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OMNI 27-Day Data Set

(2020). OMNI 27-Day Data Set [Data set]. NASA Space Physics Data Facility. https://doi.org/10.48322/nmh3-jf75 (CiteAs link). Accessed on .

ResourceID
spase://NASA/NumericalData/OMNI/P27D

Description

27-day averaged, multi-source, near-Earth solar wind magnetic field, plasma and energetic proton flux data, plus AE, AU, AL, Kp, ap, and Dst geomagnetic indices, Polar Cap (Thule) index, F10.7 index, and Rz (sunspot number). Also available at 1-hour and 1-day resolution.

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Details

Version:2.3.2

NumericalData

ResourceID
spase://NASA/NumericalData/OMNI/P27D
ResourceHeader
ResourceName
OMNI 27-Day Data Set
DOI
https://doi.org/10.48322/nmh3-jf75
ReleaseDate
2021-05-31 12:34:56.789
RevisionHistory
RevisionEvent
ReleaseDate
2021-05-31 12:34:56.789
Note
Updated to SPASE Version 2.3.2 if needed, Applied quality control for DOI usage, LFB
Description

27-day averaged, multi-source, near-Earth solar wind magnetic field, plasma and energetic proton flux data, plus AE, AU, AL, Kp, ap, and Dst geomagnetic indices, Polar Cap (Thule) index, F10.7 index, and Rz (sunspot number). Also available at 1-hour and 1-day resolution.

Acknowledgement
We acknowledge the experiment teams that acquired, processed and provided the OMNI-included data, and J.H. King and N.E. Papitashvili of NASA/GSFC for creating the OMNI data set.
PublicationInfo
Authors
Papitashvili, Natalia E.; & King, Joseph H.
PublicationDate
2020-01-01 00:00:00
PublishedBy
NASA Space Physics Data Facility
Contacts
RolePersonStartDateStopDateNote
1.GeneralContactspase://SMWG/Person/Joseph.H.King
2.TechnicalContactspase://SMWG/Person/Natalia.E.Papitashvili
InformationURL
Name
OMNI documentation at OMNIWeb
URL
Description

Extensive OMNI documentation pages

Association
AssociationID
AssociationType
DerivedFrom
Association
AssociationID
AssociationType
DerivedFrom
Association
AssociationID
AssociationType
DerivedFrom
Association
AssociationID
AssociationType
DerivedFrom
Association
AssociationID
AssociationType
DerivedFrom
Association
AssociationID
AssociationType
DerivedFrom
Association
AssociationID
AssociationType
DerivedFrom
Association
AssociationID
AssociationType
DerivedFrom
Association
AssociationID
AssociationType
DerivedFrom
Association
AssociationID
AssociationType
DerivedFrom
PriorIDs
spase://VMO/NumericalData/OMNI/P27D
spase://VSPO/NumericalData/OMNI/P27D
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
OMNIWeb
URL
Description

Pathway to data and to extensive documentation. Plots, listings and user-specified files. Scatter plots and linear regressions. Distributions. Means, medians, standard deviations in distributions. Pathway to 1-min, 5-min, 1-hour, 1-day, 27-day averages.

AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
Description

ftp access to file of 27-day OMNI data

AccessURL
Name
HTTPS from SPDF
URL
Description

In CDF via HTTP from SPDF

Format
Text
DataExtent
Quantity
202
Units
kB
Acknowledgement
We acknowledge the experiment teams that acquired, processed and provided the OMNI-included data, and J.H. King and N.E. Papitashvili of NASA/GSFC for creating the OMNI data set.
ProcessingLevel
Calibrated
InstrumentIDs
MeasurementType
ThermalPlasma
MeasurementType
MagneticField
MeasurementType
EnergeticParticles
MeasurementType
ActivityIndex
TemporalDescription
TimeSpan
StartDate
1963-11-02 00:00:00
RelativeStopDate
-P1M
Note
Various parameters are held current to differing levels. Typical delay is about 1-2 months.
Cadence
P27D
ObservedRegion
Heliosphere.NearEarth
Parameter #1
Name
Average magnetic field magnitude
ParameterKey
Column09
Description

Average of fine scale field magnitudes

Cadence
P27D
Units
nT
Field
Qualifier
Magnitude
FieldQuantity
Magnetic
Parameter #2
Name
Magnitude of average magnetic field vector
ParameterKey
Column10
Description

Magnitude of vector-averaged magnetic field vector. SQRT(<Bx>2 + <By>2 +<Bz>**2)

Cadence
P27D
Units
nT
Field
Qualifier
Magnitude
FieldQuantity
Magnetic
Parameter #3
Name
Azimuthal angle of average magnetic field vector
ParameterKey
Column12
Description

Azimuthal angle of vector-averaged magnetic field vector. ARCTAN <By>/<Bx>

Cadence
P27D
Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GSE
Field
Qualifier
DirectionAngle.AzimuthAngle
FieldQuantity
Magnetic
Parameter #4
Name
Elevation angle of average magnetic field vector
ParameterKey
Column11
Description

Elevation angle of vector-averaged magnetic field vector. ARCTAN <Bz>/SQRT(<Bx>2 + <By>2)

Cadence
P27D
Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GSE
Field
Qualifier
DirectionAngle.ElevationAngle
FieldQuantity
Magnetic
Parameter #5
Name
Magnetic field vector, GSE
Description

Averaged GSE Cartesian components of magnetic field vector

Cadence
P27D
Units
nT
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Structure
Size
3
Description

Three hourly averaged magnetic field Cartesian components, in GSE

Element
Name
Bx, GSE
Qualifier
Component.I
Index
1
ParameterKey
Column13
Element
Name
By, GSE
Qualifier
Component.J
Index
2
ParameterKey
Column14
Element
Name
Bz, GSE
Qualifier
Component.K
Index
3
ParameterKey
Column15
Field
Qualifier
Component
FieldQuantity
Magnetic
Parameter #6
Name
Magnetic field vector, GSM
Description

Averaged GSM Cartesian components of magnetic field vector

Caveats
Note that Bx(GSM)=Bx(GSE) is given only once in data record.
Cadence
P27D
Units
nT
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSM
Structure
Size
3
Description

Three hourly averaged magnetic field Cartesian components, in GSE

Element
Name
Bx, GSM
Qualifier
Component.I
Index
1
ParameterKey
Column13
Element
Name
By, GSM
Qualifier
Component.J
Index
2
ParameterKey
Column16
Element
Name
Bz, GSM
Qualifier
Component.K
Index
3
ParameterKey
Column17
Field
Qualifier
Component
FieldQuantity
Magnetic
Parameter #7
Name
Standard deviations in GSE component averages
Description

Standard deviations in averaged GSE Cartesian components of magnetic field vector

Cadence
P27D
Units
nT
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Structure
Size
3
Description

Three standard deviations in hourly averaged GSE magnetic field Cartesian components

Element
Name
sigma Bx, GSE
Qualifier
Component.I
Index
1
ParameterKey
Column20
Element
Name
sigma By, GSE
Qualifier
Component.J
Index
2
ParameterKey
Column21
Element
Name
sigma Bz, GSE
Qualifier
Component.K
Index
3
ParameterKey
Column22
Field
Qualifier
StandardDeviation
FieldQuantity
Magnetic
Parameter #8
Name
Standard deviation in average magnetic field magnitude
ParameterKey
Column18
Description

Standard derviation in average of fine scale field magnitudes

Cadence
P27D
Units
nT
Field
Qualifier
StandardDeviation
FieldQuantity
Magnetic
Parameter #9
Name
Standard deviation of average magnetic field vector
ParameterKey
Column19
Description

Standard deviation of vector-averaged magnetic field vector. SQRT(sigma<Bx>2 + sigma<By>2 + Sigma<Bz>**2)

Cadence
P27D
Units
nT
Field
Qualifier
StandardDeviation
FieldQuantity
Magnetic
Parameter #10
Name
Plasma proton temperature
ParameterKey
Column23
Description

Plasma proton temperature, variously derived for various OMNI-input data sets. Cross normalized

Cadence
P27D
Units
DegK
Particle
ParticleType
Proton
Qualifier
Average
ParticleQuantity
Temperature
Parameter #11
Name
Plasma proton density
ParameterKey
Column24
Description

Plasma proton density, variously derived for various OMNI-input data sets. Cross normalized

Cadence
P27D
Units
number/cc
Particle
ParticleType
Proton
Qualifier
Average
ParticleQuantity
NumberDensity
Parameter #12
Name
Plasma proton flow speed
ParameterKey
Column25
Description

Plasma proton flow speed, variously derived for various OMNI-input data sets. Cross normalized

Cadence
P27D
Units
km/s
Particle
ParticleType
Proton
Qualifier
Average
ParticleQuantity
FlowSpeed
Parameter #13
Name
Flow azimuth angle
ParameterKey
Column26
Description

Angle from negative Xgse axis towards positive Ygse axis

Cadence
P27D
Units
Deg
Particle
ParticleType
Proton
Qualifier
DirectionAngle.AzimuthAngle
ParticleQuantity
FlowVelocity
Parameter #14
Name
Flow elevation angle
ParameterKey
Column27
Description

Angle (lease angle) from GSE X-Y plane to flow vector

Cadence
P27D
Units
Deg
Particle
ParticleType
Proton
Qualifier
DirectionAngle.ElevationAngle
ParticleQuantity
FlowVelocity
Parameter #15
Name
Alpha to proton density ratio
ParameterKey
Column28
Description

Alpha to proton density ratio

Cadence
P27D
Particle
ParticleType
AlphaParticle
ParticleType
Proton
Qualifier
Ratio
ParticleQuantity
NumberDensity
Parameter #16
Name
Flow pressure
ParameterKey
Column29
Description

P (nPa) = (1.67/106) * NpV2 * (1+ 4Na/Np), created from hourly averaged Np, Na, V

Cadence
P27D
Units
nPa
Particle
ParticleType
Proton
ParticleType
AlphaParticle
Qualifier
Average
ParticleQuantity
Pressure
Parameter #17
Name
Plasma parameter standard deviations
Description

An array of 6 standard deviations in the hourly averages of temperature, density, flow speed, two flow direction angles and the Na/Np ratio

Caveats
The units of the standard deviations match the units of the parent parameters.
Cadence
P27D
Structure
Size
6
Description

An array of 6 standard deviations in the hourly averages of temperature, density, flow speed, two flow direction angles and the Na/Np ratio

Element
Name
SigmaT
Index
1
ParameterKey
Column30
Element
Name
SigmaN
Index
2
ParameterKey
Column31
Element
Name
SigmaV
Index
3
ParameterKey
Column32
Element
Name
sigmaPhiV
Index
4
ParameterKey
Column33
Element
Name
SigmaThetaV
Index
5
ParameterKey
Column34
Element
Name
SigmaNa/Np
Index
6
ParameterKey
Column35
Particle
ParticleType
Proton
Qualifier
StandardDeviation
ParticleQuantity
NumberDensity
Parameter #18
Name
VxB Electric Field
ParameterKey
Column36
Description

-V(km/s) * Bz (nT; GSM) * 10**-3; Hourly averaged V and Bz used nearly Ey component

Cadence
P27D
Units
mV/m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSM
Field
Qualifier
Average
FieldQuantity
Electric
Parameter #19
Name
Plasma beta
ParameterKey
Column37
Description

[(T4.16/105) + 5.34] * Np / B*2

Cadence
P27D
Mixed
MixedQuantity
PlasmaBeta
Parameter #20
Name
Alfven Mach Number
ParameterKey
Column38
Description

(V * Np**0.5) / 20 * B

Cadence
P27D
Mixed
MixedQuantity
AlfvenMachNumber
Parameter #21
Name
Kp Index
ParameterKey
Column39
Description

Kp index, but rather than standard 3-,3,3+, we use 27,30,33, etc.

Cadence
P27D
Support
SupportQuantity
Other
Parameter #22
Name
ap Index
ParameterKey
Column50
Description

ap index

Cadence
P27D
Support
SupportQuantity
Other
Parameter #23
Name
Sunspot Number
ParameterKey
Column40
Description

Daily sunspot number

Cadence
P27D
Support
SupportQuantity
Other
Parameter #24
Name
F10.7 Index
ParameterKey
Column51
Description

F10.7 solar index

Cadence
P27D
Support
SupportQuantity
Other
Parameter #25
Name
Dst Index
ParameterKey
Column41
Description

Dst Index

Caveats
Note that quick look values are given for most recent times, to be replaced by preliminary values as they become available, in turn to be replaced by definitive values as they become available
Cadence
P27D
Units
nT
Support
SupportQuantity
Other
Parameter #26
Name
AE Index
ParameterKey
Column42
Description

AE Index

Caveats
Note that quick look values are given for most recent times, to be replaced by preliminary values as they become available, in turn to be replaced by definitive values as they become available
Cadence
P27D
Units
nT
Support
SupportQuantity
Other
Parameter #27
Name
AL Index
ParameterKey
Column53
Description

AL Index

Caveats
Note that quick look values are given for most recent times, to be replaced by preliminary values as they become available, in turn to be replaced by definitive values as they become available
Cadence
P27D
Units
nT
Support
SupportQuantity
Other
Parameter #28
Name
AU Index
ParameterKey
Column54
Description

AU Index

Caveats
Note that quick look values are given for most recent times, to be replaced by preliminary values as they become available, in turn to be replaced by definitive values as they become available
Cadence
P27D
Units
nT
Support
SupportQuantity
Other
Parameter #29
Name
Polar Cap (N) Index
ParameterKey
Column52
Description

Polar Cap Index based on Thule

Cadence
P27D
Support
SupportQuantity
Other
Parameter #30
Name
Energetic Proton Fluxes
Description

Hourly fluxes of protons above 1, 2, 4, 10, 30, 60 MeV; 1967-near current; 1973-2005 from IMP 8 CPME; 2006 and later from GOES

Cadence
P27D
Units
number/cm**2 sec ster
Structure
Size
6
Description

One flux for each of the 6 energy thresholds

Element
Name
Proton flux >1 Mev
Index
1
ParameterKey
Column43
Element
Name
Proton flux >2 Mev
Index
2
ParameterKey
Column44
Element
Name
Proton flux >4 Mev
Index
3
ParameterKey
Column45
Element
Name
Proton flux >10 Mev
Index
4
ParameterKey
Column46
Element
Name
Proton flux >30 Mev
Index
5
ParameterKey
Column47
Element
Name
Proton flux >6 Mev
Index
6
ParameterKey
Column48
Particle
ParticleType
Proton
Qualifier
Average
ParticleQuantity
NumberFlux
Parameter #31
Name
number of points in IMF averages
ParameterKey
Column07
Description

Number of daily averages in 27-day magnetic field parameter averages for this day

Support
SupportQuantity
Other
Parameter #32
Name
number of points in plasma averages
ParameterKey
Column08
Description

Number of daily averages in 27-day plasma parameter averages for this day

Support
SupportQuantity
Other