MetadataRightsList

Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions

Version:2.7.1

NumericalData

ResourceID
spase://NASA/NumericalData/IMP7/LEPEDEA/PT120S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
IMP 7 LANL 2-m plasma data
ReleaseDate
2025-12-04 13:29:33Z
RevisionHistory
RevisionEvent
ReleaseDate
2020-07-07 21:14:38Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-12-04 13:29:33Z
Note
Added MetadataRightsList and RightsList(s). Added ResourceType and NamingAuthority. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB
Description

IMP 7 LANL 2-min solar wind plasma parameter data, including temperature anisotropy and alpha/proton ratio

Contacts
RolePersonStartDateStopDateNote
1.GeneralContactspase://SMWG/Person/John.T.Gosling
2.MetadataContactspase://SMWG/Person/James.M.Weygand
PriorIDs
spase://VSPO/NumericalData/P_IMP7_HDR_LANL_2MIN
spase://VMO/NumericalData/IMP7/LANL/PT120S
spase://VSPO/NumericalData/IMP7/LEPEDEA/PT120S
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
RightsList
Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products
AccessURL
Name
FTPBrowser
URL
https://omniweb.gsfc.nasa.gov/ftpbrowser/imp7_lanl_2m.html
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/imp/imp7/plasma_lanl/solarwind_2min/
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/imp/imp7/plasma_lanl/solarwind_2min/
Description

In CDF via HTTP from SPDF

Format
Text
Acknowledgement
National Aeronautics and Space Administration; National Space Science Data Center and Space Physics Data Facility, Dr John Gosling
ProcessingLevel
Calibrated
ProviderResourceName
Los Alamos National Laboratory IMP-7 Solar Plasma Electrostatic Analyzer data
ProviderProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/IMP7/LEPEDEA
spase://SMWG/Instrument/IMP7/GOSLING
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
1972-10-06 00:00:00
StopDate
1978-09-30 00:00:00
Cadence
PT120S
ObservedRegion
Heliosphere.NearEarth
ObservedRegion
Earth.Magnetosphere
ObservedRegion
Earth.NearSurface
Parameter #1
Name
Spacecraft Identification
ParameterKey
Column_1
Description

String identifying the spacecraft. In this dataset it should be IMP7.

Cadence
PT120S
Support
SupportQuantity
Other
Parameter #2
Name
Universal Time
ParameterKey
Column_2 Column_3 Column_4
Description

The three universal time columns from left to right are: year month day (yymmdd), seconds of the day, and hour minute second (hhmmss).

Cadence
PT120S
Structure
Size
3
Description

Universal Time expressed in two columns yymmdd and hhmms.

Element
Name
Year Month Day (yymmdd)
Index
1
ParameterKey
Column_2
Element
Name
Seconds of the day
Index
2
ParameterKey
Column_3
Units
seconds
Element
Name
Hour Minute Second (hhmmss)
Index
3
ParameterKey
Column_4
Support
SupportQuantity
Temporal
Parameter #3
Name
IMP7 Spacecraft Position Vector in Solar Ecliptic coordinates
ParameterKey
Column_5 Column_6 Column_7
Description

Location of the spacecraft in solar ecliptic coordinates in units of kilometers and degrees.

Cadence
PT120S
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
SE
Structure
Size
3
Element
Name
Radius
Qualifier
Component.I
Index
1
ParameterKey
column_5
Units
km
Element
Name
SELat
Qualifier
Component.J
Index
2
ParameterKey
column_6
Units
degrees
Element
Name
SELong
Qualifier
Component.K
Index
3
ParameterKey
column_7
Units
degrees
Support
SupportQuantity
Positional
Parameter #4
Name
IMP7 Density
ParameterKey
Column_8
Description

IMP7 density values in units of #/cm^3.

Cadence
PT120S
Units
#/cm^3
Particle
ParticleType
Proton
Qualifier
Magnitude
ParticleQuantity
NumberDensity
Parameter #5
Name
IMP7 Flow Speed
ParameterKey
Column_9
Description

IMP7 speed values in units of km/s.

Cadence
PT120S
Units
km/s
Particle
ParticleType
Proton
Qualifier
Magnitude
ParticleQuantity
FlowSpeed
Parameter #6
Name
IMP7 Flow Azimuth
ParameterKey
Column_10
Description

IMP7 flow azimuth direction in units of degrees.

Cadence
PT120S
Units
degrees
Particle
ParticleType
Proton
Qualifier
Magnitude
ParticleQuantity
ArrivalDirection
Parameter #7
Name
Proton Parallel Temperature
ParameterKey
Column_11
Description

Proton temprature in the parallel direction in units of Kelvin.

Cadence
PT120S
Units
K
Particle
ParticleType
Proton
Qualifier
Parallel
ParticleQuantity
Temperature
Parameter #8
Name
Proton Perpendicular Temperature
ParameterKey
Column_12
Description

Proton temprature in the perpendicular direction in units of Kelvin.

Cadence
PT120S
Units
K
Particle
ParticleType
Proton
Qualifier
Perpendicular
ParticleQuantity
Temperature
Parameter #9
Name
Pressure Tensor Symmetry Axis, AZ
ParameterKey
Column_13
Description

Pressure tensor symmetry axis in units of degrees.

Cadence
PT120S
Units
degrees
Particle
ParticleType
Proton
Qualifier
DirectionAngle
ParticleQuantity
Pressure
Parameter #10
Name
Alpha proton ratio
ParameterKey
Column_14
Description

Ratio of alphas to protons.

Cadence
PT120S
Particle
ParticleType
AlphaParticle
ParticleType
Proton
Qualifier
Ratio
ParticleQuantity
NumberDensity
Parameter #11
Name
Flow Speed AP
ParameterKey
Column_15
Description

Relative flow speed of alphas to protons in units of km/s.

Cadence
PT120S
Units
km/s
Particle
ParticleType
AlphaParticle
ParticleType
Proton
Qualifier
Magnitude
ParticleQuantity
FlowSpeed
Parameter #12
Name
Flow Azimuth AP
ParameterKey
Column_16
Description

Relative Flow Angle of alphas to protons in units of degrees.

Cadence
PT120S
Units
degrees
Particle
ParticleType
AlphaParticle
ParticleType
Proton
Qualifier
Magnitude
ParticleQuantity
ArrivalDirection
Parameter #13
Name
Alpha proton temperature ratio
ParameterKey
Column_17
Description

Ratio of the temperature of the alphas to the temperature of the protons.

Cadence
PT120S
Particle
ParticleType
AlphaParticle
ParticleType
Proton
Qualifier
Ratio
ParticleQuantity
Temperature
Parameter #14
Name
Alpha Temperature Anisotropy
ParameterKey
Column_18
Description

Alpha temperature anisotropy of perpendicular temperature to parallel temperature.

Cadence
PT120S
Particle
ParticleType
AlphaParticle
Qualifier
Anisotropy
ParticleQuantity
Temperature
Parameter #15
Name
Alpha Pressure Tensor Symmetry Axis, AZ
ParameterKey
Column_19
Description

Alpha pressure tensor symmetry axis in units of degrees.

Cadence
PT120S
Units
degrees
Particle
ParticleType
AlphaParticle
Qualifier
DirectionAngle
ParticleQuantity
Pressure