SLVK225 August 2025 TPS7H5020-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). Using the 95% upper-bounds for the SEL and the SEB/SEGR, the event rate calculation for the SEL and the SEB/SEGR is shown on Table 9-1 and Table 9-2, respectively. It is important to note that this number is for reference since no SEL or SEB/SEGR events were observed.
| 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 | 6.15 x 10-8 | 2.77 × 10–11 | 1.15 × 10–3 | 9.90 × 107 |
| GEO | 1.48 × 10–3 | 9.08 × 10–11 | 3.78 × 10–3 | 3.02 × 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 | 3.07 x 10-8 | 1.38 × 10–11 | 5.77 × 10–4 | 1.98 × 108 |
| GEO | 1.48 × 10–3 | 4.54 × 10–11 | 1.89 × 10–3 | 6.04 × 107 |