Space has a hostile radiation environment that increases the risk of cancers in humans and malfunctions in spacecraft electronics. The types of space radiation of primary concern are:
Understanding the space radiation environment for a particular mission profile is becoming increasingly important. Commercial off-the-shelf electronic components that aren't resilient to space radiation are now prevalent. Longer duration missions to cislunar space, Mars, and beyond are placing astronauts at greater risk of radiation exposure.
The AE9/AP9/SPM radiation belt and space plasma specification models were developed by the US Air Force Research Laboratory (AFRL) in collaboration with industry partners. They provide estimates of energetic particle flux along with uncertainties as percentiles.
Our Space Radiation API provides on-demand access to the AE9/AP9/SPM models, calculating omnidirectional flux at a point in a number of coordinate systems.
The DLR model was developed by the Deutsches Zentrum für Luft- und Raumfahrt (The German Aerospace Center). It provides estimates of energetic particle flux, from protons through to Nickel ions. It is used as a source term for space radiation shielding calculations and is particularly important outside Earth's magnetosphere.
A description of the model can be found in the scientific article "A ready-to-use galactic cosmic ray model", Matthiä, Daniel, et al., Advances in Space Research 51.3 (2013).
Our Space Radiation API provides on-demand access to our implementation of the model, calculating flux for a given particle type and date.
To validate the Amentum implementation of the DLR GCR model, we compare model predictions to published data from the following papers:
The reference numbers were extracted from the PDF version of the respective papers using a digitiser.
The plots below show good agreement in both cases.