☢️ Total Ionizing Dose (TID) Calculator

📖 How to use

1. Pick the orbit class and the equivalent aluminum shielding around the sensitive part (equipment box walls + spacecraft structure, typically 2–4 mm equivalent).选择轨道类型与敏感器件周围的等效铝屏蔽厚度（单机壳体 + 整星结构，通常等效 2–4 mm）。
2. Apply the radiation design margin (×2 per ECSS practice) and compare with the weakest part's TID rating.按 ECSS 惯例乘 2 倍辐射设计余量，与最弱器件的 TID 指标对比。
3. MEO sits in the proton belt heart — doses are 1–2 orders above LEO; spot shielding or rad-hard parts are mandatory there.MEO 位于质子带中心——剂量比 LEO 高 1–2 个量级，必须局部加屏蔽或选抗辐照器件。
4. These curves are order-of-magnitude for early trades — run SPENVIS/OMERE (AE9/AP9 models) for the formal analysis.曲线为方案权衡用的量级估计——正式分析请用 SPENVIS/OMERE（AE9/AP9 模型）。