BGS Hosted Metadata
An empirical orthogonal function reanalysis of the northern polar external and induced magnetic field during solar cycle 23 - VERSION 2.0
A netcdf-formatted file containing the original binned data (described in Shore et al [2017]), in their state before they were subjected to EOF analysis.
These have had additional processing applied to the SuperMAG data (publically available at http://supermag.jhuapl.edu/) in the form of sampling them to the centroid of the bins, thus they are worth providing here despite the large file size (approximately 12GB).
To conserve file space, we have removed empty bins, thus the temporal and spatial basis for these data are provided for each filled bin element. Please note that the binned data had not had the temporal mean values (described in Shore et al [2017], and available in the Supporting Information) removed when they were stored in this netcdf file.
The file contains 144 (monthly) sets of 8 variables.
These variables are named:
1: filled_bin_data_YYYYMM_r
2: filled_bin_data_YYYYMM_theta
3: filled_bin_data_YYYYMM_phi
Variables 1 to 3 contain the nanoTesla vales of the binned data for each of the three magnetic field components in the Quasi-Dipole frame.
4: filled_bin_contrib_stations_YYYYMM
The three-letter SuperMAG acronym of the station which contributed to each 5-minute mean data point.
5: filled_bin_colats_YYYYMM
6: filled_bin_longs_YYYYMM
Variables 5 and 6 are the co-latitude and longitude coordinates of each filled bin element.
7: filled_bin_times_YYYYMM
The 5-minute-mean epoch of each filled bin element, with columns in the order: year, month, day, hour, minute, second).
8: filled_bin_indices_YYYYMM
A set of fiducial values describing how the sparse elements of the 1D vector of filled bin values relate to the fiducials of the (transposed!) EOF prediction a 2D matrix product of the spatial and temporal eigenvectors with values in every bin.
An example of the usage of these data is given in the MATLAB program Shore-ms01.m, provided in the Supporting Information of Shore et al [2017].
***** PLEASE BE ADVISED TO USE VERSION 2.0 DATA *****
The VERSION 2.0 data set has been corrected for a bug which led to the bins which span the local midnight meridian having fewer samples than they should. The data density in these bins is now in-line with the rest of the polar coverage. Apart from that change, the original and updated data sets are the same.
Simple
- Date (Creation)
- 2017-06-06
- Date (Revision)
- 2017-06-06
- Date (Publication)
- 2017-06-06
- Date (released)
- 2017-06-06
- Edition
-
None
- Unique resource identifier
- https://doi.org/10.5285/4013dcb3-5151-44ae-9bae-885943139600
- Codespace
-
doi
- Unique resource identifier
- GB/NERC/BAS/PDC/00935
- Codespace
- Other citation details
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Please cite this item as: Shore, R., Freeman, M., & Gjerloev, J. (2017). An empirical orthogonal function reanalysis of the northern polar external and induced magnetic field during solar cycle 23 - VERSION 2.0 (Version None) [Data set]. Polar Data Centre; British Antarctic Survey, Natural Environment Research Council; Cambridge, CB3 0ET, UK.. https://doi.org/10.5285/4013dcb3-5151-44ae-9bae-885943139600
- Credit
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No credit.
- Status
- Completed
- Point of contact
-
Organisation name Individual name Electronic mail address Role British Antarctic Survey Shore, Robert
Author British Antarctic Survey Freeman, Mervyn
Author Johns Hopkins University
Gjerloev, Jesper
Author NERC EDS UK Polar Data Centre Point of contact
- Maintenance and update frequency
- As needed
- Maintenance note
- Completed
-
GEMET - INSPIRE themes, version 1.0
- Access constraints
- Other restrictions
- Other constraints
- no limitations to public access
- Access constraints
- Other restrictions
- Other constraints
- no limitations
- Use constraints
- License
- Other constraints
- Open Government Licence v3.0
- Use constraints
- Other restrictions
- Other constraints
-
Open Government Licence V3.0
- Unique resource identifier
- url
- Codespace
-
url
- Association Type
- Cross reference
- Unique resource identifier
- url
- Codespace
-
url
- Association Type
- Cross reference
- Spatial representation type
- Text, table
- Language
- English
- Character set
- UTF8
- Topic category
-
- Geoscientific information
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- Supplemental Information
-
It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.
- Title
-
European Petroleum Survey Group (EPSG) Geodetic Parameter Registry
- Date (Publication)
- 2008-11-12
- Cited responsible party
-
Organisation name Individual name Electronic mail address Role European Petroleum Survey Group
Publisher
- Unique resource identifier
- urn:ogc:def:crs:EPSG::3031
- Version
-
6.18.3
Distributor
- Distributor contact
-
Organisation name Individual name Electronic mail address Role NERC EDS UK Polar Data Centre Distributor
- Units of distribution
-
bytes
- Transfer size
- 1
- OnLine resource
-
Protocol Linkage Name WWW:LINK-1.0-http--link
https://ramadda.data.bas.ac.uk/repository/entry/show/?entryid=4013dcb3-5151-44ae-9bae-885943139600 Get Data
- Hierarchy level
- Dataset
Metadata
- File identifier
- 4013dcb3-5151-44ae-9bae-885943139600 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Hierarchy level name
-
dataset
- Date stamp
- 2017-06-06
- Metadata standard name
-
ISO 19115 Geographic Information - Metadata
- Metadata standard version
-
ISO 19115:2003(E)
- Metadata author
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Organisation name Individual name Electronic mail address Role NERC EDS UK Polar Data Centre Point of contact
)))
