a. Total ionising dose effects shall be analysed for spacecraft and planetary-mission systems to be operated within any of the following radiation environments:
1. Trapped proton and electron belts
NOTE For example, terrestrial and other planetary belts, such as Jovian.
2. Solar protons
3. Secondary particles, except secondary neutrons
NOTE This includes bremsstrahlung from electrons, and protons generated in atmospheric showers in the planetary environment or within large spacecraft or planetary-lander structure.
4. Local sources of radiation.
NOTE For example, in close proximity to radioactive or nuclear-energy sources, e.g. RTGs generating g radiation.