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Southern Spherical Elementary Currents Systems (SECS) technique Southern Hemisphere Equivalent Ionospheric Currents (EICs) derived at 10 sec Resolution in Geographic Coordinates

(2024). Southern Spherical Elementary Currents Systems (SECS) technique Southern Hemisphere Equivalent Ionospheric Currents (EICs) derived at 10 sec Resolution in Geographic Coordinates [Data set]. University of California, Los Angeles. https://doi.org/10.48322/ndpn-7v30. Accessed on .

Note: Proper references, including those in BibTex or other formats, should include the "Accessed on date" as shown above to identify the version of the resource being cited in a given publication.

ResourceID
spase://NSF/NumericalData/SouthernSECS/Magnetometer/EICS/PT10S

Description

The Equivalent Ionospheric Currents (EICs) data set contains horizontal ionospheric current data (Jx and Jy) derived using the SECS technique [Amm and Viljanen, Earth Planets Space, v. 51 pp. 431-440, 1999]. Positive Jx points to the geographic north pole. Positive Jy points to geographic east. The location of these currents is in geographic coordinates at 10s resolution. The distribution of these currents is not the same as the spherical elementary current amplitudes. The UT and date are obtained from the file name. For more information see Weygand et al. J. Geophys. Res. 116, A03305, doi:10.1029/2010JA016177, 2011.

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NumericalData

ResourceID
spase://NSF/NumericalData/SouthernSECS/Magnetometer/EICS/PT10S
ResourceHeader
ResourceName
Southern Spherical Elementary Currents Systems (SECS) technique Southern Hemisphere Equivalent Ionospheric Currents (EICs) derived at 10 sec Resolution in Geographic Coordinates
AlternateName
Southern Hemisphere Equivalent Ionospheric Current data
DOI
https://doi.org/10.48322/ndpn-7v30
ReleaseDate
2024-07-10 00:00:00.000
RevisionHistory
RevisionEvent
ReleaseDate
2024-06-20 00:00:00.000
Note
Created metadata. JMW
RevisionEvent
ReleaseDate
2024-07-10 00:00:00.000
Note
Added DOI. JMW
Description

The Equivalent Ionospheric Currents (EICs) data set contains horizontal ionospheric current data (Jx and Jy) derived using the SECS technique [Amm and Viljanen, Earth Planets Space, v. 51 pp. 431-440, 1999]. Positive Jx points to the geographic north pole. Positive Jy points to geographic east. The location of these currents is in geographic coordinates at 10s resolution. The distribution of these currents is not the same as the spherical elementary current amplitudes. The UT and date are obtained from the file name. For more information see Weygand et al. J. Geophys. Res. 116, A03305, doi:10.1029/2010JA016177, 2011.

Acknowledgement
Dr. M.D. Hartinger; Dr. J.M. Weygand; Magnetosphere Ionosphere Science Team (MIST), British Antarctic Survey (BAS), GeoForschungsZentrum (GFZ), and the Automatic Geophysical Observatories (AGO)
PublicationInfo
Authors
Weygand, J.M. and M. Hartinger
PublicationDate
2024-06-20 00:00:00.000
PublishedBy
University of California, Los Angeles
Funding
Agency
NSF-NERC
Project
Collaborative Research - Conjugate Experiment to Investigate the Sources of High-Latitude Magnetic Perturbations in the Coupled Solar Wind-Magnetosphere-Ionosphere-Ground System
AwardNumber
2027190
Contacts
RolePersonStartDateStopDateNote
1.PrincipalInvestigatorspase://SMWG/Person/Michael.Hartinger
2.Scientistspase://SMWG/Person/James.M.Weygand
3.MetadataContactspase://SMWG/Person/James.M.Weygand
InformationURL
Name
Journal of Earth, Planets, and Space article on the SECS technique
URL
https://doi.org/10.1029/2009JA014832
Description

Research Article on the SECS technique.

InformationURL
Name
Journal of Geophysical Research article on the SECS technique as Applied to North America
URL
https://doi.org/10.1029/2010JA016177
Description

Research Article on the SECS technique applied to North America and Greenland.

AccessInformation
RepositoryID
spase://SMWG/Repository/SECS
Availability
Online
AccessRights
Open
AccessURL
Name
Spherical Elementary Currents Systems (SECS) dataset
URL
http://vmo.igpp.ucla.edu/data1/SECS/
Description

Equivalent ionsheric current data produced over Antarctica.

Format
Text
Acknowledgement
Dr. M.D. Hartinger; Dr. J.M. Weygand; MIST, BAS, NJIT, and GFZ
ProcessingLevel
Uncalibrated
ProviderResourceName
THEMIS
ProviderProcessingLevel
Numerical Data
InstrumentIDs
spase://NSF/Instrument/Ground/SouthernSECS/Magnetometer
MeasurementType
MagneticField
TemporalDescription
TimeSpan
StartDate
2015-01-01 00:00:00
StopDate
2016-12-31 23:59:59
Note
Universal time of the data is given in the filename.
Cadence
PT10S
Keywords
10 sec
ground magnetometer data
equivalent ionospheric currents
spherical elementary current systms
Parameter #1
Name
Geographic Location of Equivalent Ionospheric Current
ParameterKey
geo_loc
Description

These data are the geographic location in units of degrees of the derived equivalent ionospheric current at 10 s resolution. The Altitude of the current vector is 100 km above the surface of the Earth.

Caveats
The date and time are obtained from the file name.
Units
degrees
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEO
Structure
Size
2
Description

Geographic Latitude and Longitude of the derived equivalent ionospheric current value.

Element
Name
Geographic Latitude
Qualifier
DirectionAngle.ElevationAngle
Index
1
Units
degrees
ValidMin
0
ValidMax
90
Element
Name
Geographic Longitude
Qualifier
DirectionAngle.AzimuthAngle
Index
2
Units
degrees
ValidMin
0
ValidMax
360
Support
Qualifier
Vector
SupportQuantity
Positional
Parameter #2
Name
Equivalent Ionospheric Currents (Jx and Jy)
ParameterKey
Jx_Jy
Description

These data are the Equivalent Ionospheric Currents (only the currents horizontal to the surface of the Earth: Jx and Jy) in units of mA/m at 10 s resolution. The Altitude of the current vector is 100 km above the surface of the Earth.

Caveats
The date and time are obtained from the file name. These are not the Hall currents, but a combination of the Hall and Pederson currents.
Units
mA/m
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEO
Structure
Size
2
Description

Jx of the derived equivalent ionospheric current value. Positive Jx points to the geographic north pole. Positive Jy points to geographic east.

Element
Name
Jx
Qualifier
Component.I
Index
1
Units
mA/m
ValidMin
-1e8
ValidMax
1e8
Element
Name
Jy
Qualifier
Component.J
Index
2
Units
mA/m
ValidMin
-1e8
ValidMax
1e8
Support
Qualifier
Vector
SupportQuantity
Other