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IMP 7 LANL 1-hr plasma data

ResourceID
spase://NASA/NumericalData/IMP7/LEPEDEA/PT60M

Description

This set of IMP 7 LANL 1-hour solar wind plasma parameter data includes temperature anisotropy and alpha/proton ratio. This hourly resolution data set was created at NSSDC in the year 2003 by averaging 2-min resolution solar wind data provided over the years by LANL. Magnetosheath data were excluded from the 2-min data by LANL. This data set supersedes hourly solar wind data provided by LANL over the years.

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Version:2.2.9

NumericalData

ResourceID
spase://NASA/NumericalData/IMP7/LEPEDEA/PT60M
ResourceHeader
ResourceName
IMP 7 LANL 1-hr plasma data
ReleaseDate
2020-07-07 21:14:38Z
Description

This set of IMP 7 LANL 1-hour solar wind plasma parameter data includes temperature anisotropy and alpha/proton ratio. This hourly resolution data set was created at NSSDC in the year 2003 by averaging 2-min resolution solar wind data provided over the years by LANL. Magnetosheath data were excluded from the 2-min data by LANL. This data set supersedes hourly solar wind data provided by LANL over the years.

Acknowledgement
Please acknowledge NASA Space Physics Data Facility, National Space Science Data Center and the Principal Investigator for data usage.
Contacts
RolePersonStartDateStopDateNote
1.GeneralContactspase://SMWG/Person/John.T.Gosling
PriorIDs
spase://VSPO/NumericalData/P_IMP7_HDR_LANL_1HR
spase://VMO/NumericalData/IMP7/LANL/PT1H
spase://VSPO/NumericalData/IMP7/LEPEDEA/PT60M
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
AccessURL
Name
HTTPS from SPDF
URL
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
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
1972-10-06 00:00:00
StopDate
1978-09-30 00:00:00
Cadence
PT60M
ObservedRegion
Heliosphere.NearEarth
ObservedRegion
Earth.Magnetosphere
ObservedRegion
Earth.NearSurface
Parameter #1
Name
Universal Time
ParameterKey
Column_1 Column_2 Column_3
Description

The three universal time columns from left to right are: year, day of year, and hour of the day.

Cadence
PT1H
Structure
Size
3
Description

Universal Time expressed in two columns yymmdd and hhmms.

Element
Name
Year
Index
1
ParameterKey
Column_1
Units
year
Element
Name
day of year
Index
2
ParameterKey
Column_2
Units
days
Element
Name
Hour of the day
Index
3
ParameterKey
Column_3
Units
hours
Support
SupportQuantity
Temporal
Parameter #2
Name
Number of Points
ParameterKey
Column_4
Description

Numer of points to determine average values. Not entirely clear if this is correct interpretation from the descripttion in IMP7_1hrave_00readme.txt.

Cadence
PT1H
Support
SupportQuantity
Other
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. The coordinate system is not clear. Assumed thhat the coordinate system is solar ecliptic based on the 2 min averages.

Cadence
PT1H
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
PT1H
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
PT1H
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. The units are not entirely clear. Assumed thhat the units are degrees based on the 2 min averages.

Cadence
PT1H
Units
degrees
Particle
ParticleType
Proton
Qualifier
Magnitude
ParticleQuantity
ArrivalDirection
Parameter #7
Name
Maximum Temperature
ParameterKey
Column_11
Description

Maximum proton temprature in units of Kelvin.

Cadence
PT1H
Units
K
Particle
ParticleType
Proton
Qualifier
Maximum
ParticleQuantity
Temperature
Parameter #8
Name
Minimum Temperature
ParameterKey
Column_12
Description

Minimum proton temprature in units of Kelvin.

Cadence
PT1H
Units
K
Particle
ParticleType
Proton
Qualifier
Minimum
ParticleQuantity
Temperature
Parameter #9
Name
Proton Temperature
ParameterKey
Column_13
Description

Proton temprature in units of degrees.

Cadence
PT1H
Units
K
Particle
ParticleType
Proton
Qualifier
Average
ParticleQuantity
Temperature
Parameter #10
Name
Pressure Tensor
ParameterKey
Column_14
Description

Pressure tensor symmetry axis in units of degrees. This description is based on the IMP7 2 min averaged data.

Cadence
PT1H
Units
degrees
Particle
ParticleType
Proton
Qualifier
DirectionAngle
ParticleQuantity
Pressure
Parameter #11
Name
Alpha Proton Ratio
ParameterKey
Column_15
Description

Ratio of alphas to protons.

Cadence
PT1H
Particle
ParticleType
AlphaParticle
ParticleType
Proton
Qualifier
Ratio
ParticleQuantity
NumberDensity
Parameter #12
Name
Relative Alpha Proton flow speed
ParameterKey
Column_16
Description

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

Cadence
PT1H
Units
km/s
Particle
ParticleType
AlphaParticle
ParticleType
Proton
Qualifier
Magnitude
ParticleQuantity
FlowSpeed
Parameter #13
Name
Relative Alpha to Proton Angle
ParameterKey
Column_17
Description

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

Cadence
PT1H
Units
degrees
Particle
ParticleType
AlphaParticle
ParticleType
Proton
Qualifier
Magnitude
ParticleQuantity
ArrivalDirection
Parameter #14
Name
Alpha proton temperature ratio
ParameterKey
Column_18
Description

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

Cadence
PT1H
Particle
ParticleType
AlphaParticle
ParticleType
Proton
Qualifier
Ratio
ParticleQuantity
Temperature
Parameter #15
Name
Standard Deviation in the Spacecraft Position Vector in Solar Ecliptic coordinates
ParameterKey
Column_19 Column_20 Column_21
Description

Standard deviation of the location of the spacecraft in solar ecliptic coordinates in units of kilometers and degrees. The coordinate system is not clear. Assumed thhat the coordinate system is solar ecliptic based on the 2 min average data files.

Cadence
PT1H
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
SE
Structure
Size
3
Element
Name
Standard deviation of theRadius
Qualifier
Component.I
Index
1
ParameterKey
column_19
Units
km
Element
Name
Standard deviation of the SELat
Qualifier
Component.J
Index
2
ParameterKey
column_20
Units
degrees
Element
Name
Standard deviation of the SELong
Qualifier
Component.K
Index
3
ParameterKey
column_21
Units
degrees
Support
Qualifier
StandardDeviation
SupportQuantity
Positional
Parameter #16
Name
Standard Deviation in the Density
ParameterKey
Column_22
Description

Standard deviation in the density values in units of #/cm^3.

Cadence
PT1H
Units
#/cm^3
Particle
ParticleType
Proton
Qualifier
StandardDeviation
ParticleQuantity
NumberDensity
Parameter #17
Name
Standard Deviation in the Flow Speed
ParameterKey
Column_23
Description

Standard deviation in the speed values in units of km/s.

Cadence
PT1H
Units
km/s
Particle
ParticleType
Proton
Qualifier
StandardDeviation
ParticleQuantity
FlowSpeed
Parameter #18
Name
Standard Deviation in the Flow Azimuth
ParameterKey
Column_24
Description

Standard deviation in the flow azimuth direction in units of degrees. The units are not entirely clear. Assumed thhat the units are degrees based on the 2 min averages.

Cadence
PT1H
Units
degrees
Particle
ParticleType
Proton
Qualifier
StandardDeviation
ParticleQuantity
ArrivalDirection
Parameter #19
Name
Standard Deviation in the Maximum Temperature
ParameterKey
Column_25
Description

Standard deviation in the maximum proton temprature in units of Kelvin.

Cadence
PT1H
Units
K
Particle
ParticleType
Proton
Qualifier
StandardDeviation
ParticleQuantity
Temperature
Parameter #20
Name
Standard Deviation in the Minimum Temperature
ParameterKey
Column_26
Description

Standard deviation in the minimum proton temprature in units of Kelvin.

Cadence
PT1H
Units
K
Particle
ParticleType
Proton
Qualifier
StandardDeviation
ParticleQuantity
Temperature
Parameter #21
Name
Standard Deviation in the Proton Temperature
ParameterKey
Column_27
Description

Standard deviation in the proton temprature in units of degrees.

Cadence
PT1H
Units
K
Particle
ParticleType
Proton
Qualifier
StandardDeviation
ParticleQuantity
Temperature
Parameter #22
Name
Standard Deviation in the Pressure Tensor
ParameterKey
Column_28
Description

Pressure tensor symmetry axis in units of degrees. This description is based on the IMP7 2 min averaged data.

Cadence
PT1H
Units
degrees
Particle
ParticleType
Proton
Qualifier
StandardDeviation
ParticleQuantity
Pressure
Parameter #23
Name
Standard Deviation in the Alpha Proton Ratio
ParameterKey
Column_29
Description

Standard deviation in the ratio of alphas to protons.

Cadence
PT1H
Particle
ParticleType
AlphaParticle
ParticleType
Proton
Qualifier
StandardDeviation
ParticleQuantity
Fluence
Parameter #24
Name
Standard Deviation in the Relative Alpha Proton Flow Speed
ParameterKey
Column_30
Description

Standard deviation in the relative flow speed of alphas to protons in units of km/s.

Cadence
PT1H
Units
km/s
Particle
ParticleType
AlphaParticle
ParticleType
Proton
Qualifier
StandardDeviation
ParticleQuantity
FlowSpeed
Parameter #25
Name
Standard Deviation in the Relative Alpha to Proton Angle
ParameterKey
Column_31
Description

Standard deviation in the relative flow angle of alphas to protons in units of degrees.

Cadence
PT1H
Units
degrees
Particle
ParticleType
AlphaParticle
ParticleType
Proton
Qualifier
StandardDeviation
ParticleQuantity
ArrivalDirection
Parameter #26
Name
Standard Deviation in the Alpha Proton Temperature Ratio
ParameterKey
Column_32
Description

Standard deviation in the ratio of the temperature of the alphas to the temperature of the protons.

Cadence
PT1H
Particle
ParticleType
AlphaParticle
ParticleType
Proton
Qualifier
StandardDeviation
ParticleQuantity
Temperature