SLVK281 February 2026 SN54SC1G175-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 described in Heavy Ion Orbital Environment Single-Event Effects Estimations application report. We assume a minimum shielding configuration of 100 mils (2.54 mm) of aluminum, and worst-week solar activity (this is similar to a 99% upper bound for the environment). Table 6-1 and Table 6-2 provide the event rate calculation using the 95% upper-bounds for the SEL and the SET, respectively.
| Orbit Type | Onset LETEFF (MeV-cm2/mg) | CREME96 Integral FLUX (/day/cm2) | σSAT (cm2) | Event Rate (/day) | Event Rate (FIT) | MTBF (Years) |
|---|---|---|---|---|---|---|
| LEO (ISS) | 50 | 3.93 × 10–4 | 4.10 × 10–8 | 1.61 × 10–11 | 6.71 × 10–4 | 1.70 × 108 |
| GEO | 1.28 × 10–3 | 5.23 × 10–11 | 2.18 × 10–3 | 5.24 × 107 |
| Orbit Type | Onset LETEFF (MeV-cm2/mg) | CREME96 Integral FLUX (/day/cm2) | σSAT (cm2) | Event Rate (/day) | Event Rate (FIT) | MTBF (Years) |
|---|---|---|---|---|---|---|
| LEO (ISS) | 50 | 3.93 × 10–4 | 3.69 x 10–7 | 1.45× 10–10 | 6.04× 10–3 | 1.89 × 107 |
| GEO | 1.28 × 10–3 | 4.7× 10–10 | 1.96 × 10–2 | 5.82 × 106 |