NAIRAS Model Updates and Results on Real-Time Aircraft Radiation Exposure

The Nowcast of Atmospheric Ionizing Radiation for Aviation Safety (NAIRAS) model for the prediction of air-crew radiation exposure levels from both background galactic cosmic rays (GCR) and solar energetic particle events (SEP) that may accompany solar storms. The prototype operational version is currently under development. NAIRAS will provide global, data-driven, real-time exposure predictions of biologically harmful radiation at altitudes from 0-100 km. An overview of the NAIRAS model is given: the concept, design, prototype implementation status, and data access. Example results are presented for the Halloween 2003 and January 2005 solar storm periods.