Why is radiation testing included in SEW ground tests?

• A. To test the color of the casing.
• B. To assess SEE susceptibility and device performance under ionizing radiation typical of space environment.
• C. To measure acoustic signature.
• D. To evaluate the antenna gain.

Answer: (B)

Radiation testing is included because space electronics must operate reliably in an ionizing-radiation environment. In space, high-energy particles can deposit energy in devices, causing single-event effects (like bit flips or logic upsets) and longer-term degradation from total ionizing dose. Ground tests expose hardware to radiation types and levels that mimic the space environment, allowing engineers to measure SEE susceptibility and overall device performance under those conditions. This helps verify that systems will continue to function correctly, or that appropriate mitigations (redundancy, error correction, shielding) are in place before launch.

The other options don’t fit this purpose: the color of the casing is cosmetic, acoustic signatures relate to mechanical noise rather than radiation effects, and antenna gain concerns RF performance, not how electronics tolerate ionizing radiation.