A RESTful API to calculate cosmic ray quantities in the atmosphere


cosmic rays in earth's atmosphere

Our atmosphere protects us from a hostile space radiation environment comprised of high energy particles of solar and intergalactic origin:

  • solar radiation is significant during unpredictable and short lived solar flares and coronal mass ejections.
  • galactic cosmic radiation is omnipresent and modulated by the Earth's magnetic field, which varies with latitude, longitude, and time of year (due to effects of the solar wind).

Space radiation collides with the nuclei of gases in the atmosphere, leading to a cascade of nuclear and electromagnetic reactions. The result is a complex shower of high energy radiation, the intensity and composition of which varies with altitude.

predictive modelling of aviation radiation

Excessive exposure to radiation can damage DNA and lead to long-term health effects such as an increased risk of cancer.

Radiation levels at altitudes used by commercial aircraft are greater than at sea level and aircrew are classified as radiation workers in some countries; however, planning to limit their exposure, and monitoring, is generally lacking.

Both real-time measurements and predictive modelling of radiation in the atmosphere are important to mitigate the radiation risk posed to assets and crew.

Amentum Aerospace has developed a RESTful API to a validated predictive model of cosmic radiation in the atmosphere. The API calculates radiation doses and other quantities on a particular date, latitude, longitude, and altitude.


The Jabiru Cosmic Ray API is self-documenting. Check out the API inspector