Speaker
Description
The Nowcast of Aerospace Ionizing RAdiation System (NAIRAS) model is composed of coupled physics-based models that transport ionizing radiation through the heliosphere, Earth’s magnetosphere, the neutral atmosphere, and aircraft and spacecraft shielding for Earth. while for Mars, the transport is mainly through the heliosphere, and Mars atmosphere (the induced magnetic field effect at Mars remains to be evaluated). The sources of ionizing radiation included in the model are: (1) galactic cosmic rays (GCR), (2) solar energetic particles (SEP), including heavy ions. For Earth applications, NAIRAS also includes inner radiation belt trapped protons and inner and outer radiation belt trapped electrons. The transmission of GCR and SEP ions through the Earth’s geomagnetic field includes the dynamical influence of the interplanetary plasma and magnetic field. The NAIRAS model predicts dosimetric quantities and differential and integral flux and fluence quantities for assessing human radiation exposure and single event effects (SEE) in vehicle electronic systems. NAIRAS for Earth based assets up to cislunar has been running in realtime and run-on-request for a few years at the Community Coordinated Modeling Center. Similar products and capabilities will be available at Mars. In this presentation, we will showcase the products for both around Earth and Mars.
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