SLVK181 January 2025 DRV8351-SEP
Event rates were calculated for LEO (ISS) and GEO environments by combining CREME96 orbital integral flux estimations and simplified SEE cross-sections according to methods shown in Heavy Ion Orbital Environment Single-Event Effects Estimations. Assume a minimum shielding configuration of 100mils (2.54mm) of aluminum, and worst-week solar activity (this is similar to a 99% upper bound for the environment). Using the 95% upper-bounds for the SEL and the SEB, the event rate calculation for the SEL and the SEB is shown on Table 9-1 and Table 9-2, respectively.
| Orbit Type | Onset LETEFF (MeV-cm2/mg) | CREME96 Integral FLUX (/day/cm2) | σSAT (cm2) | Event Rate (/day) | Event Rate (FIT) | MTBE (Years) |
|---|---|---|---|---|---|---|
| LEO (ISS) | 48 | 4.50 × 10–4 | 5.68 × 10-8 | 2.55 × 10–11 | 1.06 × 10–3 | 1.07 × 108 |
| GEO | 1.48 × 10–3 | 8.38 × 10–11 | 3.49 × 10–3 | 3.27 × 107 |
| Orbit Type | Onset LETEFF (MeV-cm2/mg) | CREME96 Integral FLUX (/day/cm2) | σSAT (cm2) | Event Rate (/day) | Event Rate (FIT) | MTBE (Years) |
|---|---|---|---|---|---|---|
| LEO (ISS) | 48 | 4.50 × 10–4 | 1.23 × 10-7 | 5.54 × 10–11 | 2.31 × 10–3 | 4.95 × 107 |
| GEO | 1.48 × 10–3 | 1.82 × 10–10 | 7.56 × 10–3 | 1.51 × 107 |