PREDICCS: Predictions of Radiation from REleASE, EMMREM, and Data Incorporating CRaTER, COSTEP (EPHIN), and other SEP measurements

Mathematics – Logic

Scientific paper

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[7924] Space Weather / Forecasting, [7938] Space Weather / Impacts On Humans, [7959] Space Weather / Models, [7984] Space Weather / Space Radiation Environment

Scientific paper

Accurate models for the radiation environment through the heliosphere are necessary for future manned missions. PREDICCS will be an on-line system - available for scientists and the public - to predict and forecast the radiation environment through interplanetary space. It integrates two radiation environment models with Solar Energetic Particle (SEP) measurements: the Earth-Moon-Mars Radiation Environment Module (EMMREM) and the Relativistic Electron Alert System for Exploration (REleASE) and incorporates data from the CRaTER and COSTEP (EPHIN) instruments, and other SEP measurements. REleASE very accurately forecasts SEP events up to one and a half hours ahead of the event itself [1]. The EMMREM model predicts the real-time radiation environment using two modules: the Energetic Particle Radiation Environment Module (EPREM) and the Baryon Transport Module (BRYNTRN) [2]. We combine these two models to nowcast and forecast the radiation environment at various observers (Earth, Moon, Mars, and at specific target observers such as comets and asteroids) and for future SEP events. Validation of these models requires data from CRaTER, COSTEP (EPHIN), and other SEP measurements. CRaTER characterizes the lunar radiation environment and its biological impacts with LET (Linear Energy Transfer) spectra of galactic and solar cosmic rays [3] and COSTEP (EPHIN) measures relativistic electrons and deka-MeV protons and helium [4]. We have done preliminary comparisons of a recent, albeit small, SEP event from early June 2011 that has shown excellent agreement with EMMREM predictions. This event has been well observed by CRaTER and a number of other instruments and is the first "significant" event as we come out of the longest and deepest solar minimum in the space age. Additional observations of SEP events in the near future will help to fine tune the models in order to predict the radiation environment with more confidence. This will be an invaluable resource for all that are concerned with the radiation environment throughout our solar system.

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