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TitleComparison of commonly used space radiation environment models (highly elliptical high inclination orbit application)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorNikitina, LORCID logo; Trichtchenko, LORCID logo
SourceGeological Survey of Canada, Open File 7506, 2013, 80 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
File formatpdf
Subjectsgeophysics; remote sensing; satellites; satellite imagery
Illustrationstables; graphs; plots
ProgramPublic Safety Geoscience Northern Canada Geohazards Project
Released2013 11 26
AbstractThis research was undertaken to provide the radiation hazard assessment for satellites in highly elliptical orbits (HEO) based on available models of the radiation environment. This research gives qualitative and quantitative descriptions of the radiation environment on three HEO orbits. These orbits were selected as candidates for the Polar Communications and Weather mission (PCW) proposal to provide continuous communication and meteorological observations in northern areas of Canada. These orbits are 12-hr Molniya orbit, 16-hr TAP orbit, and 24-hr Tundra orbit. The analyses of the trapped radiation are made by simulations using two basic models for the radiation environment, AE8/AP8 and AE9/AP9. The model AE8/AP8 was implemented in Spenvis and is has been used during the last decades, while the AE9/AP9 model has just been released. The comparison of different models for solar proton fluences and galactic cosmic rays have also been done with use of different models available in SPENVIS tools. Comparison of these different models for the trapped radiation, solar proton fluences, and galactic cosmic rays provides the better understanding for the radiation environment on HEO orbits.
Summary(Plain Language Summary, not published)
Space weather refers to the dynamic conditions on the Sun and in the space environment, in particular, in the near-Earth environment, that can affect critical infrastructure and satellites. NRCan operates the Canadian Space Weather Forecast Centre and conducts research into space weather effects on power systems, pipelines, satellites, radio communications and GNSS positioning to help Canadian industry understand and mitigate the effects of space weather. This research provides the comparison of models of space radiation environment in application to highly elliptical orbits. These orbits are considered as candidates for satellites providing a communication service for north regions of Canada.

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