# Uncertainty Theory-Based Resilience Analysis for LEO Satellite Communication Systems
## 4 LEO-SCS and Its Uncertain Evolution Model
### Uncertain Satellite Network Evolution Model
#### 4.2.4 Evolution Rule of Dynamic Uncertain Satellite Network Model
This research was funded by the National Natural Science Foundation of China (61773044) and the National Key Laboratory of Science and Technology on Reliability and Environmental Engineering (WDZC2019601A301,6142004210102), and National Natural Science Foundation of China (62073009). **Data Availability Statement:** Not applicable. **Conflicts of Interest:** The authors declare no conflict of interest. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Resilience** & **No. of In-Orbit** & & \\
**Satellite Orbital Lifetime (years)** & **1** & **2** & **3** \\ \hline
3 years & 0.7484 & 0.9766 & 0.9963 \\
5 years & 0.8240 & 0.9828 & 0.9967 \\
7 years & 0.9032 & 0.9969 & 0.9973 \\ \hline \hline \end{tabular}
\end{table} 
Table 6: System resilience under different satellite compositions and backup strategies. ## References

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