BGS Hosted Metadata
Effects of VLF transmitter waves on the inner belt and slot region
Signals from VLF transmitters can leak from the Earth-ionosphere wave guide into the inner magnetosphere, where they propagate in the whistler mode and contribute to electron dynamics in the inner radiation belt and slot region. Observations show that the waves from each VLF transmitter are highly localised, peaking on the nightside in the vicinity of the transmitter. In this study we use ~5 years of Van Allen probe observations to construct global statistical models of the bounce-averaged pitch angle diffusion coefficients for each individual VLF transmitter, as a function of L*, Magnetic Local Time (MLT) and geographic longitude. We construct a 1D pitch-angle diffusion model with implicit longitude and MLT dependence to show that VLF transmitter waves weakly scatter electrons into the drift loss cone. We find that global averages of the wave power, determined by averaging the wave power over MLT and longitude, capture the long-term dynamics of the loss process, despite the highly localised nature of the waves in space. We use our new model to assess the role of VLF transmitters waves, hiss waves, and Coulomb collisions on electron loss in the inner radiation belt and slot region. At moderate relativistic energies, E~ keV, waves from VLF transmitters reduce electron lifetimes by an order of magnitude or more, down to the order of 200 days near the outer edge of the inner radiation belt. However, VLF transmitter waves are ineffective at removing multi-MeV electrons from either the inner radiation belt or slot region.
Funding was provided by the NERC grant NE/P01738X/1.
Simple
- Date (Creation)
- 2019-06-07
- Date (Revision)
- 2019-06-07
- Date (Publication)
- 2019-06-07
- Date (released)
- 2019-06-07
- Edition
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1.0
- Unique resource identifier
- https://doi.org/10.5285/93ff55bf-7415-44c8-8e3d-7e2f5c5ffd6d
- Codespace
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doi
- Unique resource identifier
- GB/NERC/BAS/PDC/01152
- Codespace
- Unique resource identifier
- NE/P01738X/1
- Codespace
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award
- Other citation details
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Please cite this item as: Ross, J., Meredith, N., Glauert, S., Horne, R., & Clilverd, M. (2019). Effects of VLF transmitter waves on the inner belt and slot region (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/93ff55bf-7415-44c8-8e3d-7e2f5c5ffd6d
- Credit
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No credit.
- Status
- Completed
- Point of contact
- Maintenance and update frequency
- As needed
- Maintenance note
- Completed
- Theme
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VLF transmitters
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electron diffusion
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inner radiation belt
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plasma waves
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slot region
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- Place
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Perigee of ~1.1RE; apogee of ~5.8RE; inclination of 10 degrees Van Allen Radiation Belts
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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
- This dataset is supplied under the Open Government Licence v3.0: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
- Unique resource identifier
- url
- Codespace
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url
- Association Type
- Cross reference
- Unique resource identifier
- url
- Codespace
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url
- Association Type
- Larger work citation
- Unique resource identifier
- url
- Codespace
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url
- Association Type
- Cross reference
- Spatial representation type
- Text, table
- Language
- English
- Character set
- UTF8
- Topic category
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- Climatology, meteorology, atmosphere
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- Begin date
- 2012-10-26
- End date
- 2017-08-31
- Supplemental Information
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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
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European Petroleum Survey Group (EPSG) Geodetic Parameter Registry
- Date (Publication)
- 2008-11-12
- Cited responsible party
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Organisation name Individual name Electronic mail address Role European Petroleum Survey Group
Publisher
- Unique resource identifier
- urn:ogc:def:crs:EPSG::3031
- Version
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6.18.3
Distributor
- Distributor contact
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Organisation name Individual name Electronic mail address Role NERC EDS UK Polar Data Centre Distributor
- Distributor format
-
Name Version text/csv text/plain
- Units of distribution
-
bytes
- Transfer size
- 2621440
- OnLine resource
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Protocol Linkage Name WWW:LINK-1.0-http--link
https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=93ff55bf-7415-44c8-8e3d-7e2f5c5ffd6d Get Data
- Units of distribution
-
bytes
- Transfer size
- 2621440
- OnLine resource
-
Protocol Linkage Name WWW:LINK-1.0-http--link
https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=93ff55bf-7415-44c8-8e3d-7e2f5c5ffd6d Get Data
- Hierarchy level
- Dataset
- Statement
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Methodology:
The wave data used in this study are from Meredith et al. [2019] which uses NASA Van Allen Probe A data. Diffusion coefficients are calculated using PADIE (Glauert et al 2005). Electron pitch-angle distributions and associated decay timescales are calculated as described in Ross et al. [2019].
Data quality:
The wave data have been calibrated and quality-controlled prior to release.
Metadata
- File identifier
- 93ff55bf-7415-44c8-8e3d-7e2f5c5ffd6d XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Hierarchy level name
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dataset
- Date stamp
- 2019-06-07
- Metadata standard name
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ISO 19115 Geographic Information - Metadata
- Metadata standard version
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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
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