ResourceName
Spherical Elementary Currents Systems (SECS) technique North American Spherical Elementary Current (SEC) Amplitudes derived at 10 sec Resolution in Geographic Coordinates
AlternateName
North American SEC Amplitude data
DOI
https://doi.org/10.21978/p8pp8x
ReleaseDate
2025-11-24 11:14:45Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-05-31 12:34:56.789
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2022-07-25 12:34:56.789
Note
Deleted one InformationURL, updated two InformationURL URLs by JMW 2022-06-02, metadata updated to SPASE 2.4.1, reviewed by LFB 20220724
RevisionEvent
ReleaseDate
2024-06-13 00:00:00.000
Note
Updated to SPASE Version 2.6.0. Heavily revised the metadata in almost everyway. JMW
RevisionEvent
ReleaseDate
2025-08-05 13:12:18Z
Note
Added ObservedRegion(s). Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to value in Version tag. ZCB
RevisionEvent
ReleaseDate
2025-11-24 11:14:45Z
Note
Fixed HTML character codes. Added ResourceType and NamingAuthority. ZCB
Description
The Spherical Elementary Current (SEC) Amplitudes data set contains spherical elementary current amplitude data (J) derived using the SECS technique [Amm and Viljanen, Earth Planets Space, v. 51 pp. 431-440, 1999]. The location of these currents is in geographic coordinates at 10s resolution. The distribution of these currents is not the same as the equivalent ionospheric currents. 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. O. Amm; Dr. J.M. Weygand; Prof. V. Angelopoulos, Athabasca University THEMIS UCLA Magnetometer Network (AUTUMN), Natural Resources Canada (NRCan), Canadian Array for Realtime Investigations of Magnetic Activity (CARISMA), Technical University of Denmark (DTU), Falcon, Geophysical Institute Magnetometer Array (GIMA), MagStar, Magnetometer Array for Cusp and Cleft Studies (MACCS), Mid‐continent MAgnetoseismic Chain (McMAC), Solar Terrestrial Energy Program (STEP), THEMIS, United States Geological Survey (USGS)
PublicationInfo
Authors
Weygand, James M.
PublicationDate
2009-01-01 00:00:00
PublishedBy
University of California, Los Angeles
Funding
Agency
NASA
Project
NASA Themis/Midex
AwardNumber
NAS5-02099
Funding
Agency
NASA
Project
The Dynamics of Earth’s Magnetosphere in the Presence of Flow Shear
AwardNumber
80NSSC18K0570
Funding
Agency
NASA
Project
Investigation of the Role of Force Balance in Magnetosphere-Ionosphere Coupling
AwardNumber
80NSSC18K1220
Funding
Agency
NASA
Project
Data Services Upgrade: Spherical Elementary Currents Systems Archive for Magnetosphere-Ionosphere Coupling over North America
AwardNumber
NNX14AJ77G
Funding
Agency
NASA
Project
Data Services Upgrade: Expansion of the Spherical Elementary Currents Systems Dataset for Magnetosphere-Ionosphere Coupling
AwardNumber
NNX16AD63G
Funding
Agency
NASA
Project
A Proposal for HPDE Community Data and Simulation Metadata and Standards Services
AwardNumber
80GSFC17C0018
Funding
Agency
NASA
Project
Quantifying the response of ionospheric currents to substorm-time and non-substorm fast flows
AwardNumber
80NSSC18K1227
Funding
Agency
NASA
Project
Enhancing Geomagnetically Induced Current Understanding and Prediction over Continental United States
AwardNumber
80NSSC20K1364
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
Funding
Agency
NASA
Project
Assessing Interplanetary Shock-Induced dB/dt Variations Controlled by Impact Angles
AwardNumber
80NSSC22K0756
Funding
Agency
NASA
Project
Extreme High-Latitude Geomagnetic Variations and their Drivers
AwardNumber
80NSSC24K0259
Contacts
InformationURL
Name
Journal of Earth, Planets, and Space article on the SECS technique
URL
Description
Research Article on the SECS technique.
InformationURL
Name
Journal of Geophysical Research article on the SECS technique as Applied to North America
URL
Description
Research Article on the SECS technique applied to North America and Greenland.
InformationURL
Name
SECS technique as Applied to North America
URL
Description
Homepage with contact, "Rules of the Road," and acknowledgement information on the SECS technique applied to North America and Greenland.
PriorIDs
spase://VMO/NumericalData/SECS/Magnetometer/SECS/PT10S
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
Virtual Magnetospheric Observatory
URL
Description
Equivalent ionsheric current data produced over North America and Greenland
Format
Text
Acknowledgement
Dr. O. Amm; Dr. J.M. Weygand; Prof. V. Angelopoulos, CANMOS, CARISMA, DTU, GIMA, MACCS, STEP, THEMIS
Name
Geographic Location of Spherical Elementary Current Amplitude
ParameterKey
geo_loc
Description
These data are the geographic location in units of degrees of the derived spherical elementary current amplitude 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 Laitutde and Longitude of the derived spherical elementary current amplitude 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
Name
Spherical Elementary Current Amplitude(J)
ParameterKey
J
Description
These data are the spherical elementary current amplitude (only the amplitude of J) in units of A 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 FAC currents.
Units
A
ValidMin
-1e8
ValidMax
1e8
Support
Qualifier
Scalar
SupportQuantity
Other
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