93ff55bf-7415-44c8-8e3d-7e2f5c5ffd6d eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2019-06-07 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 Effects of VLF transmitter waves on the inner belt and slot region 2019-06-07 creation 2019-06-07 revision 2019-06-07 publication 2019-06-07 released 1.0 https://doi.org/10.5285/93ff55bf-7415-44c8-8e3d-7e2f5c5ffd6d doi GB/NERC/BAS/PDC/01152 https://data.bas.ac.uk/ NE/P01738X/1 award 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 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. No credit. completed Ross, Johnathan British Antarctic Survey, Natural Environment Research Council, UK Research & Innovation Researcher author Meredith, Nigel British Antarctic Survey, Natural Environment Research Council, UK Research & Innovation Researcher author Glauert, Sarah British Antarctic Survey, Natural Environment Research Council, UK Research & Innovation Researcher author Horne, Richard British Antarctic Survey, Natural Environment Research Council, UK Research & Innovation Researcher author Clilverd, Mark British Antarctic Survey, Natural Environment Research Council, UK Research & Innovation Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Sun-earth Interactions > Solar Energetic Particle Flux > Electron Flux EARTH SCIENCE > Sun-earth Interactions > Ionosphere/Magnetosphere Dynamics > Plasma Waves EARTH SCIENCE > Sun-earth Interactions > Ionosphere/Magnetosphere Dynamics theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher VLF transmitters electron diffusion inner radiation belt plasma waves slot region theme Perigee of ~1.1RE; apogee of ~5.8RE; inclination of 10 degrees Van Allen Radiation Belts place Atmospheric conditions theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license This dataset is supplied under the Open Government Licence v3.0: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ url url crossReference url url largerWorkCitation url url crossReference textTable eng utf8 climatologyMeteorologyAtmosphere -180.0 180.0 -90.0 90.0 2012-10-26 2017-08-31 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. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor text/csv text/plain bytes 2621440 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=93ff55bf-7415-44c8-8e3d-7e2f5c5ffd6d WWW:LINK-1.0-http--link Get Data Download data download bytes 2621440 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=93ff55bf-7415-44c8-8e3d-7e2f5c5ffd6d WWW:LINK-1.0-http--link Get Data Download data download dataset 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. asNeeded completed