a. In implementing the different approaches in clause 6.2 the radiation shielding model shall include in the calculations the following geometry elements:
1. Parts packaging, as specified in clause 6.3.2.1.
NOTE Since it is the one that is the closest to the sensitive portion of the part (the die), the influence of packaging on the radiation received by the component can be important, especially for electrons or low-energy (up to a few 10’s MeV) protons.
2. Equipment, as specified in clause 6.3.2.2.
3. Spacecraft, as specified in clause 6.3.2.3.
4. Interfaces between spacecraft and (sub)system, as specified in clause 6.3.2.4.
NOTE Omission from the calculation of geometry elements normally leads to conservative calculations (higher radiation effect predictions), although some packaging and other materials near the die can enhance radiation levels in the die.