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The geographic structure of radiation dose rates at aircraft altitudes inEarth's atmosphere during the irradiation of Earth by proton spectra fromincoming solar particle events is examined using the recently developed MAIRE+software. Conditions are examined under two incoming proton spectra, a low/hardspectral index and a high/soft spectral index spectra, which are representativeof some of the solar particle events that have caused reasonably sizedGround-Level Enhancements/Events (GLEs) over the past 70 years. It is foundthrough the use of `cut-throughs' of the atmosphere, that the atmosphere can bedivided into three volumes; a high dose rate polar region, a low dose rateequatorial region, and a transition region between the two. The location ofthese regions as a function of latitude, longitude and altitude ischaracterised. It is also found that the location of the transition regionchanges for different magnetospheric disturbance levels, implying that thetotal radiation dose rate an aircraft will experience if it passes through thetransition region will be subject to large systematic uncertainties,particularly during the currently unknown levels of magnetospheric disturbancethat a major solar event could cause. The impact that various magnetosphericconditions might have on dose rates that specific flight routes mightexperience is also discussed.

The Variation of Radiation Effective Dose Rates and Single Event Effect  Rates at Aviation Altitudes with Magnetospheric Conditions and Geographic  Location