Interplanetary particle transport simulation for warning system for aviation exposure to solar energetic particles

  title={Interplanetary particle transport simulation for warning system for aviation exposure to solar energetic particles},
  author={Yuki Kubo and Ryuho Kataoka and Tatsuhiko Sato},
  journal={Earth, Planets and Space},
BackgroundSolar energetic particles (SEPs) are one of the extreme space weather phenomena. A huge SEP event increases the radiation dose received by aircrews, who should be warned of such events as early as possible. We developed a warning system for aviation exposure to SEPs. This article describes one component of the system, which calculates the temporal evolution of the SEP intensity and the spectrum immediately outside the terrestrial magnetosphere.FindingsTo achieve this, we performed… 

A Primer on Focused Solar Energetic Particle Transport

The basics of focused transport as applied to solar energetic particles are reviewed, paying special attention to areas of common misconception. The micro-physics of charged particles interacting

Real Time and Automatic Analysis Program for WASAVIES: Warning System for Aviation Exposure to Solar Energetic Particles

A physics‐based warning system for aviation exposure to solar energetic particles, WASAVIES, is improved to be capable of real‐time and automatic analysis. In the improved system, the count rates of

Probabilistic risk assessment of solar particle events considering the cost of countermeasures to reduce the aviation radiation dose

The calculations suggest that GLE events of a magnitude sufficient to exceed the above dose and dose rate thresholds, requiring a change in flight conditions, occur once every 47 and 17 years, respectively, and their conservatively-estimated annual risks are up to around 1.5 thousand USD in the cases of daily-operated long-distance flights.

Nowcast and forecast of galactic cosmic ray (GCR) and solar energetic particle (SEP) fluxes in magnetosphere and ionosphere – Extension of WASAVIES to Earth orbit

Real-time estimation of cosmic-ray fluxes on satellite orbits is one of the greatest challenges in space weather research. Therefore, we develop a system for nowcasting and forecasting the galactic

Radiation Dose Nowcast for the Ground Level Enhancement on 10–11 September 2017

A ground level enhancement event occurred on 10–11 September 2017, associated with an X8.2 solar flare on the western limb of the Sun. We report the results of our manually conducted nowcast using

Automated detection of geomagnetic storms with heightened risk of GIC

Automated detection of geomagnetic storms is of growing importance to operators of technical infrastructure (e.g., power grids, satellites), which is susceptible to damage caused by the consequences

Space Radiation Risk Reduction through Prediction, Detection and Protection

To enable the planned rapid growth of both government and private operators in space, including satellites, space tourism and manned missions to the Moon and to Mars, a realistic and holistic

Extremely severe space weather and geomagnetically induced currents in regions with locally heterogeneous ground resistivity

© 2016 Fujita et al. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits

PSTEP: project for solar–terrestrial environment prediction

Although solar activity may significantly impact the global environment and socioeconomic systems, the mechanisms for solar eruptions and the subsequent processes have not yet been fully understood.



Air shower simulation for WASAVIES: warning system for aviation exposure to solar energetic particles.

To immediately estimate the aircrew doses from the obtained SEP fluxes, the response functions of the particle fluxes generated by the incidence of monoenergetic protons into the atmosphere were developed by performing air shower simulations using the Particle and Heavy Ion Transport code system.


In this work, gradual solar energetic particle (SEP) events observed by multiple spacecraft are investigated with model simulations. Based on a numerical solution of the Fokker–Planck focused


This paper presents a model calculation of solar energetic particle propagation in a three-dimensional interplanetary magnetic field. The model includes essentially all the particle transport

Energetic Particle Events: Efficiency of Interplanetary Shocks as 50 keV < E < 100 MeV Proton Accelerators

We have studied the injection rate of shock-accelerated protons in long-lasting particle events by tracing back the magnetohydrodynamic conditions at the shock under which protons are accelerated.

SOLPENCO: A solar particle engineering code

Forecasting methods for occurrence and magnitude of proton storms with solar soft X rays

Solar energetic proton (SEP) events in the vicinity of Earth have the potential of affecting the performance of civilian, military, and research satellites, including such diverse functions as

Radiation dose forecast of WASAVIES during ground‐level enhancement

Solar energetic particles (SEPs) sometimes induce powerful air showers that significantly increase the radiation dose at flight altitudes. In order to provide information of such a space radiation

Predicting solar energetic proton events (E > 10 MeV)

A high level of proton radiation exposure can be dangerous to astronauts, satellite equipment, and air passengers/crew flying along polar routes. The presented solar energetic proton (SEP) event

Effect of Adiabatic Deceleration on the Focused Transport of Solar Cosmic Rays

In the framework of focused transport theory, adiabatic deceleration arises from adiabatic focusing in the solar wind frame and from differential solar wind convection. An explicit formula is given

Effect of adiabatic cooling on the fitted parallel mean free path of solar energetic particles

The focused transport equation without adiabatic energy loss is widely used to model solar energetic particles' (SEP) interplanetary propagation by fitting spacecraft data. We incorporate the