1ccb7d38-48d8-4206-be34-b218fa763b5a 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 2020-07-10 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 Pitch angle diffusion coefficients used to calculate electron precipitation from the Earth's radiation belts 2020-07-10 creation 2020-07-10 revision 2020-07-10 publication 2020-07-10 released 1.0 https://doi.org/10.5285/1ccb7d38-48d8-4206-be34-b218fa763b5a doi GB/NERC/BAS/PDC/01362 https://data.bas.ac.uk/ NE/P01738X/1 award NE/R016038/1 award NE/R016445/1 award Please cite this item as: Reidy, J. (2020). Pitch angle diffusion coefficients used to calculate electron precipitation from the Earth's radiation belts (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/1ccb7d38-48d8-4206-be34-b218fa763b5a This dataset contains two NetCDF files: Chorus_daa.nc (labelled from here as a) which contains the chorus pitch angle diffusion coefficients presented in Figure 1 of Reidy et al (2020) and Combined_daa.nc (labelled from here as b) containing the combined pitch angle diffusion coefficients which can be used to do the analysis presented in the remainder of the Reidy et al (2020) paper. These data sets include: a. A matrix containing the pitch angle diffusion coefficients for chorus waves at the angle of the loss cone for energies of 30, 100 and 300 keV between L*= 2-7.5, a full range of MLT sectors and for low (1 < Kp < 2), moderate (2 < Kp < 3) and high (4 < Kp < 7) geomagnetic activity levels. These were calculated from an average wave model presented in Meredith et al (2020) to capture the effect of wave-particle interactions in the BAS Radiation Belt Model (BAS-RBM). Also the arrays containing the energy, L*, MLT and Kp dependence are also included. b, A matrix containing the combined pitch angle diffusion coefficients for chorus, hiss and EMIC waves and coulomb collisions between alpha = 0.5deg -9.45deg, Energy = 28.18-2511.89 keV , L* = 4.25-7.25, MLT = 0-24 and 6 different activity levels. The arrays containing the pitch angle, energy, L*, MLT and Kp dependence are also included. Funding was provided by NERC Highlight Topic Grant NE/P01738X/1 and NERC National Capability grants NE/R016038/1 and NE/R016445/1 No credit. completed Reidy, Jade British Antarctic Survey 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 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 Pitch angle diffusion coefficients radiation belt model wave-particle interactions theme L* between 2 and 7.5 in 0.5L* bins 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 Open Government Licence v3.0 otherRestrictions This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/ otherRestrictions This data is governed by the NERC data policy and supplied under Open Government Licence v.3 doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference url url crossReference doi doi crossReference textTable eng utf8 climatologyMeteorologyAtmosphere -180.0 180.0 -90.0 90.0 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 application/netcdf application/x-hdf bytes 1258291 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=1ccb7d38-48d8-4206-be34-b218fa763b5a WWW:LINK-1.0-http--link Get Data Download data download bytes 1258291 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=1ccb7d38-48d8-4206-be34-b218fa763b5a WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: The diffusion coefficients for the chorus waves were derived using combined observations from seven spacecraft; these observations are binned by L*, MLT, magnetic latitude and geomagnetic activity level as described in Meredith et al. (2012, 2020). In our study we use a chorus diffusion matrix which includes the wave data-set presented in Meredith et al. (2020). To create the data set presented here (a) we interpolated over the entire diffusion matrix in pitch angle to the loss cone angle (assuming a dipole) and in energy to 30, 100 and 300 keV for the aforementioned L*, MLT and activity levels. In the second data file (b), the pitch angle diffusion coefficients for chorus waves, hiss waves (derived as described in Glauert et al. (2014)), EMIC wave (Kerston et al., 2014) and coloumb collisions (calculated as outlined in Abel and Thorne (1998)) are combined. These diffusion coefficients are initially all interpolated to the same alpha, energy, L*, MLT and activity and then added together. We present a subset of this matrix that was used for the analysis presented in Reidy et al (2020). Data collection: These diffusion coefficients were initially calculated using the PADIE code (Glauert & Horne, 2005). Data quality: Any places where there are no data are set to NaNs. asNeeded completed